Directional Sensing for Online PD Monitoring of MV Cables Wagenaars, P.; van der Wielen, P.C.J.M.; Wouters, P.A.A.F.; Steennis, E.F.

Size: px
Start display at page:

Download "Directional Sensing for Online PD Monitoring of MV Cables Wagenaars, P.; van der Wielen, P.C.J.M.; Wouters, P.A.A.F.; Steennis, E.F."

Transcription

1 Directional Sensing for Online PD Monitoring of MV Cables Wagenaars, P.; van der Wielen, P.C.J.M.; Wouters, P.A.A.F.; Steennis, E.F. Published in: Nordic Insulation Symposium, Nord-IS 05 Published: 01/01/2005 Document Version Publisher s PDF, also known as Version of Record (includes final page, issue and volume numbers) Please check the document version of this publication: A submitted manuscript is the author's version of the article upon submission and before peer-review. There can be important differences between the submitted version and the official published version of record. People interested in the research are advised to contact the author for the final version of the publication, or visit the DOI to the publisher's website. The final author version and the galley proof are versions of the publication after peer review. The final published version features the final layout of the paper including the volume, issue and page numbers. Link to publication Citation for published version (APA): Wagenaars, P., Wielen, van der, P. C. J. M., Wouters, P. A. A. F., & Steennis, E. F. (2005). Directional Sensing for Online PD Monitoring of MV Cables. In Nordic Insulation Symposium, Nord-IS 05 (pp ). Trondheim. General rights Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights. Users may download and print one copy of any publication from the public portal for the purpose of private study or research. You may not further distribute the material or use it for any profit-making activity or commercial gain You may freely distribute the URL identifying the publication in the public portal? Take down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim. Download date: 05. Jan. 2019

2 Directional Sensing for Online PD Monitoring of MV Cables P. Wagenaars, P.C.J.M. van der Wielen, P.A.A.F. Wouters and E.F. Steennis Eindhoven University of Technology, P.O.Box 513, 5600 MB, Eindhoven, The Netherlands Abstract A new system to monitor partial discharges (PDs) online in MV power cables is being developed. For this system sensors are placed in the Ring-Main-Units (RMUs) at each end of the cable. In an RMU, the cable under test is not the only possible source of PDs. Also other MV cables and the MV/LV transformer may produce PDs. From the direction of each measured signal, it is known whether the PD comes from the cable under test or elsewhere. For the proposed solution, two current probes are installed at two locations in the RMU. The two measured currents are combined into one signal. PDs from other sources are removed from the resulting signal, while PDs from the cable under test remain unaffected. Measurements on a test set-up with two powered RMUs showed that this method works well. 2. Theory 2.1. RMU model In a cable and an RMU two different propagation channels can be identified: one between the sheath and three phases and one between two different phases [3]. This paper considers only the channel between the sheath and the three phases together. around MV cable, past last earth connection earth TCC transformer connecting cables (TCC) earth rail 1. Introduction A new system for the detection and localization of PDs in MV cables is being developed [1-4]. This online PD monitoring system detects PDs with inductive current sensors clamped around conductors in the RMUs at each end of the cable under test. An RMU consists of an MV/LV transformer and one or more MV cables (in most situations there are two MV cables). A schematic drawing of a typical Dutch RMU is depicted in figure 1. Usually, all MV cables and the transformer are connected to the MV rail. That implies that during online PD measurements not only PDs from the cable under test are detected, but also PDs from the transformer and other MV cables. For correct interpretation of the measured signal, PDs from these disturbing sources must be removed from the signal. PDs originating from the cable under test propagate from the cable into the RMU, while disturbing PDs propagate from the RMU into the cable under test. Therefore, it is possible to apply directional sensing to distinguish PDs originating from the cable under test from disturbing PDs. In the past, several methods to achieve directional sensing have been described [5-7]. Unfortunately, none of these methods can be used for application without modification of the RMU. This would violate the requirement that the diagnosed equipment must remain unaffected. The presented paper proposes a method of directional sensing that uses two inductive current sensors placed at two locations in the RMU. By combining the signals of both sensors directional sensing is achieved. 1 2 transformer MV cable earth connection Fig. 1 Schematig drawing RMU The equivalent circuit of the RMU depicted in figure 1 consists of several parallel impedances between phases and earth. The MV cables are modeled by their characteristic wave impedances Z 1 and Z 2. The transformer impedance is indicated with Z tr, and the capacitance of the three transformer connecting cables (TCC) with Z. If one of the MV cables produces a PD, it can be described as a current source producing a pulse. In figure 2, the equivalent circuits of the RMU are depicted for a PD coming from cable 1 and for a PD from cable 2. i three phase conductors together i tr i 1 i 2 i tr i i 1 i 2 Z tr Z Z 2 Z tr Z Z 1 (a) PD from cable 1 (b) PD from cable 2 Fig. 2 Equivalent circuits for PDs originating from cable 1 (cable under test) or cable Directional sensing Consider the situation that cable 1 is the cable under test. In figure 2a it can be seen, that for a PD from this 79

3 cable, i 1 and i have an opposite direction, while for a PD from cable 2 (fig. 2b) the direction is the same. If the transfer function H from I to I 1 (with I en I 1 having the same direction) is known, it can be used to remove disturbing PDs (assuming that Z itself does not produce PDs). I1 I1 = 2I1 PD from cable1 I1 H I = (1) I1 I1 = 0 PD from cable 2 Where H = ±I 1 /I, + : PD from cable 2, - : PD from cable 1. Unfortunately, H usually differs for a PD originating from the cable under test and a disturbing PD. If a PD comes from cable 1 I1, Y + Y2 + Ytr H = H1 = = (2) I Y, with Y x is the admittance of impedance Z x. The subscript means: for a PD originating from cable 1. If a PD originates from cable 2 I Y1 H = H (3) Y 1, c2 2 = = I, c2 The subscript c2 means: for a PD originating from cable 2. Note that if the transformer produces a PD, the transfer function H = I 1 /I equals H 2. The problem of the different transfer functions for different PD origins can be solved by means of a correction transfer function H corr. If H in equation 1 is substituted with H 2, PDs from cable 2 (and from the transformer) will be removed from the resulting signal, PDs from cable 1 will be deformed. To correct the deformation, the resulting signal is multiplied by a transfer function H corr I filt = H corr ( I1 H 2 I ) (4) where I filt is the resulting filtered signal, free of disturbing PDs. In order to correct for the distortion, the transfer function H corr must be chosen such, that the filtered signal I filt equals I 1 for PDs from cable 1. Substituting I filt in equation 4 with I 1, yields: H corr = I1, H1 = I H I H + H (5) 1, 2 Note, that H corr = ½ if the two cable characteristic impedances are equal (H 1 = H 2 ) and dominant. Before any signal can be filtered, the transfer functions H 1, H 2 and H corr have to be determined. The most convenient way is to inject two calibration pulses and measure I 1 and I. To determine H 1 a pulse is injected in the 1 2 system as if it originates from cable 1. To determine H 2 a pulse is injected in the system as if it originates from cable 2. Note that this method only works correctly if Z does not produce PDs. Otherwise, a PD from Z would be misinterpreted as a PD from the cable under test. 3. Measurements 3.1. Description of the measurements At the KEMA premises in Arnhem, the Netherlands, a test set-up is designed with typical Dutch RMUs and two MV cables. In one RMU, current sensors are installed around the earth connection of the transformer connecting cables (see figure 1) to measure i. In the same RMU a second current sensor is installed around MV cable 1 past the last earth connection to measure i 1. There are two options for the injection of the calibration pulses: local injection, and injection at the far end of the cable. For local injection a coil is placed around MV cable 1 or 2 past the last earth connection to simulate a pulse originating from respectively cable 1 and cable 2. From the results, the transfer functions H 1 and H 2 are determined. The pulses are made as short as possible to cover the entire frequency range of interest. For far end injection a pulse is injected at equivalent positions at the other RMUs. For the calibration measurement, pulses are injected locally because local injection is more practical. Moreover, a pulse injected at the far end will have less high frequency content because high frequencies attenuate as the pulse travels through the cable. After applying the calibration pulses, several pulses are injected at the far end of cable 1 to simulate PDs from the cable under test and at the far end of cable 2 to simulate disturbing PDs. Finally, a pulse is injected locally with an injection coil around all three transformer connecting cables to simulate a disturbing PD from the transformer. For all test pulses i 1 and i are measured and filtered using equation 4. The measured current i 1 is compared with the filtered signal i filt Measurement results After calibration, the first test pulse is injected at the far end of cable 1. With cable 1 being the cable under test, this pulse should pass the filter undisturbed. Both the measured i 1 and the filtered signal i filt are plotted in figure 3. The small oscillations before the large pulse are picked up by direct radiation through air and are not actual currents in the cable. As can be observed in figure 3, the measured and filtered current match very well. The second test pulse is injected at the far end of cable 2. The current i 1 and the filtered signal i filt are plotted in figure 4. Because a pulse from cable 2 is a disturbing pulse, it should be removed from i filt. It can be seen that the first pulse is indeed almost completely 80

4 removed from i filt. The second pulse is a reflection. The original pulse from cable 2 travels into cable 1 and reflects back at the far end. Because it returns from the cable under test (cable 1) it is not removed from the signal. Apparently the equivalent circuit of figure 2 is not satisfactory for PDs from the transformer. In this circuit, only the impedances of the RMU components are considered. The inductances of the large loops in the RMU are neglected, which become important for the high frequencies involved with local injection. These inductances are introduced in the equivalent circuit of figure 6. In this equivalent circuit, the transfer function I 1 /I for a PD from the transformer is no longer equal to the transfer function H 2 for a PD from cable 2. Therefore, the pulse in the last experiment is not filtered from the signal. i tr i i 1 i 2 Z tr Z Z 1 Z 2 Fig. 3 - Pulse from cable 1, injected at far end Fig. 6 - Equivalent circuit with inductances 4. Alternative directional sensing method Fig. 4 - Pulse from cable 2, injected at far end The third injected pulse simulates the situation of a disturbing PD from the transformer. Both signals, i 1 and i, are plotted in figure 5. Since a PD from the transformer is considered a disturbing PD, it should be removed from the signal. The measurements show clearly that this is not the case Description PDs from the transformer are not removed from the filtered signal and have to be recognized by other means. One way is to look at the polarities of the first peak of the measured currents i and i 1. The polarities of the first peaks are equal for disturbing PDs, while for PDs from the cable under test the polarities are opposite (see figure 2). Using this property, the direction of PDs can be determined as long as the PDs can be clearly separated from each other and do not overlap. An additional advantage is that no calibration is needed Measurements In order to test this technique, positive and negative pulses are injected at the far ends of cable 1 and cable 2. Also pulses are injected as if they would originate from the transformer. In figure 7 the currents i en i 1 are plotted for test pulses from cable 1. In figure 8 the same currents are plotted for pulses from cable 2. Figure 9 depicts i and i 1 for a pulse from the transformer. Figure 7 indeed shows that the first peaks of both currents have opposite polarities. In figure 8 it can be observed that the first peaks of the disturbing pulses have equal polarity. Also disturbing pulses from the transformer (figure 9) have the same polarity. All measurements confirm the predictions from the model, that pulses from the cable under test have opposite initial polarities, while disturbing pulses have the same initial polarity. Fig. 5 - Pulse from transformer, local injection 81

5 6. References Fig. 7 - Positive and negative pulse from cable under test Fig. 8 - Positive and negative disturbing pulse [1] P.C.J.M. van der Wielen, J.Veen, P.A.A.F. Wouters and E.F. Steennis, On-line partial discharge detection of MV cables with defect localisation (PDOL) based on two time synchronised sensors, to be published on the 18th International Conference on Electricity Distribution (CIRED), Turin, Italy, June 6-9, [2] E.F. Steennis, P.C.J.M van der Wielen, J. Veen and P.A.A.F. Wouters, Aspects and implications of on-line PD detection and localization of MV cable systems, Conference Record of the International Conference on Insulated Power Cables (JICABLE), Versailles, France, [3] P.C.J.M. van der Wielen, On-line detection and location of partial discharges in medium-voltage power cables, Ph.D. thesis, Eindhoven University of Technology, Eindhoven, The Netherlands, [4] J. Veen, On-line signal analysis of partial discharges in medium-voltage power cables, Ph.D. thesis, Eindhoven University of Technology, Eindhoven, The Netherlands, [5] B.M. Oliver, Directional Electromagnetic Couplers, Proc. of the Institute of Radio Engineers, Vol. 42, 1954, pp [6] D. Pommerenke, T. Strehl, R. Heinrich, W. Kalkner, F. Schmidt and W. Weissenberg, Discrimination between Internal PD and Other Pulses Using Directional Coupling Sensors on HV Cable Systems, IEEE Trans. on Dielectrics and Electrical Insulation, Vol. 6 No. 6, Dec 1999, pp [7] D. Wenzel, U. Schichler, H. Borsi and E. Gockenbach, Recognition of Partial Discharges on Power Units by Directional Coupling, Proc. of the 9 th Int. Symp. on High Voltage Engineering, Graz, Vol. 5, 1995, paper Fig. 9 - Disturbing pulse from transformer 5. Conclusions The first directional sensing technique described in this paper uses two transfer functions to combine and filter currents measured at two locations in the RMU. This method achieves excellent results for rejecting signals coming from other cables. It fails to remove disturbing PDs originating from the distribution transformer. The alternative directional sensing technique managed to recognize all disturbing pulses. A disadvantage of this technique is, that consecutive PDs need to be clearly separated in time. An advantage is that no calibration is required. 82

PERMANENT ON-LINE MONITORING OF MV POWER CABLES BASED ON PARTIAL DISCHARGE DETECTION AND LOCALISATION AN UPDATE

PERMANENT ON-LINE MONITORING OF MV POWER CABLES BASED ON PARTIAL DISCHARGE DETECTION AND LOCALISATION AN UPDATE PERMANENT ON-LINE MONITORING OF MV POWER CABLES BASED ON PARTIAL DISCHARGE DETECTION AND LOCALISATION AN UPDATE Fred STEENNIS, KEMA, (the Netherlands), fred.steennis@kema.com Peter VAN DER WIELEN, KEMA,

More information

Partial discharge trends in medium voltage cables measured while in-service with PDOL Cuppen, A.N.; Steennis, E.F.; van der Wielen, P.C.J.M.

Partial discharge trends in medium voltage cables measured while in-service with PDOL Cuppen, A.N.; Steennis, E.F.; van der Wielen, P.C.J.M. Partial discharge trends in medium voltage cables measured while in-service with PDOL Cuppen, A.N.; Steennis, E.F.; van der Wielen, P.C.J.M. Published in: Proceedings of the IEEE PES Transmission and Distribution

More information

Partial Discharge Trends in Medium Voltage Cables measured while in-service with PDOL

Partial Discharge Trends in Medium Voltage Cables measured while in-service with PDOL 1 Partial Discharge Trends in Medium Voltage Cables measured while in-service with PDOL André N. Cuppen, E. Fred Steennis, and Peter C. J. M. van der Wielen, Member, IEEE Abstract-- This paper presents

More information

Document Version Publisher s PDF, also known as Version of Record (includes final page, issue and volume numbers)

Document Version Publisher s PDF, also known as Version of Record (includes final page, issue and volume numbers) Measurement of transmission line parameters of threecore power cables with common earth screen Wagenaars, P.; Wouters, P.A.A.F.; van der Wielen, P.C.J.M.; Steennis, E.F. Published in: IET Science, Measurement

More information

Extending the Functionality of On-line PD Monitoring Equipment for MV Power Cables

Extending the Functionality of On-line PD Monitoring Equipment for MV Power Cables 24 th Nordic Insulation Symposium on Materials, Components and Diagnostics 152 Extending the Functionality of On-line PD Monitoring Equipment for MV Power Cables Y. Li 1, P.A.A.F. Wouters 1, P. Wagenaars

More information

Document Version Publisher s PDF, also known as Version of Record (includes final page, issue and volume numbers)

Document Version Publisher s PDF, also known as Version of Record (includes final page, issue and volume numbers) Effect of cable load impedance on coupling schemes for MV power line communication Wouters, P.A.A.F.; van der Wielen, P.C.J.M.; Veen, J.; Wagenaars, P.; Steennis, E.F. Published in: IEEE Transactions on

More information

SMART CABLE GUARD A TOOL FOR ON-LINE MONITORING AND LOCATION OF PD S AND FAULTS IN MV CABLES ITS APPLICATION AND BUSINESS CASE

SMART CABLE GUARD A TOOL FOR ON-LINE MONITORING AND LOCATION OF PD S AND FAULTS IN MV CABLES ITS APPLICATION AND BUSINESS CASE SMART CABLE GUARD A TOOL FOR ON-LINE MONITORING AND LOCATION OF PD S AND FAULTS IN MV CABLES ITS APPLICATION AND BUSINESS CASE Fred STEENNIS Paul WAGENAARS Denny HARMSEN DNV GL the Netherlands DNV GL the

More information

Partial discharge diagnostics on very long and branched cable circuits

Partial discharge diagnostics on very long and branched cable circuits 11 Nordic Insulation Symposium Stockholm, June 11-13, 2001 Partial discharge diagnostics on very long and branched cable circuits Nico van Schaik, E. Fred Steennis, Wim Boone and Dick M. van Aartrijk KEMA

More information

Non resonant slots for wide band 1D scanning arrays

Non resonant slots for wide band 1D scanning arrays Non resonant slots for wide band 1D scanning arrays Bruni, S.; Neto, A.; Maci, S.; Gerini, G. Published in: Proceedings of 2005 IEEE Antennas and Propagation Society International Symposium, 3-8 July 2005,

More information

On-chip antenna integration for single-chip millimeterwave FMCW radars Adela, B.B.; Pual, P.T.M; Smolders, A.B.

On-chip antenna integration for single-chip millimeterwave FMCW radars Adela, B.B.; Pual, P.T.M; Smolders, A.B. On-chip antenna integration for single-chip millimeterwave FMCW radars Adela, B.B.; Pual, P.T.M; Smolders, A.B. Published in: Proceedings of the 2015 9th European Conference on Antennas and Propagation

More information

Document Version Publisher s PDF, also known as Version of Record (includes final page, issue and volume numbers)

Document Version Publisher s PDF, also known as Version of Record (includes final page, issue and volume numbers) Noise figure and S-parameter measurement setups for on-wafer differential 60GHz circuits Sakian Dezfuli, P.; Janssen, E.J.G.; Essing, J.A.J.; Mahmoudi, R.; van Roermund, A.H.M. Published in: Proceedings

More information

Leaky-wave slot array antenna fed by a dual reflector system Ettorre, M.; Neto, A.; Gerini, G.; Maci, S.

Leaky-wave slot array antenna fed by a dual reflector system Ettorre, M.; Neto, A.; Gerini, G.; Maci, S. Leaky-wave slot array antenna fed by a dual reflector system Ettorre, M.; Neto, A.; Gerini, G.; Maci, S. Published in: Proceedings of IEEE Antennas and Propagation Society International Symposium, 2008,

More information

Propagation of partial discharge signals in stator windings of turbine generators Pemen, A.J.M.; van der Laan, P.C.T.; Leeuw, de, W.

Propagation of partial discharge signals in stator windings of turbine generators Pemen, A.J.M.; van der Laan, P.C.T.; Leeuw, de, W. Propagation of partial discharge signals in stator windings of turbine generators Pemen, A.J.M.; van der Laan, P.C.T.; Leeuw, de, W. Published in: IEEE Transactions on Energy Conversion DOI: 10.1109/TEC.2005.847949

More information

Distance Protection of Cross-Bonded Transmission Cable-Systems

Distance Protection of Cross-Bonded Transmission Cable-Systems Downloaded from vbn.aau.dk on: April 19, 2019 Aalborg Universitet Distance Protection of Cross-Bonded Transmission Cable-Systems Bak, Claus Leth; F. Jensen, Christian Published in: Proceedings of the 12th

More information

Two octaves bandwidth passive balun for the eleven feed for reflector antennas Zamanifekri, A.; Yang, J.

Two octaves bandwidth passive balun for the eleven feed for reflector antennas Zamanifekri, A.; Yang, J. Two octaves bandwidth passive balun for the eleven feed for reflector antennas Zamanifekri, A.; Yang, J. Published in: Proceedings of 2010 IEEE International Symposium on Antennas and Propagation, Toronto,

More information

A 13.56MHz RFID system based on organic transponders

A 13.56MHz RFID system based on organic transponders A 13.56MHz RFID system based on organic transponders Cantatore, E.; Geuns, T.C.T.; Gruijthuijsen, A.F.A.; Gelinck, G.H.; Drews, S.; Leeuw, de, D.M. Published in: Proceedings of the IEEE International Solid-State

More information

ON-LINE PARTIAL DISCHARGE TESTING OF SOME OF THE WORST PERFORMING CIRCUITS ON A UTILITY DISTRIBUTION SYSTEM

ON-LINE PARTIAL DISCHARGE TESTING OF SOME OF THE WORST PERFORMING CIRCUITS ON A UTILITY DISTRIBUTION SYSTEM ON-LINE PARTIAL DISCHARGE TESTING OF SOME OF THE WORST PERFORMING CIRCUITS ON A UTILITY DISTRIBUTION SYSTEM D. Clark¹ R. Mackinlay² M. Seltzer-Grant² S. Goodfellow² Lee Renforth² Jamie McWilliam³ and Roger

More information

DBR based passively mode-locked 1.5m semiconductor laser with 9 nm tuning range Moskalenko, V.; Williams, K.A.; Bente, E.A.J.M.

DBR based passively mode-locked 1.5m semiconductor laser with 9 nm tuning range Moskalenko, V.; Williams, K.A.; Bente, E.A.J.M. DBR based passively mode-locked 1.5m semiconductor laser with 9 nm tuning range Moskalenko, V.; Williams, K.A.; Bente, E.A.J.M. Published in: Proceedings of the 20th Annual Symposium of the IEEE Photonics

More information

Calibration of current-steering D/A Converters

Calibration of current-steering D/A Converters Calibration of current-steering D/A Converters Citation for published version (APA): Radulov,. I., Quinn, P. J., Hegt, J. A., & Roermund, van, A. H. M. (2009). Calibration of current-steering D/A Converters.

More information

Voltage dip detection with half cycle window RMS values and aggregation of short events Qin, Y.; Ye, G.; Cuk, V.; Cobben, J.F.G.

Voltage dip detection with half cycle window RMS values and aggregation of short events Qin, Y.; Ye, G.; Cuk, V.; Cobben, J.F.G. Voltage dip detection with half cycle window RMS values and aggregation of short events Qin, Y.; Ye, G.; Cuk, V.; Cobben, J.F.G. Published in: Renewable Energy & Power Quality Journal DOI:.484/repqj.5

More information

On-line partial discharge monitoring of statorwindings : comparison of different sensors Pemen, A.J.M.; Leeuw, de, W.; van der Laan, P.C.T.

On-line partial discharge monitoring of statorwindings : comparison of different sensors Pemen, A.J.M.; Leeuw, de, W.; van der Laan, P.C.T. On-line partial discharge monitoring of statorwindings : comparison of different sensors Pemen, A.J.M.; Leeuw, de, W.; van der Laan, P.C.T. Published in: Proceedings of the 1th International Symposium

More information

A 100MHz CMOS wideband IF amplifier

A 100MHz CMOS wideband IF amplifier A 100MHz CMOS wideband IF amplifier Sjöland, Henrik; Mattisson, Sven Published in: IEEE Journal of Solid-State Circuits DOI: 10.1109/4.663569 1998 Link to publication Citation for published version (APA):

More information

Novel Electrically Small Spherical Electric Dipole Antenna

Novel Electrically Small Spherical Electric Dipole Antenna Downloaded from orbit.dtu.dk on: Sep 1, 218 Novel Electrically Small Spherical Electric Dipole Antenna Kim, Oleksiy S. Published in: iwat Link to article, DOI: 1.119/IWAT.21.546485 Publication date: 21

More information

Document Version Publisher s PDF, also known as Version of Record (includes final page, issue and volume numbers)

Document Version Publisher s PDF, also known as Version of Record (includes final page, issue and volume numbers) A 40 GHz, broadband, highly linear amplifier, employing T-coil bandwith extension technique Cheema, H.M.; Mahmoudi, R.; Sanduleanu, M.A.T.; van Roermund, A.H.M. Published in: IEEE Radio Frequency Integrated

More information

The current distribution on the feeding probe in an air filled rectangular microstrip antenna

The current distribution on the feeding probe in an air filled rectangular microstrip antenna Downloaded from orbit.dtu.dk on: Mar 28, 2019 The current distribution on the feeding probe in an air filled rectangular microstrip antenna Brown, K Published in: Antennas and Propagation Society International

More information

Low-Profile Fabry-Pérot Cavity Antenna with Metamaterial SRR Cells for Fifth Generation Systems

Low-Profile Fabry-Pérot Cavity Antenna with Metamaterial SRR Cells for Fifth Generation Systems Aalborg Universitet Low-Profile Fabry-Pérot Cavity Antenna with Metamaterial SRR Cells for Fifth Generation Systems Ojaroudiparchin, Naser; Shen, Ming; Pedersen, Gert F. Published in: Microwave, Radar

More information

SENSITIVITY ASPECTS OF ON-LINE PD DIAGNOSIS OF MV POWER CABLES

SENSITIVITY ASPECTS OF ON-LINE PD DIAGNOSIS OF MV POWER CABLES SENSITIVITY ASPECTS OF ON-LINE PD DIAGNOSIS OF MV POWER CABLES Frank WESTER, Edward GULSKI, Johan SMIT, Edwin GROOT*, Mark VAN VLIET* Delft University of Technology The Netherlands * NUON The Netherlands

More information

Planar circularly symmetric EBG's to improve the isolation of array elements Llombart, N.; Neto, A.; Gerini, G.; de Maagt, P.J.I.

Planar circularly symmetric EBG's to improve the isolation of array elements Llombart, N.; Neto, A.; Gerini, G.; de Maagt, P.J.I. Planar circularly symmetric EBG's to improve the isolation of array elements Llombart, N.; Neto, A.; Gerini, G.; de Maagt, P.J.I. Published in: Proceedings of the 2005 IEEE Antennas and Propagation Society

More information

A novel output transformer based highly linear RF-DAC architecture Bechthum, E.; Radulov, G.I.; Briaire, J.; Geelen, G.; van Roermund, A.H.M.

A novel output transformer based highly linear RF-DAC architecture Bechthum, E.; Radulov, G.I.; Briaire, J.; Geelen, G.; van Roermund, A.H.M. A novel output transformer based highly linear RF-DAC architecture Bechthum, E.; Radulov, G.I.; Briaire, J.; Geelen, G.; van Roermund, A.H.M. Published in: Proceedings of the 2st European Conference on

More information

Cross-bonding cable and box model based on pulse reflection measurement

Cross-bonding cable and box model based on pulse reflection measurement Published in IET Science, Measurement and Technology Received on 20th December 2013 Revised on 4th June 2014 Accepted on 13th June 2014 ISSN 1751-8822 Cross-bonding cable and box model based on pulse reflection

More information

NANOMEFOS (Nanometer Accuracy Non-contact Measurement of Free-form Optical Surfaces)

NANOMEFOS (Nanometer Accuracy Non-contact Measurement of Free-form Optical Surfaces) NANOMEFOS (Nanometer Accuracy Non-contact Measurement of Free-form Optical Surfaces) Citation for published version (APA): Henselmans, R., Rosielle, P. C. J. N., & Kappelhof, J. P. (2004). NANOMEFOS (Nanometer

More information

EFFECT OF INTEGRATION ERROR ON PARTIAL DISCHARGE MEASUREMENTS ON CAST RESIN TRANSFORMERS. C. Ceretta, R. Gobbo, G. Pesavento

EFFECT OF INTEGRATION ERROR ON PARTIAL DISCHARGE MEASUREMENTS ON CAST RESIN TRANSFORMERS. C. Ceretta, R. Gobbo, G. Pesavento Sept. 22-24, 28, Florence, Italy EFFECT OF INTEGRATION ERROR ON PARTIAL DISCHARGE MEASUREMENTS ON CAST RESIN TRANSFORMERS C. Ceretta, R. Gobbo, G. Pesavento Dept. of Electrical Engineering University of

More information

Published in: Proceedings of the 20th Annual Symposium of the IEEE Photonics Benelux Chapter, November 2015, Brussels, Belgium

Published in: Proceedings of the 20th Annual Symposium of the IEEE Photonics Benelux Chapter, November 2015, Brussels, Belgium A Si3N4 optical ring resonator true time delay for optically-assisted satellite radio beamforming Tessema, N.M.; Cao, Z.; van Zantvoort, J.H.C.; Tangdiongga, E.; Koonen, A.M.J. Published in: Proceedings

More information

The Game Experience Questionnaire

The Game Experience Questionnaire The Game Experience Questionnaire IJsselsteijn, W.A.; de Kort, Y.A.W.; Poels, K. Published: 01/01/2013 Document Version Publisher s PDF, also known as Version of Record (includes final page, issue and

More information

Aalborg Universitet. Linderum Electricity Quality - Measurements and Analysis Silva, Filipe Miguel Faria da; Bak, Claus Leth. Publication date: 2013

Aalborg Universitet. Linderum Electricity Quality - Measurements and Analysis Silva, Filipe Miguel Faria da; Bak, Claus Leth. Publication date: 2013 Aalborg Universitet Linderum Electricity Quality - Measurements and Analysis Silva, Filipe Miguel Faria da; Bak, Claus Leth Publication date: 3 Document Version Publisher's PDF, also known as Version of

More information

Lightning transient analysis in wind turbine blades

Lightning transient analysis in wind turbine blades Downloaded from orbit.dtu.dk on: Aug 15, 2018 Lightning transient analysis in wind turbine blades Candela Garolera, Anna; Holbøll, Joachim; Madsen, Søren Find Published in: Proceedings of International

More information

A Waveguide Transverse Broad Wall Slot Radiating Between Baffles

A Waveguide Transverse Broad Wall Slot Radiating Between Baffles Downloaded from orbit.dtu.dk on: Aug 25, 2018 A Waveguide Transverse Broad Wall Slot Radiating Between Baffles Dich, Mikael; Rengarajan, S.R. Published in: Proc. of IEEE Antenna and Propagation Society

More information

CMOS based terahertz instrumentation for imaging and spectroscopy Matters - Kammerer, M.

CMOS based terahertz instrumentation for imaging and spectroscopy Matters - Kammerer, M. CMOS based terahertz instrumentation for imaging and spectroscopy Matters - Kammerer, M. Published in: Proceedings of the International conference on Technology and instrumentation in particle physics

More information

Pressure estimation in vacuum circuit breakers

Pressure estimation in vacuum circuit breakers Pressure estimation in vacuum circuit breakers Damstra, G.C.; Smeets, R.P.P.; Poulussen, H.B.F. Published in: EEE Transactions on Dielectrics and Electrical nsulation DO: 10.1109/94.388240 Published: 01/01/1995

More information

Pulsed corona for breaking up air bubbles in water

Pulsed corona for breaking up air bubbles in water Pulsed corona for breaking up air bubbles in water van Heesch, E.J.M.; Lemmens, R.H.P.; Franken, B.F.C.; Ptasinski, K.J.; Geurts, F.L.S. Published in: IEEE Transactions on Dielectrics and Electrical Insulation

More information

Bandwidth limitations in current mode and voltage mode integrated feedback amplifiers

Bandwidth limitations in current mode and voltage mode integrated feedback amplifiers Downloaded from orbit.dtu.dk on: Oct 13, 2018 Bandwidth limitations in current mode and voltage mode integrated feedback amplifiers Bruun, Erik Published in: Proceedings of the IEEE International Symposium

More information

Effect of loop delay on phase margin of first-order and second-order control loops Bergmans, J.W.M.

Effect of loop delay on phase margin of first-order and second-order control loops Bergmans, J.W.M. Effect of loop delay on phase margin of first-order and second-order control loops Bergmans, J.W.M. Published in: IEEE Transactions on Circuits and Systems. II, Analog and Digital Signal Processing DOI:

More information

A Multifrequency Radiometer System

A Multifrequency Radiometer System Downloaded from orbit.dtu.dk on: Dec 17, 2017 A Multifrequency Radiometer System Skou, Niels Published in: Microwave Conference, 1977. 7th European Link to article, DOI: 10.1109/EUMA.1977.332460 Publication

More information

A 2GHz, 17% tuning range quadrature CMOS VCO with high figure of merit and 0.6 phase error

A 2GHz, 17% tuning range quadrature CMOS VCO with high figure of merit and 0.6 phase error Downloaded from orbit.dtu.dk on: Dec 17, 2017 A 2GHz, 17% tuning range quadrature CMOS VCO with high figure of merit and 0.6 phase error Andreani, Pietro Published in: Proceedings of the 28th European

More information

Decreasing the commutation failure frequency in HVDC transmission systems

Decreasing the commutation failure frequency in HVDC transmission systems Downloaded from orbit.dtu.dk on: Dec 06, 2017 Decreasing the commutation failure frequency in HVDC transmission systems Hansen (retired June, 2000), Arne; Havemann (retired June, 2000), Henrik Published

More information

THE PROPAGATION OF PARTIAL DISCHARGE PULSES IN A HIGH VOLTAGE CABLE

THE PROPAGATION OF PARTIAL DISCHARGE PULSES IN A HIGH VOLTAGE CABLE THE PROPAGATION OF PARTIAL DISCHARGE PULSES IN A HIGH VOLTAGE CABLE Z.Liu, B.T.Phung, T.R.Blackburn and R.E.James School of Electrical Engineering and Telecommuniications University of New South Wales

More information

Separation of common and differential mode conducted emission: Power combiner/splitters

Separation of common and differential mode conducted emission: Power combiner/splitters Downloaded from orbit.dtu.dk on: Aug 18, 18 Separation of common and differential mode conducted emission: Power combiner/splitters Andersen, Michael A. E.; Nielsen, Dennis; Thomsen, Ole Cornelius; Andersen,

More information

Beyond the switch: explicit and implicit interaction with light Aliakseyeu, D.; Meerbeek, B.W.; Mason, J.; Lucero, A.; Ozcelebi, T.; Pihlajaniemi, H.

Beyond the switch: explicit and implicit interaction with light Aliakseyeu, D.; Meerbeek, B.W.; Mason, J.; Lucero, A.; Ozcelebi, T.; Pihlajaniemi, H. Beyond the switch: explicit and implicit interaction with light Aliakseyeu, D.; Meerbeek, B.W.; Mason, J.; Lucero, A.; Ozcelebi, T.; Pihlajaniemi, H. Published in: 8th Nordic Conference on Human-Computer

More information

IEEE (2016) (2016). IEEE.,

IEEE (2016) (2016). IEEE., Corr, Edward and Siew, W. H. and Zhao, Weijia (16) Long term testing and analysis of dielectric samples under DC excitation. In: IEEE Electrical Insulation Conference (16). IEEE., This version is available

More information

The University of New South Wales. School of Electrical Engineering and Telecommunications. High Voltage Systems ELEC9712. Appendix Partial Discharge

The University of New South Wales. School of Electrical Engineering and Telecommunications. High Voltage Systems ELEC9712. Appendix Partial Discharge The University of New South Wales School of Electrical Engineering and Telecommunications High Voltage Systems ELEC9712 Appendix Partial Discharge Content Introduction Quantities measured Test circuits

More information

Published in: Proceedings of the 10th International Conference on Power Quality and Utilization (EPQU 2009), Lodz, Poland

Published in: Proceedings of the 10th International Conference on Power Quality and Utilization (EPQU 2009), Lodz, Poland Harmonic current interaction at a low voltage customer's installations Bhattacharyya, S.; Myrzik, J.M.A.; Kling, W.L.; Cobben, J.F.G.; Casteren, van, J. Published in: Proceedings of the 10th International

More information

A high-speed CMOS current op amp for very low supply voltage operation

A high-speed CMOS current op amp for very low supply voltage operation Downloaded from orbit.dtu.dk on: Mar 31, 2018 A high-speed CMOS current op amp for very low supply voltage operation Bruun, Erik Published in: Proceedings of the IEEE International Symposium on Circuits

More information

Robotizing workforce in future built environments

Robotizing workforce in future built environments Robotizing workforce in future built environments Maas, G.J.; van Gassel, F.J.M. Published: 01/01/2014 Document Version Accepted manuscript including changes made at the peer-review stage Please check

More information

Document Version Publisher s PDF, also known as Version of Record (includes final page, issue and volume numbers)

Document Version Publisher s PDF, also known as Version of Record (includes final page, issue and volume numbers) Characterization of the relative permittivity and homogeneity of liquid crystal polymer (LCP) in the 60 GHz band Huang, M.; Kazim, M.I.; Herben, M.H.A.J. Published in: Proc. Cost 2100 TD (10) 12031, Bologna,

More information

Analysis and design of lumped element Marchand baluns

Analysis and design of lumped element Marchand baluns Downloaded from orbit.dtu.d on: Mar 14, 218 Analysis and design of lumped element Marchand baluns Johansen, Tom Keinice; Krozer, Vitor Published in: 17th International Conference on Microwaves, Radar and

More information

A multi-band single-loop PLL frequency synthesizer with dynamically-controlled switched tuning VCO Samuel, A.M.; Pineda de Gyvez, J.

A multi-band single-loop PLL frequency synthesizer with dynamically-controlled switched tuning VCO Samuel, A.M.; Pineda de Gyvez, J. A multi-band single-loop PLL frequency synthesizer with dynamically-controlled switched tuning VCO Samuel, A.M.; Pineda de Gyvez, J. Published in: Proceedings of the 43rd IEEE Midwest Symposium on Circuits

More information

Log-periodic dipole antenna with low cross-polarization

Log-periodic dipole antenna with low cross-polarization Downloaded from orbit.dtu.dk on: Feb 13, 2018 Log-periodic dipole antenna with low cross-polarization Pivnenko, Sergey Published in: Proceedings of the European Conference on Antennas and Propagation Link

More information

Published in: Proceedings of the 2016 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES)

Published in: Proceedings of the 2016 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES) Aalborg Universitet Voltage Feedback based Harmonic Compensation for an Offshore Wind Power Plant Chaudhary, Sanjay K.; Lascu, Cristian Vaslie; Teodorescu, Remus; Kocewiak, ukasz Published in: Proceedings

More information

Slot waveguide microring modulator on InP membrane

Slot waveguide microring modulator on InP membrane Andreou, S.; Millan Mejia, A.J.; Smit, M.K.; van der Tol, J.J.G.M. Published in: Proceedings of the 20th Annual Symposium of the IEEE Photonics Benelux Chapter, 26-27 November 2015, Brussels, Belgium Published:

More information

Document Version Publisher s PDF, also known as Version of Record (includes final page, issue and volume numbers)

Document Version Publisher s PDF, also known as Version of Record (includes final page, issue and volume numbers) A 2V Iductorless Receiver Front-End for Multi-Standard Wireless Applications Vidojkovic, V; Sanduleanu, MAT; van der Tang, JD; Baltus, PGM; van Roermund, AHM Published in: IEEE Radio and Wireless Symposium,

More information

High Gain K-Band Patch Antenna for Low Earth Orbit Interlink Between Nanosatellites Squadrito, Paolo; Zhang, Shuai; Pedersen, Gert F.

High Gain K-Band Patch Antenna for Low Earth Orbit Interlink Between Nanosatellites Squadrito, Paolo; Zhang, Shuai; Pedersen, Gert F. Aalborg Universitet High Gain K-Band Patch Antenna for Low Earth Orbit Interlink Between Nanosatellites Squadrito, Paolo; Zhang, Shuai; Pedersen, Gert F. Published in: 12th European Conference on Antenna

More information

The machining process : cutting

The machining process : cutting The machining process : cutting Citation for published version (APA): Hutchins, P. (1988). The machining process : cutting. (TH Eindhoven. Afd. Werktuigbouwkunde, Vakgroep Produktietechnologie : WPB; Vol.

More information

Study of High Voltage AC Underground Cable Systems Silva, Filipe Miguel Faria da; Bak, Claus Leth; Wiechowski, Wojciech T.

Study of High Voltage AC Underground Cable Systems Silva, Filipe Miguel Faria da; Bak, Claus Leth; Wiechowski, Wojciech T. Aalborg Universitet Study of High Voltage AC Underground Cable Systems Silva, Filipe Miguel Faria da; Bak, Claus Leth; Wiechowski, Wojciech T. Published in: Proceedings of the Danish PhD Seminar on Detailed

More information

Practical aspects of PD localization for long length Power Cables

Practical aspects of PD localization for long length Power Cables Practical aspects of PD localization for long length Power Cables M. Wild, S. Tenbohlen University of Stuttgart Stuttgart, Germany manuel.wild@ieh.uni-stuttgart.de E. Gulski, R. Jongen onsite hv technology

More information

System grounding of wind farm medium voltage cable grids

System grounding of wind farm medium voltage cable grids Downloaded from orbit.dtu.dk on: Apr 23, 2018 System grounding of wind farm medium voltage cable grids Hansen, Peter; Østergaard, Jacob; Christiansen, Jan S. Published in: NWPC 2007 Publication date: 2007

More information

Characteristic mode based pattern reconfigurable antenna for mobile handset

Characteristic mode based pattern reconfigurable antenna for mobile handset Characteristic mode based pattern reconfigurable antenna for mobile handset Li, Hui; Ma, Rui; Chountalas, John; Lau, Buon Kiong Published in: European Conference on Antennas and Propagation (EuCAP), 2015

More information

Microwave Radiometer Linearity Measured by Simple Means

Microwave Radiometer Linearity Measured by Simple Means Downloaded from orbit.dtu.dk on: Sep 27, 2018 Microwave Radiometer Linearity Measured by Simple Means Skou, Niels Published in: Proceedings of IEEE International Geoscience and Remote Sensing Symposium

More information

A triple-mode continuous-time sigma delta modulator with switched-capacitor feedback DAC for a GSM- EDGE/CDMA2000/UMTS Receiver van Veldhoven, R.H.M.

A triple-mode continuous-time sigma delta modulator with switched-capacitor feedback DAC for a GSM- EDGE/CDMA2000/UMTS Receiver van Veldhoven, R.H.M. A triple-mode continuous-time sigma delta modulator with switched-capacitor feedback DAC for a GSM- EDGE/CDMA2000/UMTS Receiver van Veldhoven, R.H.M. Published in: IEEE Journal of Solid-State Circuits

More information

A 60 GHz Digitally Controlled Phase Shifter in CMOS

A 60 GHz Digitally Controlled Phase Shifter in CMOS A 6 GHz Digitally Controlled Phase Shifter in Yu, Y.; Baltus, P.G.M.; van Roermund, A.H.M.; Jeurissen, D.; Grauw, de, A.; Heijden, van der, E.; Pijper, Ralf Published in: European Solid State Circuits

More information

D Proposal for condition monitoring method for cable network Pertti Pakonen, Bashir Siddiqui, Antti Hilden, 19 February, 2015

D Proposal for condition monitoring method for cable network Pertti Pakonen, Bashir Siddiqui, Antti Hilden, 19 February, 2015 D2.3.24 Proposal for condition monitoring method for cable network Pertti Pakonen, Bashir Siddiqui, Antti Hilden, 19 February, 2015 1 Contents of the presentation Goal of condition monitoring tests Priorization

More information

The half-bridge SiC-MOSFET switching cell : implementation in a three phase motor drive Baskurt, F.; Boynov, K.; Lomonova, E.

The half-bridge SiC-MOSFET switching cell : implementation in a three phase motor drive Baskurt, F.; Boynov, K.; Lomonova, E. The half-bridge SiC-MOSFET switching cell : implementation in a three phase motor drive Baskurt, F.; Boynov, K.; Lomonova, E. Published: 01/01/2017 Document Version Accepted manuscript including changes

More information

Development of methods for numerical error correction of machine tools : interim report no. 2 Spaan, H.A.M.; Schellekens, P.H.J.

Development of methods for numerical error correction of machine tools : interim report no. 2 Spaan, H.A.M.; Schellekens, P.H.J. Development of methods for numerical error correction of machine tools : interim report no. 2 Spaan, H.A.M.; Schellekens, P.H.J. Published: 01/01/1990 Document Version Publisher s PDF, also known as Version

More information

Resonances in Collection Grids of Offshore Wind Farms

Resonances in Collection Grids of Offshore Wind Farms Downloaded from orbit.dtu.dk on: Dec 20, 2017 Resonances in Collection Grids of Offshore Wind Farms Holdyk, Andrzej Publication date: 2013 Link back to DTU Orbit Citation (APA): Holdyk, A. (2013). Resonances

More information

Coherence and time-frequency analysis of impulse voltage and current measurements

Coherence and time-frequency analysis of impulse voltage and current measurements Coherence and time-frequency analysis of impulse voltage and current measurements Jelena Dikun Electrical Engineering Department, Klaipeda University, Klaipeda, Lithuania Emel Onal Electrical Engineering

More information

Self-Resonant Electrically Small Loop Antennas for Hearing-Aids Application

Self-Resonant Electrically Small Loop Antennas for Hearing-Aids Application Downloaded from orbit.dtu.dk on: Jul 5, 218 Self-Resonant Electrically Small Loop Antennas for Hearing-Aids Application Zhang, Jiaying; Breinbjerg, Olav Published in: EuCAP 21 Publication date: 21 Link

More information

On the creation of standards for interaction between real robots and virtual worlds

On the creation of standards for interaction between real robots and virtual worlds On the creation of standards for interaction between real robots and virtual worlds Citation for published version (APA): Juarez Cordova, A. G., Bartneck, C., & Feijs, L. M. G. (2009). On the creation

More information

Cross-polarization and sidelobe suppression in dual linear polarization antenna arrays

Cross-polarization and sidelobe suppression in dual linear polarization antenna arrays Downloaded from orbit.dtu.dk on: Jun 06, 2018 Cross-polarization and sidelobe suppression in dual linear polarization antenna arrays Woelders, Kim; Granholm, Johan Published in: I E E E Transactions on

More information

Measurements of the Distorted No-load Current of a 60/20 kv, 6 MVA Power Transformer Søgaard, Kim; Bak, Claus Leth; Wiechowski, Wojciech Tomasz

Measurements of the Distorted No-load Current of a 60/20 kv, 6 MVA Power Transformer Søgaard, Kim; Bak, Claus Leth; Wiechowski, Wojciech Tomasz Aalborg Universitet Measurements of the Distorted No-load Current of a 60/20 kv, 6 MVA Power Transformer Søgaard, Kim; Bak, Claus Leth; Wiechowski, Wojciech Tomasz Publication date: 2005 Document Version

More information

Investigation of PD Detection on XLPE Cables

Investigation of PD Detection on XLPE Cables Investigation of PD Detection on XLPE Cables Hio Nam O, T.R. Blackburn and B.T. Phung School of Electrical Engineering and Telecommunications The University New South Wales, Australia Abstract- The insulation

More information

Partial Discharge Measurement and Monitoring on High Voltage XLPE Cables

Partial Discharge Measurement and Monitoring on High Voltage XLPE Cables 21, rue d Artois, F-75008 PARIS AUCKLAND 2013 http : //www.cigre.org Partial Discharge Measurement and Monitoring on High Voltage XLPE Cables Michael Krüger, Rene Hummel, Stefan Böhler, OMICRON Austria

More information

PULSE-SEQUENCE ANALYSIS OF PARTIAL DISCHARGES IN POWER TRANSFORMERS

PULSE-SEQUENCE ANALYSIS OF PARTIAL DISCHARGES IN POWER TRANSFORMERS PULSE-SEQUENCE ANALYSIS OF PARTIAL DISCHARGES IN POWER TRANSFORMERS Anne Pfeffer 1*, Stefan Tenbohlen 1 and Stefan Kornhuber 2 1 Institute of Power Transmission and High Voltage Technology, Pfaffenwaldring

More information

Aalborg Universitet. Published in: th European Conference on Antennas and Propagation (EuCAP) Publication date: 2017

Aalborg Universitet. Published in: th European Conference on Antennas and Propagation (EuCAP) Publication date: 2017 Aalborg Universitet Combining and Ground Plane Tuning to Efficiently Cover Tv White Spaces on Handsets Barrio, Samantha Caporal Del; Hejselbæk, Johannes; Morris, Art; Pedersen, Gert F. Published in: 2017

More information

A Novel SFG Structure for C-T Highpass Filters

A Novel SFG Structure for C-T Highpass Filters Downloaded from orbit.dtu.dk on: Dec 17, 2017 A Novel SFG Structure for C-T Highpass Filters Nielsen, Ivan Riis Published in: Proceedings of the Eighteenth European Solid-State Circuits Conference Publication

More information

NJ. ISBN (2017) , /URSIGASS

NJ. ISBN (2017) , /URSIGASS Jaber, A. and Lazaridis, P. and Saeed, B. and Mather, P. and Vieira, M. F. Q. and Atkinson, R. and Tachtatzis, C. and Iorkyase, E. and Judd, M. and Glover, I. A. (2017) Diagnostic potential of free-space

More information

Compact microstrip bandpass filter with tunable notch

Compact microstrip bandpass filter with tunable notch Downloaded from orbit.dtu.dk on: Feb 16, 2018 Compact microstrip bandpass filter with tunable notch Christensen, Silas; Zhurbenko, Vitaliy; Johansen, Tom Keinicke Published in: Proceedings of 2014 20th

More information

A Practical FPGA-Based LUT-Predistortion Technology For Switch-Mode Power Amplifier Linearization Cerasani, Umberto; Le Moullec, Yannick; Tong, Tian

A Practical FPGA-Based LUT-Predistortion Technology For Switch-Mode Power Amplifier Linearization Cerasani, Umberto; Le Moullec, Yannick; Tong, Tian Aalborg Universitet A Practical FPGA-Based LUT-Predistortion Technology For Switch-Mode Power Amplifier Linearization Cerasani, Umberto; Le Moullec, Yannick; Tong, Tian Published in: NORCHIP, 2009 DOI

More information

PD Monitoring of MV/HV Power Cables December 2016

PD Monitoring of MV/HV Power Cables December 2016 PD Monitoring of MV/HV Power Cables December 216 Malcolm Seltzer-Grant m.seltzer-grant@hvpd.co.uk Introduction to HVPD Our global presence Introduction to HVPD Ltd HVPD are experts in the growing industry

More information

Evaluation of the Danish Safety by Design in Construction Framework (SDCF)

Evaluation of the Danish Safety by Design in Construction Framework (SDCF) Downloaded from orbit.dtu.dk on: Dec 15, 2017 Evaluation of the Danish Safety by Design in Construction Framework (SDCF) Schultz, Casper Siebken; Jørgensen, Kirsten Publication date: 2015 Link back to

More information

Impact of the size of the hearing aid on the mobile phone near fields Bonev, Ivan Bonev; Franek, Ondrej; Pedersen, Gert F.

Impact of the size of the hearing aid on the mobile phone near fields Bonev, Ivan Bonev; Franek, Ondrej; Pedersen, Gert F. Aalborg Universitet Impact of the size of the hearing aid on the mobile phone near fields Bonev, Ivan Bonev; Franek, Ondrej; Pedersen, Gert F. Published in: Progress In Electromagnetics Research Symposium

More information

A GHz Quadrature ring oscillator for optical receivers van der Tang, J.D.; Kasperkovitz, D.; van Roermund, A.H.M.

A GHz Quadrature ring oscillator for optical receivers van der Tang, J.D.; Kasperkovitz, D.; van Roermund, A.H.M. A 9.8-11.5-GHz Quadrature ring oscillator for optical receivers van der Tang, J.D.; Kasperkovitz, D.; van Roermund, A.H.M. Published in: IEEE Journal of Solid-State Circuits DOI: 10.1109/4.987097 Published:

More information

Investigations of advanced folded reflectarray antennas

Investigations of advanced folded reflectarray antennas Investigations of advanced folded reflectarray antennas Dieter, S.; Li, J.; Keyrouz, S.; Menzel, W. Published in: Proceedings of the 21 International Conference on Electromagnetics in Advanced Applications

More information

Use of the method of progressive means in the analysis of errors in a line standard measurement Schellekens, P.H.J.; Amaradasa, A.A.

Use of the method of progressive means in the analysis of errors in a line standard measurement Schellekens, P.H.J.; Amaradasa, A.A. Use of the method of progressive means in the analysis of errors in a line standard measurement Schellekens, P.H.J.; Amaradasa, A.A. Published: 0/0/97 Document Version Publisher s PDF, also known as Version

More information

Long lengths transmission power cables on-site testing up to 500 kv by damped AC voltages

Long lengths transmission power cables on-site testing up to 500 kv by damped AC voltages Long lengths transmission power cables on-site testing up to 500 kv by damped AC voltages Paul P. SEITZ, Ben QUAK, Seitz Instruments AG, Niederrohrdorf, Switzerland, pps@seitz-instruments.ch Edward GULSKI,

More information

NOVEL METHOD FOR ON-SITE TESTING AND DIAGNOSIS OF TRANSMISSION CABELS UP TO 250KV

NOVEL METHOD FOR ON-SITE TESTING AND DIAGNOSIS OF TRANSMISSION CABELS UP TO 250KV NOVEL METHOD FOR ON-SITE TESTING AND DIAGNOSIS OF TRANSMISSION CABELS UP TO 250KV Paul P. SEITZ, Seitz Instruments AG, (Switzerland), pps@seitz-instruments.ch Ben QUAK, Seitz Instruments AG, (Switzerland),

More information

A COMPARISON OF AC AND DC PARTIAL DISCHARGE ACTIVITY IN POLYMERIC CABLE INSULATION *

A COMPARISON OF AC AND DC PARTIAL DISCHARGE ACTIVITY IN POLYMERIC CABLE INSULATION * Morris, E.A. and Siew, W.H. (2018) A comparison of AC and DC partial discharge activity in polymeric cable insulation. In: 2017 IEEE 21st International Conference on Pulsed Power (PPC). IEEE, Piscataway,

More information

Transient calibration of electric field sensors

Transient calibration of electric field sensors Transient calibration of electric field sensors M D Judd University of Strathclyde Glasgow, UK Abstract An electric field sensor calibration system that operates in the time-domain is described and its

More information

Published in: Proceedings of the th European Conference on Power Electronics and Applications (EPE'15-ECCE Europe)

Published in: Proceedings of the th European Conference on Power Electronics and Applications (EPE'15-ECCE Europe) Aalborg Universitet Switching speed limitations of high power IGBT modules Incau, Bogdan Ioan; Trintis, Ionut; Munk-Nielsen, Stig Published in: Proceedings of the 215 17th European Conference on Power

More information

A Component-Reduced Zero-Voltage Switching Three-Level DC-DC Converter Qin, Zian; Pang, Ying; Wang, Huai; Blaabjerg, Frede

A Component-Reduced Zero-Voltage Switching Three-Level DC-DC Converter Qin, Zian; Pang, Ying; Wang, Huai; Blaabjerg, Frede alborg Universitet Component-Reduced Zero-Voltage Switching Three-Level DC-DC Converter Qin, Zian; Pang, Ying; Wang, Huai; laabjerg, Frede Published in: Proceedings of IECON 16 - nd nnual Conference of

More information

Dynamic range of low-voltage cascode current mirrors

Dynamic range of low-voltage cascode current mirrors Downloaded from orbit.dtu.dk on: Sep 04, 2018 Dynamic range of low-voltage cascode current mirrors Bruun, Erik; Shah, Peter Jivan Published in: Proceedings of the IEEE International Symposium on Circuits

More information

Petersson, Mikael; Årzén, Karl-Erik; Sandberg, Henrik; de Maré, Lena

Petersson, Mikael; Årzén, Karl-Erik; Sandberg, Henrik; de Maré, Lena Implementation of a Tool for Control Structure Assessment Petersson, Mikael; Årzén, Karl-Erik; Sandberg, Henrik; de Maré, Lena Published in: Proceedings of the 15th IFAC world congress Link to publication

More information