1. Introduction: STATCOMs in wind power applications
|
|
- Randell Barrett
- 6 years ago
- Views:
Transcription
1 Improved STATCOM Opertion Under Trnsient Disturnces for Wind Power Applictions Ion EtxeerriOtdui (1), Uni Viscrret (1), Izskun Zmkon (2), Betriz Arenl Redondo (3), Jvier Iiricu (4) (1) IKERLANIK4 Technology Reserch Centre, Apdo. 146, E2.5 Mondrgón (Spin) Tel: , FAX: , (2) OLDAR Electrónic, S.A., Brrio Bsuntz, 2, E4814 Igorre (Spin) Tel: , Fx: , (3) JEMA, Pseo del Circuito nº1, E216 LsrteOri (Spin) Tel: , Fx: (4) Eólics de Euskdi, Prque Tecnológico de Álv, E6, oficin 39, 151, Miñno (Spin) Tel: , Fx: , Acknowledgements This work ws supported in prt y the Bsque Regionl Government in the context of the Project SICRE: Sistem de Inyección de Corriente Rectiv pr Instlciones de Producción Eléctric en Régimen Especil. Keywords STATCOM, Converter Control, Wind Energy. Astrct This pper presents n optimized STATCOM control for wind power pplictions. The trnsient ehvior of fixedspeed wind frms cn e improved y injecting lrge mounts of rective power during the fult recovery. This ppliction requires high dynmic converter, which must lso e cple of working under trnsient unlnced conditions. Here, sttionry control structure is proposed, which is sed on resonnt regultors nd DFT synchroniztion lgorithm, which llows n optimized rective power injection during voltge dips occurred in the grid. The proposed structure is vlidted experimentlly using reduced scle STATCOM prototype, showing tht it is well dpted for the concerned ppliction. 1. Introduction: STATCOMs in wind power pplictions The vision of the contriution of Sttic VAr Compenstion devices in wind power pplictions hs evolved in the lst few yers. Initilly, t the end of the 199s, it ws ssumed tht their min function ws wind power qulity improvement, i.e., fixing unity output power fctor nd thus reducing voltge drops, flicker, nd electricl losses in the network during norml opertion [1]. An exmple of this viewpoint is the 8 MVAr experimentl STATCOM tht ws instlled in 1998 in the Rejsy Hede (Denmrk) wind frm [2] in the context of Europen Commission funded project [3]. Lter on, with the development nd expnsion of douly fed induction genertors nd the generlized prctice of connecting the wind frms in sufficiently strong networks, the interest of using Sttic VAr Compenstion devices in wind frms hs een flgging. However, with the puliction of new nd more restrictive interconnection requirements they re currently drwing incresing interest [4], [5], [6], [7], [8]. Until recently wind frms were required to disconnect from the grid in cse of disturnce, losing therefore their genertion cpility t criticl moment for the system opertion. EPE 27 Alorg ISBN : P.1
2 Consequently, newly developed GridCodes [9] request them Low Voltge Ride Through (LVRT) cpility: they must e le to withstnd without disconnection voltge disturnces ove certin limit chrcteristic (defined in terms of depth nd durtion) s shown in Figure V (pu) PCC Time (s) 15 Fig. 1. Fult ridethrough chrcteristic specified y the Spnish grid opertor [9]. STATCOMs cn e employed to improve fixedspeed wind frm ehvior during the most criticl phse of griddisturnce, the voltge recovery fter the clering, y injecting the rective power required y the genertors nd voiding this wy the voltge drop provoked y the sorption of this power from the grid. Let us nlyze in detil the fult ehvior of fixedspeed wind frms. Voltge dips hve doule effect on fixedspeed wind turines: electricl nd mechnicl. The min electricl effect is the demgnetiztion of the rotor while the most significnt mechnicl one is the rotor speed increse [1]. These effects re oservle from the eginning of the dip until few seconds fter its recovery (see Fig. 2, where.2 p.u. 3 phse sg is pplied to 36 MW fixedspeed wind frm from t =.5s to t =.6s using PSCAD/EMTDC). The terminl voltge dip provokes the demgnetiztion of the sttor flux. However, the rotor flux cnnot decrese instntneously nd therefore the mchine current goes through hrd trnsient (it my rech severl p.u.) in which it delivers rective power to the network. Fig. 2. Terminl voltge, sttor RMS current nd rotor speed of fixedspeed wind turine fter.1 s shortcircuit. In ddition, the ctive power exported to the grid is significntly reduced during the fult while the input mechnicl power from the wind turine is lmost constnt (the wind speed cn e considered to e unvried nd the mechnicl power limittion systems require non negligile time pitch controlor rottionl speed increse stll control to rect). Therefore the genertor will ccelerte during the shortcircuit in order to mechniclly store the energy excess. The chieved speed must e lower thn the mximum tolerle speed to void the disconnection of the genertor. EPE 27 Alorg ISBN : P.2
3 After the clering, the genertor consumes lrge mounts of rective power due to its mgnetiztion nd to the increse of the mchine slip during the fult. This power consumption mkes it difficult the recovery of the terminl voltge. If the voltge does not recover fst enough, the mchine will continue ccelerting until its finl disconnection. The est wy to void voltge dip derived prolems on wind genertors is to control the connection point voltge y compensting voltge dips nd protecting the fcility from ny voltge imperfection. This cn e done y using series power electronic compenstor Dynmic Voltge Restorer (DVR) which injects the necessry voltge in the system in order to keep the genertor voltge constnt [11]. However, this compenstor requires n ctive power sorption cpility during fults (in order to del with the power generted y the wind frm tht cn not e exported to the grid) which its min drwck. If shunt compenstor (SVC or STATCOM) is used, little cn e done during the fult in order to improve the voltge due to the huge mount of power tht would e necessry. Nevertheless, the shunt compenstor cn e used to improve the ehvior of the system fter the clering of the fult voiding the voltge drop provoked y the sorption of this power from the grid. This is the most widely proposed compenstorsed solution for the ridethrough cpility improvement of fixedspeed wind turines [4], [5]. However, s the STATCOM will hve to e operted during unlnced fults it will hve to e designed for this kind of opertion, optimizing the rective power injected into the grid t ny condition. Therefore the min scope of the pper is to propose n improved control structure in order to optimize STATCOM opertion under trnsient disturnces for wind power pplictions 2. STATCOM opertion under unlnced trnsient disturnces In this section the opertion of generic vector current controlled PWM converter (see Figure 3) will e nlyzed under unlnced trnsient conditions. The controller includes negligile dynmics PLL (it does not rect during trnsient disturnces) in order to reject hrmonic nd negtive sequence phse disturnces. In ddition, it is considered tht the converter is not ffected y zerosequence voltge disturnces ecuse of the presence of zerosequence locking trnsformers [12]. PLL θ i R, L v VSC i DC v DC e e e c i c i v v c C Lod s c 3/2 αβ / dq e αβ 3/2 i αβ αβ / dq θ θ v c * v αβ * PWM 2/3 dq / αβ V DC Control e dq i dq v dq * Current Control i d * i q * Fig. 3. Generic Single Reference Frme Vector Current Controller. The first nd immedite effect of voltge dip is the decrese of the exchnged power nd lso of the mximum exchngele power. In generl the converter controller will try to keep the exchnged power constnt nd therefore current mplitude will increse. In ddition, phse ngle shifts () provoke synchroniztion error during fults (due to the negligile PLL dynmics). This error my hve different impct on the opertion depending on the considered ppliction. Let us nlyze 2 possile gridconnected pplictions: rectifier (PF = 1) nd STATCOM (PF = ). EPE 27 Alorg ISBN : P.3
4 Rectifier (PF = 1): synchroniztion errors results in n undesired rective component, I dq, s well s decrese of the ctive current, I dd, I = sin dq I' d ( ) ( ) I dd = I' d cos where I d is the desired ctive current (see Fig. 4 left, where dq is the rel synchronous reference frme nd dq is the estimted one). Therefore, there will e power fctor error: ( ) PF = 1 cos (2) If the system contins power feedck loop (mesured phse per phse) exchnged power error cn e detected nd used for phse ngle jump estimtion, minimizing the error in fult stedystte. STATCOM (PF = ): synchroniztion errors results in n undesired ctive component: ( ) I qd = I' q sin (3) where I q is the desired rective current (see Fig. 4 right, where dq is the rel synchronous reference frme nd dq is the estimted one). However, s the converter hs no ctive power exchnge cpility (other thn for power losses compenstion purposes) the us voltge controller will rect modifying the ctive current reference (I d ) until its rel ctive projection (I dd ) compenstes the erroneously injected ctive current (I qd ). 1 cos I q = I' q Iqq Idq = (4) cos This error increses very rpidly with the phse ngle shift vlue, reching considerle vlue (1% increse) for the mximum considered jump (6 ) [12]. In this cse the error cn lso e minimized during the time etween the voltge dip eginning nd end using the exchnged power error. (1) q q' q q' I mx I mx d I qq I q d I dd d' I d I dq I qd d' I d I dd I dq Fig. 4. Impct of phse ngle jump on rectifier (left) nd STATCOM (right) opertion. Besides the converter current, DC us voltge my lso e distorted during disturnces. In cse of lnced voltge dip, DC us voltge trnsients cn e oserved oth t the eginning nd t the end of the disturnce, ut there re no stedystte oscilltions during the disturnce due to the power lnce etween phses. The cse of unlnced voltge dips is different. They re chrcterized y decrese of the positive voltge sequence nd the ppernce of negtive voltge sequence. Thus, generlly power unlnce will tke plce etween phses, which will led to doule grid frequency oscilltions in the DC us (in ddition to fult eginning nd end trnsients). In ddition, there my lso e phse ngle EPE 27 Alorg ISBN : P.4
5 unlnce etween difference phses. However, nd supposing tht there is zerosequence locking trnsformer etween the fult origin nd the converter, there will lwys e some kind of symmetry etween phses. As result, undesired power components due to phse ngle unlnces re compensted etween phses nd do not ffect DC us voltge. Figure 5 shows this compenstion phenomenon for pure rective opertion mode nd 2 different voltge sgs (I d = I cd ). I d I q I d I I q I ' ' I I c I cd c' c' c I c I cq I cd I cq Fig. 5. Compenstion of undesired current components in unlnced voltge sgs (pure rective opertion nd 2 different voltge sgs). In ddition, depending on the implemented controller, converter current my lso e distorted nd unlnced. The min cuse of current distortion is the DC us voltge hrmonic propgtion through the current reference generted y the DC us voltge loop, nd therefore it cn e esily voided y filtering this reference. Concerning current unlnces, they re originted y the incpcity of the control to completely reject negtive sequence disturnces, nd therefore they cn e voided y improving this controller feture. Summrizing, the min effects of trnsient voltge dips on the opertion of power converters re or mye: 1. Decrese of the mximum power exchnge etween the converter nd the grid. 2. Power fctor nd/or current mplitude error (in cse of phse ngle jump). 3. DC us voltge oscilltions (t the eginning nd t the end of the disturnce s well s sttionry oscilltions in cse of power unlnce). 4. Unlnce nd distortion of the converter currents. 3. Proposed control structure In the cse of the ove mentioned wind power ppliction, it is crucil to get the most out of the converter, injecting the mximum ville rective power in order to optimize the rting of the converter. An optimized PWM current controller is composed of three min locks: ) Higher level control loop: the ojective of this control loop is to generte n optimized current reference for the converter tking into ccount ctul grid conditions. ) Current control structure: the ojective of this loop is to otin good trnsient nd stedysttes responses, nd therefore it must present pproprite ndwidth chrcteristics. c) Synchroniztion: the purpose of this lock is to estimte the voltge grid instntneous phse in order to generte n optiml current reference. I c EPE 27 Alorg ISBN : P.5
6 ) Higher level control loop: current reference genertion In the considered ppliction, the ojective of the converter is to inject the mximum ville rective power in order to minimize voltge drops t the wind frm connection point fter fult clering. Therefore, the mximum current reference must e defined y the higher control loop. The direct ppliction of mximum mplitude current reference t ech of the phses my result on homopolr current injection (in cse of phse unlnces t the grid) nd if this component is directly removed, the solution my not e optiml from the mximum power injection viewpoint. Thus, the proposed strtegy is sed on the principle of injecting higher current in those phses with higher residul voltge nd it is implemented s follows (see Figure 6). The proposed strtegy is independent with respect to the nture of the converter output power (ctive nd rective) nd therefore pure ctive injection exmple is presented t this figure, ecuse of simplicity resons. As it cn e seen, the three currents re injected in phse with distured grid voltges, injecting the mximum current in the phse with the mximum residul voltge (). ' ' φ v e p c I φ i = φ v e φ ic = φ vc p e c I p I c c φ vc c c' Fig. 6. Mximum power injection for pure ctive opertion. Grid voltge (left) nd injected current nd power (right). Current Phse Angle: The phse ngle of ech of the phses is derived from the desired power fctor: c' ϕ PF 1 P ref = tn ; φ In = φvn ϕpf (5) Qref Current Amplitude: The sum of the three phse converter currents must e zero (no homopolr sequence) nd their mplitudes must e in ccordnce with residul voltge mplitudes of ech of the phses (i.e. the mximum currents must e injected in the phses with the mximum residul voltges s shown in Figure 6). The phses with mximum nd minimum residul voltges will e determined y the disturnce chrcteriztion module. Supposing for instnce tht E = E mx then I = I mx, the mplitude of the other two currents will e clculted s follows in order to gurntee null zerosequence current (tking into ccount the possiility of phse unlnce), y ssuming tht the sum of ll current components must e zero oth in the rel nd in the imginry projections: I I c = I I = cos φ cos φ i i sin φ sin φ sin φi I sin φ ic ic ic sin φ sin φ sin φ i i i cos φ cos φ ic ic (6) EPE 27 Alorg ISBN : P.6
7 ) Current control structure Vector current control structures hve een widely proposed for the control of threephse AC systems ecuse of their good stedystte fetures (they hve theoreticlly infinite gin t the rotting frequency nd they re thus le to completely eliminte the error t this frequency). However in the lst yers new fmily of controllers hs een introduced s n interesting sttic lterntive to the use of synchronous PI controllers [13], [14], [15] for AC current control pplictions (oth in single nd three phse systems): resonnt regultors (lso known s generlized integrtors). These regultors re generlly mde up of proportionl nd n integrtor term, which contins resonnt pole imed t otining n infinite gin t the resonnce frequency (ω ): 2 ki s CR ( s) = k p 2 (7) s ω 2 This regultor cn e esily deduced from the sttionry frme equivlent regultor of synchronous frme PI y uilding its rel equivlent regultor: ki ki CIG ( s) = k p (8) s jω s jω Thus, the resonnt regultor presents symmetric frequency response nd n infinite gin for oth positive nd negtive sequences of the selected frequency. Consequently it is especilly well fitted for unlnced pplictions like the one considered in this pper. The following figure presents the lock digrm of the proposed sttionry frme current controller. In ddition to the resonnt current regultor mentioned efore, the system contins PI for the DC us voltge control nd zerosequence component removing function. V c Wind Frm 3 x single phse synchroniztion I c L cos sin cos sin cos sin ϕ ϕ ϕc I qref I dref Active Rective Homopolr Extrction Icref Resonnt Regultors Vcref PWM s c PI Vccref Vcc Fig. 7. Proposed improved current control structure. c) Synchroniztion In order to implement the ove presented sclr control structure it is necessry to use singlephse synchroniztion systems with sufficient dynmics. The dynmics otined with conventionl singlephse synchroniztion techniques re quite limited (typiclly etween 5 nd 1ms) ecuse of the dely introduced y the genertion of virtul threephse system nd the need for eliminting the 1Hz component originted y the phse detector lock. Thus, in this pper reltime DFT (Discrete Fourier Trnsform) hs een used. The implemented rel time Expression used to clculte fundmentl voltge mplitude nd instntneous phse is for ech of the grid phses is: 1 2 N 1 = v( n) N n= 2 π n j ( ) N V e (9) EPE 27 Alorg ISBN : P.7
8 4. Implementtion nd Experimentl results The experimentl tests hve een crried out t testench uilt t the IKERLANIK4 Technologicl Reserch Center in Mondrgón (Spin). The testench (see Figure 8) is siclly composed of voltge source converter connected to progrmmle grid ( commercil Profline genertor nd zero sequence locking trnsformer) through grid connection inductive filter. The min prmeters of the testench re presented in Tle I. Profline e' Trnsformer e L v VSC V DC e' e' c e e c v v c C Progrmmle Grid s c dspace Controller Bord Fig. 8. Scheme of the testench used for the experimentl improved control strtegy vlidtion. This testench permits to vlidte the trnsient rective power injection cpility of the proposed STATCOM control structure, which s it hs een shown in the literture my e crucil for the grid response improvement of fixed speed wind frms [8]. A D Type voltge sg hs een considered (ccording to [12]), compring the otined experimentl results with simultion results (otined with Mtl/Simulink). TABLE I. Min Prmeters of the Experimentl TestBench Symol Mgnitude Vlue V DC DC us voltge 4V C DC us cpcitor 235µF L Grid connection filter inductnce 3mH r Grid connection filter resistnce 2mΩ f s Smpling Frequency 5kHz f sw Switching Frequency 5kHz E Trnsformer secondry voltge 22 V LL E Trnsformer primry voltge 38 V LL I NOM Converter nominl current 15A Experimentl nd simultion results re presented in Figures 913. As it cn e oserved, the control structure permits to optimize the injected rective power y injecting higher current in the phses with higher residul voltges, with reltively smooth current trnsients (Figures 1 nd 11). Before the disturnce the converter is soring rective power, ut once the disturnce strted it chnges rpidly its opertion mode in order to generte the mximum ville rective power (Figure 12). Finlly, Figure 13 shows how DC us voltge oscilltions increse during the trnsient due to the converter three phse power unlnce (which is necessry to optimize the mount of injected power) Tensiones (V) 5 5 Tensiones (V) Fig. 9. Voltge t the converter connection point. Experimentl (left) nd simultion (right). EPE 27 Alorg ISBN : P.8
9 Corrientes (A) 5 Corrientes (A) Fig. 1. Converter current t the disturnce eginning. Experimentl (left) nd simultion (right) Corrientes (A) Corrientes (A) Fig. 11. Converter current t the disturnce end. Experimentl (left) nd simultion (right) Potencis (W VAr) Potencis (W VAr) Fig. 12. Converter ctive nd rective power (one phse). Experimentl (left) nd simultion (right) Vus (V) 5 Vus (V) Fig. 13. Converter DC us voltge. Experimentl (left) nd simultion (right). EPE 27 Alorg ISBN : P.9
10 5. Conclusion This pper presents n optimized STATCOM control for wind power pplictions. The min fetures of this control re: The use of 3 singlephse synchroniztion functions in order to del not only with mplitude unlnces ut lso with phse unlnces. The use of 3 singlephse controllers sed on resonnt regultors. Seprted genertion of ctive nd rective references which re then djusted in order to otin current reference without zerosequence component. The proposed structure hs een vlidted experimentlly nd in simultion, using reduced scle STATCOM prototype, showing tht it is well dpted for the concerned ppliction. 6. References [1] SdSoud Z, Liso M, Eknyke J, Jenkins N, Strc G. The ppliction of STATCOMS to wind frms. IEE Proceedings Genertion Trnsmission nd Distriution, Vol. 145, No 5, Sep.1998, pp [2] K. H. Sorink, N. Jenkins, F. C. A. Schettler, J. Pedersen, K. O. H. Pedersen, nd K. Bergmnn, Rective power compenstion of 24 MW wind frm using 12pulse voltge source converter, in Proc. CIGRÉ Int. Conf. Lrge High Voltge Electric Systems, [3] Improvement of Wind Frm Output Power Qulity Using Advnced Sttic VAr Compenstors NonNucler Energy R&D Component (JOULE III), , Project Reference: JOR [4] Aten M, Mrtinez J, Crtwright P.J. Fult Recovery of Wind frm with FixedSpeed Induction Genertors using STATCOM. Wind Engineering, Vol. 29, No. 4, 25. [5] Xuegung W, Atputhrjh A, Chngjing Z, Jenkins N. Appliction of Sttic Rective Power Compenstor (STATCOM) nd Dynmic Brking Resistor (DBR) for the Stility Enhncement of Lrge Wind Frm. Wind Engineering, Vol. 27, No. 2, 23. [6] W. Freits, A. Morelto, W. Xu, nd F. Sto, Impcts of c genertors nd DSTATCOM devices on the dynmic performnce of distriution systems, IEEE Trns. Power Delivery, vol. 2, no. 2, pp , Apr. 25. [7] C. Chompooinwi, C. Yingvivtnpong, K. Methpryoon, nd W. J. Lee, Rective compenstion techniques to improve the ridethrough cpility of wind turine during disturnce, IEEE Trns. Ind. Applict., vol. 41, pp , MyJun. 25. [8] H. Gztñg, I. EtxeerriOtdui, D. Ocnsu nd S. Bch, RelTime Anlysis of the Trnsient Response Improvement of FixedSpeed Wind Frms y Using ReducedScle STATCOM Prototype. IEEE Trnsctions on Power Systems, Vol. 22, No. 2, My 27. [9] PO Voltge Sg Response Requirements of Wind Power Fcilities, Opertion Procedure (in Spnish) Spnish System Opertor (REE), 26. [1] R. Grünum, P. Hlvrsson, D. Lrsson, nd P. R. Jones, Conditioning of power grids serving offshore wind frms sed on synchronous genertors, in Proc. IEE PEMD 24, 2nd Int. Conf. Power Electronics, Mchines nd Drives, Edinurgh, U.K., 24. [11] H. Gztñg, I. EtxeerriOtdui, S. Bch, D. Roye, FixedSpeed Wind Frm Opertion Improvement y Using DVR Devices IEEE ISIE 7, 27, Vigo, Spin. [12] M. H.J. Bollen, Understnding Power Qulity Prolems. Voltge Sgs nd Interruptions, IEEE Press Series on Power Engineering, ISBN , 2. [13] M. Bojrup, P. Krlsson, M. Alküll, nd L. Gertmr, A multiple rotting integrtor controller for ctive filters, in Proc. EPE Conf., Lusnne, Switzerlnd, 1999, CDROM. [14] X. Yun, J. Allmeling, W. Merk, nd H. Stemmler, Sttionry frme generlized integrtors for current control of ctive power filters with zero stedy stte error for current hrmonics of concern under unlnced nd distorted opertion conditions, in Proc. IEEEIAS Annu. Meeting, Conf. Rec., Rom, Itly, 2, pp [15] I. EtxeerriOtdui, U. Viscrret, M. Cllero, A. Rufer nd S. Bch, New Optimized PWM VSC Control Structures nd Strtegies Under Unlnced Voltge Trnsients, IEEE Trnsctions on Industril Electronics. Accepted in My 27, witing for puliction. EPE 27 Alorg ISBN : P.1
POWER QUALITY IMPROVEMENT BY SRF BASED CONTROL USING DYNAMIC VOLTAGE RESTORER (DVR)
Interntionl Journl of Electricl Engineering & Technology (IJEET) Volume 9, Issue 1, Jn-Fe 2018, pp. 51 57, rticle ID: IJEET_09_01_005 ville online t http://www.ieme.com/ijeet/issues.sp?jtype=ijeet&vtype=9&itype=1
More informationSynchronous Generator Line Synchronization
Synchronous Genertor Line Synchroniztion 1 Synchronous Genertor Line Synchroniztion Introduction One issue in power genertion is synchronous genertor strting. Typiclly, synchronous genertor is connected
More informationSynchronous Machine Parameter Measurement
Synchronous Mchine Prmeter Mesurement 1 Synchronous Mchine Prmeter Mesurement Introduction Wound field synchronous mchines re mostly used for power genertion but lso re well suited for motor pplictions
More informationMixed CMOS PTL Adders
Anis do XXVI Congresso d SBC WCOMPA l I Workshop de Computção e Aplicções 14 20 de julho de 2006 Cmpo Grnde, MS Mixed CMOS PTL Adders Déor Mott, Reginldo d N. Tvres Engenhri em Sistems Digitis Universidde
More informationCHAPTER 3 AMPLIFIER DESIGN TECHNIQUES
CHAPTER 3 AMPLIFIER DEIGN TECHNIQUE 3.0 Introduction olid-stte microwve mplifiers ply n importnt role in communiction where it hs different pplictions, including low noise, high gin, nd high power mplifiers.
More information(1) Non-linear system
Liner vs. non-liner systems in impednce mesurements I INTRODUCTION Electrochemicl Impednce Spectroscopy (EIS) is n interesting tool devoted to the study of liner systems. However, electrochemicl systems
More informationThree-Phase Synchronous Machines The synchronous machine can be used to operate as: 1. Synchronous motors 2. Synchronous generators (Alternator)
Three-Phse Synchronous Mchines The synchronous mchine cn be used to operte s: 1. Synchronous motors 2. Synchronous genertors (Alterntor) Synchronous genertor is lso referred to s lterntor since it genertes
More informationISSCC 2006 / SESSION 21 / ADVANCED CLOCKING, LOGIC AND SIGNALING TECHNIQUES / 21.5
21.5 A 1.1GHz Chrge-Recovery Logic Visvesh Sthe, Jung-Ying Chueh, Mrios Ppefthymiou University of Michign, Ann Aror, MI Boost Logic is chrge-recovery circuit fmily cple of operting t GHz-clss frequencies
More informationSynchronous Machine Parameter Measurement
Synchronous Mchine Prmeter Mesurement 1 Synchronous Mchine Prmeter Mesurement Introduction Wound field synchronous mchines re mostly used for power genertion but lso re well suited for motor pplictions
More informationFuzzy Logic Controller for Three Phase PWM AC-DC Converter
Journl of Electrotechnology, Electricl Engineering nd Mngement (2017) Vol. 1, Number 1 Clusius Scientific Press, Cnd Fuzzy Logic Controller for Three Phse PWM AC-DC Converter Min Muhmmd Kml1,, Husn Ali2,b
More informationDiscontinued AN6262N, AN6263N. (planed maintenance type, maintenance type, planed discontinued typed, discontinued type)
ICs for Cssette, Cssette Deck ANN, ANN Puse Detection s of Rdio Cssette, Cssette Deck Overview The ANN nd the ANN re the puse detection integrted circuits which select the progrm on the cssette tpe. In
More informationDESIGN OF CONTINUOUS LAG COMPENSATORS
DESIGN OF CONTINUOUS LAG COMPENSATORS J. Pulusová, L. Körösi, M. Dúbrvská Institute of Robotics nd Cybernetics, Slovk University of Technology, Fculty of Electricl Engineering nd Informtion Technology
More informationUniversity of North Carolina-Charlotte Department of Electrical and Computer Engineering ECGR 4143/5195 Electrical Machinery Fall 2009
Problem 1: Using DC Mchine University o North Crolin-Chrlotte Deprtment o Electricl nd Computer Engineering ECGR 4143/5195 Electricl Mchinery Fll 2009 Problem Set 4 Due: Thursdy October 8 Suggested Reding:
More informationPostprint. This is the accepted version of a paper presented at IEEE PES General Meeting.
http://www.div-portl.org Postprint This is the ccepted version of pper presented t IEEE PES Generl Meeting. Cittion for the originl published pper: Mhmood, F., Hooshyr, H., Vnfretti, L. (217) Sensitivity
More informationREVIEW QUESTIONS. Figure For Review Question Figure For Review Question Figure For Review Question 10.2.
HAPTE 0 Sinusoidl Stedy-Stte Anlysis 42 EVIEW QUESTIONS 0. The voltge cross the cpcitor in Fig. 0.43 is: () 5 0 V () 7.07 45 V (c) 7.07 45 V (d) 5 45 V Ω 0.5 efer to the circuit in Fig. 0.47 nd oserve
More informationPower System Stability Enhancement By UPFC Based Power Oscillation Damping Controller
Power System Stility Enhncement By Bsed Power Oscilltion Dmping r. Sntosh Kumr ripthi Associte Professor, Deprtment of Electricl Engineering, B.N. College of Engineering & echnology, Lucnow, Uttr Prdesh,
More informationSimulation of Transformer Based Z-Source Inverter to Obtain High Voltage Boost Ability
Interntionl Journl of cience, Engineering nd Technology Reserch (IJETR), olume 4, Issue 1, October 15 imultion of Trnsformer Bsed Z-ource Inverter to Obtin High oltge Boost Ability A.hnmugpriy 1, M.Ishwry
More informationCompared to generators DC MOTORS. Back e.m.f. Back e.m.f. Example. Example. The construction of a d.c. motor is the same as a d.c. generator.
Compred to genertors DC MOTORS Prepred by Engr. JP Timol Reference: Electricl nd Electronic Principles nd Technology The construction of d.c. motor is the sme s d.c. genertor. the generted e.m.f. is less
More informationExperiment 3: Non-Ideal Operational Amplifiers
Experiment 3: Non-Idel Opertionl Amplifiers Fll 2009 Equivlent Circuits The bsic ssumptions for n idel opertionl mplifier re n infinite differentil gin ( d ), n infinite input resistnce (R i ), zero output
More informationModule 9. DC Machines. Version 2 EE IIT, Kharagpur
Module 9 DC Mchines Version EE IIT, Khrgpur esson 40 osses, Efficiency nd Testing of D.C. Mchines Version EE IIT, Khrgpur Contents 40 osses, efficiency nd testing of D.C. mchines (esson-40) 4 40.1 Gols
More informationA Novel Back EMF Zero Crossing Detection of Brushless DC Motor Based on PWM
A ovel Bck EMF Zero Crossing Detection of Brushless DC Motor Bsed on PWM Zhu Bo-peng Wei Hi-feng School of Electricl nd Informtion, Jingsu niversity of Science nd Technology, Zhenjing 1003 Chin) Abstrct:
More informationExperiment 3: Non-Ideal Operational Amplifiers
Experiment 3: Non-Idel Opertionl Amplifiers 9/11/06 Equivlent Circuits The bsic ssumptions for n idel opertionl mplifier re n infinite differentil gin ( d ), n infinite input resistnce (R i ), zero output
More informationSafety Relay Unit. Main contacts Auxiliary contact Number of input channels Rated voltage Model Category. possible 24 VAC/VDC G9SA-501.
Sfety Rely Unit The Series Offers Complete Line-up of Compct Units. Four kinds of -mm wide Units re ville: A -pole model, -pole model, nd models with poles nd OFF-dely poles, s well s Two-hnd ler. Simple
More informationLab 8. Speed Control of a D.C. motor. The Motor Drive
Lb 8. Speed Control of D.C. motor The Motor Drive Motor Speed Control Project 1. Generte PWM wveform 2. Amplify the wveform to drive the motor 3. Mesure motor speed 4. Mesure motor prmeters 5. Control
More informationABB STOTZ-KONTAKT. ABB i-bus EIB Current Module SM/S Intelligent Installation Systems. User Manual SM/S In = 16 A AC Un = 230 V AC
User Mnul ntelligent nstlltion Systems A B 1 2 3 4 5 6 7 8 30 ma 30 ma n = AC Un = 230 V AC 30 ma 9 10 11 12 C ABB STOTZ-KONTAKT Appliction Softwre Current Vlue Threshold/1 Contents Pge 1 Device Chrcteristics...
More informationA. Extraction of FPSC of PCC Voltages
Discrete SOGI Bsed Control of Solr Photovoltic Integrted Unified Power Qulity Conditioner Schin Devssy, Student Memer, IEEE Electricl Engineering Dept. IIT Delhi New Delhi1116, Indi Emil:schindevssy@gmil.com
More informationExperiment 3: The research of Thevenin theorem
Experiment 3: The reserch of Thevenin theorem 1. Purpose ) Vlidte Thevenin theorem; ) Mster the methods to mesure the equivlent prmeters of liner twoterminl ctive. c) Study the conditions of the mximum
More informationExperimental Application of H Output-Feedback Controller on Two Links of SCARA Robot
INTERNATIONAL JOURNAL OF CONTROL, AUTOMATION AND SYSTEMS VOL.5 NO. Jnury 6 ISSN 65-877 (Print) ISSN 65-885 (Online) http://www.reserchpu.org/journl/jc/jc.html Experimentl Appliction of H Output-Feedck
More informationOpen Access A Novel Parallel Current-sharing Control Method of Switch Power Supply
Send Orders for Reprints to reprints@enthmscience.e 170 The Open Electricl & Electronic Engineering Journl, 2014, 8, 170-177 Open Access A Novel Prllel Current-shring Control Method of Switch Power Supply
More informationThe Discussion of this exercise covers the following points:
Exercise 4 Bttery Chrging Methods EXERCISE OBJECTIVE When you hve completed this exercise, you will be fmilir with the different chrging methods nd chrge-control techniques commonly used when chrging Ni-MI
More informationMulti-beam antennas in a broadband wireless access system
Multi-em ntenns in rodnd wireless ccess system Ulrik Engström, Mrtin Johnsson, nders Derneryd nd jörn Johnnisson ntenn Reserch Center Ericsson Reserch Ericsson SE-4 84 Mölndl Sweden E-mil: ulrik.engstrom@ericsson.com,
More informationThis is a repository copy of Design Guidelines for Fractional Slot Multi-Phase Modular Permanent Magnet Machines.
This is repository copy of Design Guidelines for Frctionl Slot Multi-Phse Modulr Permnent Mgnet Mchines. White Rose Reserch Online URL for this pper: http://eprints.whiterose.c.uk/110126/ Version: Accepted
More informationTo provide data transmission in indoor
Hittite Journl of Science nd Engineering, 2018, 5 (1) 25-29 ISSN NUMBER: 2148-4171 DOI: 10.17350/HJSE19030000074 A New Demodultor For Inverse Pulse Position Modultion Technique Mehmet Sönmez Osmniye Korkut
More informationAlternating-Current Circuits
chpter 33 Alternting-Current Circuits 33.1 AC Sources 33.2 esistors in n AC Circuit 33.3 Inductors in n AC Circuit 33.4 Cpcitors in n AC Circuit 33.5 The LC Series Circuit 33.6 Power in n AC Circuit 33.7
More informationKirchhoff s Rules. Kirchhoff s Laws. Kirchhoff s Rules. Kirchhoff s Laws. Practice. Understanding SPH4UW. Kirchhoff s Voltage Rule (KVR):
SPH4UW Kirchhoff s ules Kirchhoff s oltge ule (K): Sum of voltge drops round loop is zero. Kirchhoff s Lws Kirchhoff s Current ule (KC): Current going in equls current coming out. Kirchhoff s ules etween
More informationEET 438a Automatic Control Systems Technology Laboratory 5 Control of a Separately Excited DC Machine
EE 438 Automtic Control Systems echnology bortory 5 Control of Seprtely Excited DC Mchine Objective: Apply proportionl controller to n electromechnicl system nd observe the effects tht feedbck control
More informationControl of high-frequency AC link electronic transformer
Control of high-frequency AC link electronic trnsformer H. Krishnswmi nd V. Rmnrynn Astrct: An isolted high-frequency link AC/AC converter is termed n electronic trnsformer. The electronic trnsformer hs
More informationSection 2.2 PWM converter driven DC motor drives
Section 2.2 PWM converter driven DC motor drives 2.2.1 Introduction Controlled power supply for electric drives re obtined mostly by converting the mins AC supply. Power electronic converter circuits employing
More informationLecture 16: Four Quadrant operation of DC Drive (or) TYPE E Four Quadrant chopper Fed Drive: Operation
Lecture 16: Four Qudrnt opertion of DC Drive (or) TYPE E Four Qudrnt chopper Fed Drive: Opertion The rmture current I is either positive or negtive (flow in to or wy from rmture) the rmture voltge is lso
More informationModule D1 Introduction to Distribution Systems
D ntroduction to Distriution Systems 30 Module D ntroduction to Distriution Systems Primry Author: Gerld B. Shele, ow Stte University Emil Address: gshele@istte.edu Prerequisite Competencies: Stedy Stte
More informationExercise 1-1. The Sine Wave EXERCISE OBJECTIVE DISCUSSION OUTLINE. Relationship between a rotating phasor and a sine wave DISCUSSION
Exercise 1-1 The Sine Wve EXERCISE OBJECTIVE When you hve completed this exercise, you will be fmilir with the notion of sine wve nd how it cn be expressed s phsor rotting round the center of circle. You
More informationSoft switched DC-DC PWM Converters
Soft switched DC-DC PWM Converters Mr.M. Prthp Rju (), Dr. A. Jy Lkshmi () Abstrct This pper presents n upgrded soft switching technique- zero current trnsition (ZCT), which gives better turn off chrcteristics
More informationExperiment 8 Series DC Motor (II)
Ojectives To control the speed of loded series dc motor y chnging rmture voltge. To control the speed of loded series dc motor y dding resistnce in prllel with the rmture circuit. To control the speed
More informationImplementation of Different Architectures of Forward 4x4 Integer DCT For H.264/AVC Encoder
Implementtion of Different Architectures of Forwrd 4x4 Integer DCT For H.64/AVC Encoder Bunji Antoinette Ringnyu, Ali Tngel, Emre Krulut 3 Koceli University, Institute of Science nd Technology, Koceli,
More informationThree-Phase NPC Inverter Using Three-Phase Coupled Inductor
ThreePhse NPC Inverter Using ThreePhse Coupled Inductor Romeu Husmnn 1, Rodrigo d Silv 2 nd Ivo Brbi 2 1 Deprtment of Electricl nd Telecommuniction Engineering, University of Blumenu FURB Blumenu SC Brzil,
More informationDSP-based PLL-controlled khz 20 kw highfrequency induction heating system for surface hardening and welding applications
DSP-sed PLL-controlled 5 1 khz 2 kw highfrequency induction heting system for surfce hrdening nd welding pplictions N.S. Byındır, O. K.ukrer nd M. Ykup Astrct: A digitl signl processor (DSP)-sed phselocked
More informationINSTITUTE OF AERONAUTICAL ENGINEERING (Autonomous) Dundigal, Hyderabad
Hll Ticket No Question Pper Code: AEC009 INSTITUTE OF AERONAUTICAL ENGINEERING (Autonomous) Dundigl, Hyderd - 500 043 MODEL QUESTION PAPER Four Yer B.Tech V Semester End Exmintions, Novemer - 2018 Regultions:
More informationDataflow Language Model. DataFlow Models. Applications of Dataflow. Dataflow Languages. Kahn process networks. A Kahn Process (1)
The slides contin revisited mterils from: Peter Mrwedel, TU Dortmund Lothr Thiele, ETH Zurich Frnk Vhid, University of liforni, Riverside Dtflow Lnguge Model Drsticlly different wy of looking t computtion:
More informationDynamic Power Quality Compensator with an Adaptive Shunt Hybrid Filter
Interntionl Journl of Electronics nd Drive System (IJPEDS) Vol. 4, No. 4, December 2014, pp. 508~516 ISSN: 2088-8694 508 Dynmic Qulity Compenstor with n dptive Shunt Hybrid Filter Sindhu M R, Mnjul G Nir,
More informationMath Circles Finite Automata Question Sheet 3 (Solutions)
Mth Circles Finite Automt Question Sheet 3 (Solutions) Nickols Rollick nrollick@uwterloo.c Novemer 2, 28 Note: These solutions my give you the nswers to ll the prolems, ut they usully won t tell you how
More informationTHE STUDY OF INFLUENCE CORE MATERIALS ON TECHNOLOGICAL PROPERTIES OF UNIVERSAL BENTONITE MOULDING MATERIALS. Matej BEZNÁK, Vladimír HANZEN, Ján VRABEC
THE STUDY OF INFLUENCE CORE MATERIALS ON TECHNOLOGICAL PROPERTIES OF UNIVERSAL BENTONITE MOULDING MATERIALS Mtej BEZNÁK, Vldimír HANZEN, Ján VRABEC Authors: Mtej Beznák, Assoc. Prof. PhD., Vldimír Hnzen,
More informationSequential Logic (2) Synchronous vs Asynchronous Sequential Circuit. Clock Signal. Synchronous Sequential Circuits. FSM Overview 9/10/12
9//2 Sequentil (2) ENGG5 st Semester, 22 Dr. Hden So Deprtment of Electricl nd Electronic Engineering http://www.eee.hku.hk/~engg5 Snchronous vs Asnchronous Sequentil Circuit This Course snchronous Sequentil
More informationCVM-B100 CVM-B150. Power analyzers for panel
Power nlyzers CVM-150 Power nlyzers for pnel Description The nd CVM-150 units re pnel mounted three-phse power nlyzers (dimensions: x nd 144x144 mm, respectively). oth offer 4-qudrnt mesurement (consumption
More informationA Development of Earthing-Resistance-Estimation Instrument
A Development of Erthing-Resistnce-Estimtion Instrument HITOSHI KIJIMA Abstrct: - Whenever erth construction work is done, the implnted number nd depth of electrodes hve to be estimted in order to obtin
More informationElectronic Circuits I - Tutorial 03 Diode Applications I
Electronic Circuits I - Tutoril 03 Diode Applictions I -1 / 9 - T & F # Question 1 A diode cn conduct current in two directions with equl ese. F 2 When reverse-bised, diode idelly ppers s short. F 3 A
More informationEnhancement of Electric Power Quality using Unified Power Quality Conditioning System
Interntionl onference on Glol Trends in Engineering, Technology nd Mngement (IGTETM-216) Enhncement of Electric Power Qulity using Unified Power Qulity onditioning System 1 Mr. Sidhhnt N. Ptil, 2 Mr. Suhs
More information(CATALYST GROUP) B"sic Electric"l Engineering
(CATALYST GROUP) B"sic Electric"l Engineering 1. Kirchhoff s current l"w st"tes th"t (") net current flow "t the junction is positive (b) Hebr"ic sum of the currents meeting "t the junction is zero (c)
More informationVOLTAGE SAG MITIGATION IN LV AND HV PLATFORM USING SMES BASED DVR
Vol. 2, No. 4, pril 2013, PP: 131-137, ville online www.ijretr.org Reserch rticle VOLTGE SG MITIGTION IN LV ND HV PLTFORM USING SMES SED DVR S. Deep 1, Mrs. K. Eskki shenglog 2 1.M.E Scholr,,EEE Deprtment,Fx-Engineering
More information5 I. T cu2. T use in modem computing systems, it is desirable to. A Comparison of Half-Bridge Resonant Converter Topologies
74 EEE TRANSACTONS ON POER ELECTRONCS, VOL. 3, NO. 2, APRL 988 A Comprison of Hlf-Bridge Resonnt Converter Topologies Abstrct-The hlf-bridge series-resonnt, prllel-resonnt, nd combintion series-prllel
More informationFPGA Based Five-Phase Sinusoidal PWM Generator
22 IEEE Interntionl Conference on Power nd Energy (PECon), 25 Decemer 22, Kot Kinlu Sh, Mlysi FPGA Bsed FivePhse Sinusoidl PWM Genertor Tole Sutikno Dept. of Electricl Engineering Universits Ahmd Dhln
More informationELECTRIC POWER QUALITY
ELECTRC POWER QUALTY Dr. L.N Tripthy Associte Professor Electricl Engineering Deprtment GT, Srng, Odish Pge of 58/L N Tripthy ELECTRC POWER QUALTY. Wht is Power Qulity? Any power problem mnifested in the
More informationDevice installation. AFR 1xx - Feature Description of the Smart Load. AFR1xx 145 % 200 %
KM systems, s.r.o. Dr. M. Horákové 559, 460 06 Lierec 7, Czech Repulic tel. +420 485 130 314, fx +420 482 736 896 emil : km@km.cz, url : www.km.cz sturtion of the mgnetic circuit of the VT. This often
More informationHigh Speed On-Chip Interconnects: Trade offs in Passive Termination
High Speed On-Chip Interconnects: Trde offs in Pssive Termintion Rj Prihr University of Rochester, NY, USA prihr@ece.rochester.edu Abstrct In this pper, severl pssive termintion schemes for high speed
More informationModal Analysis as a Means of Explaining the Oscillatory Behaviour of Transformers
Modl Anlysis s Mens of Explining the Oscilltory Behviour of Trnsformers Modl nlysis hs proved to e n outstnding id in the clcultion nd mesurement of nturl oscill tions of trnsformers. With modl prmeters
More information& Y Connected resistors, Light emitting diode.
& Y Connected resistors, Light emitting diode. Experiment # 02 Ojectives: To get some hndson experience with the physicl instruments. To investigte the equivlent resistors, nd Y connected resistors, nd
More informationDesign And Implementation Of Luo Converter For Electric Vehicle Applications
Design And Implementtion Of Luo Converter For Electric Vehicle Applictions A.Mnikndn #1, N.Vdivel #2 ME (Power Electronics nd Drives) Deprtment of Electricl nd Electronics Engineering Sri Shkthi Institute
More informationStudy on SLT calibration method of 2-port waveguide DUT
Interntionl Conference on Advnced Electronic cience nd Technology (AET 206) tudy on LT clibrtion method of 2-port wveguide DUT Wenqing Luo, Anyong Hu, Ki Liu nd Xi Chen chool of Electronics nd Informtion
More informationCHAPTER 2 LITERATURE STUDY
CHAPTER LITERATURE STUDY. Introduction Multipliction involves two bsic opertions: the genertion of the prtil products nd their ccumultion. Therefore, there re two possible wys to speed up the multipliction:
More informationCarbon Composition Resistors
Dimensions Cron Composition Resistors Rtings nd Dimensions Type L Specifiction Limit nd Performnce d D Derting Curve 8 6 4 (/, w) Test procedures, sequence of test, etc., refer to MIL-STD D nd JIS-C-5.
More informationMODELING AND SIMULATION OF DYNAMIC VOLTAGE RESTORER FOR POWER QUALITY IMPROVEMENT
FUTO Journl Series (FUTOJNLS), 2015, VOL. 1, Issue 1 50 MODELING ND SIMULTION OF DYNMI VOLTGE RESTORER FOR POWER QULITY IMPROVEMENT bstrct Uzoechi LO nd Obikor M Deprtment of Electricl/Electronic Engineering,
More informationNew Control Strategy for Three-Phase Grid-Connected LCL Inverters without a Phase-Locked Loop
Jornl of Power Electronics, Vol. 3, No. 3, My 3 487 JPE 337 http://dx.doi.org/.63/jpe.3.3.3.487 New Control Strtegy for ThreePhse GridConnected LCL Inverters withot PhseLocked Loop Lin Zho, Ming Yng, Qing
More informationModeling of Inverter Fed Five Phase Induction Motor using V/f Control Technique
Interntionl Journl of Current Engineering nd Technology E-ISSN 2277 4106, P-ISSN 2347 161 201INPRESSCO, All Rights Reserved Avilble t http://inpressco.com/ctegory/ijcet Reserch Article Modeling of Inverter
More informationDynamic Harmonic Modeling and Analysis of VSC-HVDC Systems
AU Journl of Electricl Engineering AU J. Elec. Eng., 49()(27)3-38 DOI:.226/eej.26.86 Dynmic Hrmonic Modeling nd Anlysis of VSC-HVDC Systems E. Krmi*, M. Mdrigl2, G. B. Ghrehpetin 2 Deprtment of Electricl
More informationSection Thyristor converter driven DC motor drive
Section.3 - Thyristor converter driven DC motor drive.3.1 Introduction Controllble AC-DC converters using thyristors re perhps the most efficient nd most robust power converters for use in DC motor drives.
More informationPerformance Comparison of Sliding Mode Control and Conventional PI Controller for Speed Control of Separately Excited Direct Current Motors
Journl of Science nd Technology Vol. 13, No. 2 Engineering nd Computer Sciences (ECS) Performnce Comprison of Sliding Mode Control nd Conventionl PI Controller for Speed Control of Seprtely Excited Direct
More informationHomework #1 due Monday at 6pm. White drop box in Student Lounge on the second floor of Cory. Tuesday labs cancelled next week
Announcements Homework #1 due Mondy t 6pm White drop ox in Student Lounge on the second floor of Cory Tuesdy ls cncelled next week Attend your other l slot Books on reserve in Bechtel Hmley, 2 nd nd 3
More informationNevery electronic device, since all the semiconductor
Proceedings of Interntionl Joint Conference on Neurl Networks, Orlndo, Florid, USA, August 12-17, 2007 A Self-tuning for Rel-time Voltge Regultion Weiming Li, Xio-Hu Yu Abstrct In this reserch, self-tuning
More informationSystem-Wide Harmonic Mitigation in a Diesel Electric Ship by Model Predictive Control
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS System-Wide Hrmonic Mitigtion in Diesel Electric Ship by Model Predictive Control Espen Skjong, Jon Are Suul, Member, IEEE, Atle Rygg, Tor Arne Johnsen, Senior
More informationModeling of Conduction and Switching Losses in Three-Phase Asymmetric Multi-Level Cascaded Inverter
Proceedings of the 5th WEA nt. onf. on Power ystems nd Electromgnetic omptibility, orfu, Greece, August 23-25, 2005 (pp176-181) Modeling of onduction nd witching Losses in Three-Phse Asymmetric Multi-Level
More informationApplication of Feed Forward Neural Network to Differential Protection of Turbogenerator
16th NATIONAL POWER SYSTEMS CONFERENCE, 15th-17th DECEMBER, 21 464 Appliction of Feed Forwrd Neurl Network to Differentil Protection of Turbogenertor Amrit Sinh Dept. of Electricl Engg., Ntionl Institute
More informationApplication Note. Differential Amplifier
Appliction Note AN367 Differentil Amplifier Author: Dve n Ess Associted Project: Yes Associted Prt Fmily: CY8C9x66, CY8C7x43, CY8C4x3A PSoC Designer ersion: 4. SP3 Abstrct For mny sensing pplictions, desirble
More informationImproved Ensemble Empirical Mode Decomposition and its Applications to Gearbox Fault Signal Processing
IJCSI Interntionl Journl of Computer Science Issues, Vol. 9, Issue, No, Novemer ISSN (Online): 9- www.ijcsi.org 9 Improved Ensemle Empiricl Mode Decomposition nd its Applictions to Gerox Fult Signl Processing
More informationCOMPARISON OF THE EFFECT OF FILTER DESIGNS ON THE TOTAL HARMONIC DISTORTION IN THREE-PHASE STAND-ALONE PHOTOVOLTAIC SYSTEMS
O. 0, NO., NOEMBER 05 ISSN 89-6608 ARPN Journl of Engineering nd Applied Sciences 006-05 Asin Reserch Pulishing Network (ARPN). All rights reserved. www.rpnjournls.com OMPARISON OF THE EFFET OF FITER ESIGNS
More informationLocalization of Latent Image in Heterophase AgBr(I) Tabular Microcrystals
Interntionl ymposium on ilver Hlide Technology Locliztion of Ltent Imge in Heterophse AgBr(I) Tulr Microcrystls Elen V. Prosvirkin, Aigul B. Aishev, Timothy A. Lrichev, Boris A. echkrev Kemerovo tte University,
More informationSolutions to exercise 1 in ETS052 Computer Communication
Solutions to exercise in TS52 Computer Communiction 23 Septemer, 23 If it occupies millisecond = 3 seconds, then second is occupied y 3 = 3 its = kps. kps If it occupies 2 microseconds = 2 6 seconds, then
More informationPractical implementation of a half-bridge SRM converter for low power applications
The 18 th Ntionl onference on Electricl Drives NAE 2016 Prcticl implementtion of hlfridge SRM converter for low power pplictions Tieriu Rusu 1, Petre Dorel Teodosescu 1, Adrinornel Pop 2 1 Fculty of Electric
More informationTransformerless Three-Level DC-DC Buck Converter with a High Step-Down Conversion Ratio
7 Journl of Power Electronics, Vol. 13, No. 1, Jnury 213 JPE 13-1-8 http://dx.doi.org/1.6113/jpe.213.13.1.7 rnsformerless hree-level DC-DC Buck Converter with High Step-Down Conversion tio Yun Zhng, Xing-to
More informationADVANCED MODULATION TECHNIQUES FOR NEUTRAL- POINT CLAMPED THREE-LEVEL INVERTERS IN AUTOMOTIVE APPLICATIONS
ADVANCED MODULAION ECHNIQUES FOR NEURAL- POIN CLAMPED HREE-LEVEL INVERERS IN AUOMOIVE APPLICAIONS NAZAK SOLEIMANPOUR A hesis In the Deprtment of Electricl nd Computer Engineering Presented in Prtil Fulfilment
More informationDesign and implementation of a high-speed bit-serial SFQ adder based on the binary decision diagram
INSTITUTE OFPHYSICS PUBLISHING Supercond. Sci. Technol. 16 (23) 1497 152 SUPERCONDUCTORSCIENCE AND TECHNOLOGY PII: S953-248(3)67111-3 Design nd implementtion of high-speed it-seril SFQ dder sed on the
More informationInvestigation of propagation of partial discharges in power transformers and techniques for locating the discharge
Investigtion of propgtion of prtil dischrges in power trnsformers nd techniques for locting the dischrge S.N. Hettiwtte, Z.D. Wng nd P.A. Crossley Astrct: The loction of prtil dischrges in power trnsformer
More informationResearch on a Compound Control Strategy of Three-Phase
Reserch on Compound Control Strtegy of ThreePhse Inverter for Unblnced Lods Gili Yue, Wen Li, Ken Li College of Electricl nd Control Engineering, Xi n University of Science nd Technology, Xi n 7143, Chin
More informationPRO LIGNO Vol. 11 N pp
THE INFLUENCE OF THE TOOL POINT ANGLE AND FEED RATE ON THE DELAMINATION AT DRILLING OF PRE-LAMINATED PARTICLEBOARD Mihi ISPAS Prof.dr.eng. Trnsilvni University of Brsov Fculty of Wood Engineering Address:
More informationOn the Description of Communications Between Software Components with UML
On the Description of Communictions Between Softwre Components with UML Zhiwei An Dennis Peters Fculty of Engineering nd Applied Science Memoril University of Newfoundlnd St. John s NL A1B 3X5 zhiwei@engr.mun.c
More informationMagnetic monopole field exposed by electrons
Mgnetic monopole field exposed y electrons A. Béché, R. Vn Boxem, G. Vn Tendeloo, nd J. Vereeck EMAT, University of Antwerp, Groenenorgerln 171, 22 Antwerp, Belgium Opticl xis Opticl xis Needle Smple Needle
More information10.4 AREAS AND LENGTHS IN POLAR COORDINATES
65 CHAPTER PARAMETRIC EQUATINS AND PLAR CRDINATES.4 AREAS AND LENGTHS IN PLAR CRDINATES In this section we develop the formul for the re of region whose oundry is given y polr eqution. We need to use the
More informationArea-Time Efficient Digit-Serial-Serial Two s Complement Multiplier
Are-Time Efficient Digit-Seril-Seril Two s Complement Multiplier Essm Elsyed nd Htem M. El-Boghddi Computer Engineering Deprtment, Ciro University, Egypt Astrct - Multipliction is n importnt primitive
More informationA New Algorithm to Compute Alternate Paths in Reliable OSPF (ROSPF)
A New Algorithm to Compute Alternte Pths in Relile OSPF (ROSPF) Jin Pu *, Eric Mnning, Gholmli C. Shoj, Annd Srinivsn ** PANDA Group, Computer Science Deprtment University of Victori Victori, BC, Cnd Astrct
More informationPerformance Monitoring Fundamentals: Demystifying Performance Assessment Techniques
Simplifying PID Control. Optimizing Plnt Performnce. Performnce Monitoring Fundmentls: Demystifying Performnce Assessment Techniques Roert C. Rice, PhD Rchelle R. Jyringi Dougls J. Cooper, PhD Control
More informationExponential-Hyperbolic Model for Actual Operating Conditions of Three Phase Arc Furnaces
Americn Journl of Applied Sciences 6 (8): 1539-1547, 2009 ISSN 1546-9239 2009 Science Publictions Exponentil-Hyperbolic Model for Actul Operting Conditions of Three Phse Arc Furnces 1 Mhdi Bnejd, 2 Rhmt-Allh
More informationThree-Phase High Frequency AC Conversion Circuit with Dual Mode PWM/PDM Control Strategy for High Power IH Applications
Interntionl Journl of Electricl nd Electronics Engineering 3: 009 hree-phse High Frequency AC Conversion Circuit with Dul Mode /PDM Control Strtegy for High Power IH Applictions Nbil A. Ahmed Abstrct his
More information