Provides exact fault location to one span

Transcription

1 TWS Mark VI Traveing wave faut ocator Provides exact faut ocation to one span Reduce down time by getting to the faut site faster Track intermittent sef cearing fauts and focus maintenance at the right spot to prevent a major breakdown Resuts automaticay dispayed and e-maied Fast instaation and set up on mutipe ines no ine or substation outage required Product Summary Description A device that provides extremey precise faut ocation on muitpe ines enabing operation and maintenance engineers to respond rapidy to events to correct defects at minimum cost and maximum efficiency Appication Faut ocation on interconnected overhead ines where high reiabiity is important. Accurate, consistent resuts for a types of fauts quicky dispayed in a contro room or engineering center where the information is needed to direct maintenance teams and reduce downtime

2 TWS Mk VI Traveing wave faut ocator Provides exact faut ocation to one span Reduce downtime by getting to the faut site faster Accuracy to ±500 feet (±150 meters) independent of impedance methods Returns quaity resuts for a types of fauts, incuding high resistance ground fauts and open circuits Accuracy is independent of ine ength, remote end infeed, non uniform ine construction, conductor asymmetry and mutua couping Can be used on ines with series compensation and tapped oads It is possibe to compensate for engths of underground cabe Consistent accuracy eiminates need to send out mutipe ine patros and heicopters to identify the faut site Can save hours of search time and reduce costs Faster restoration time reduces system risk posed by the possibiity of a second or third coincident faut Faster restoration time reduces the costs of running uneconomic generation needed to maintain system security during the ine outage Track intermittent sef cearing fauts and focus maintenance at the right spot to prevent a major breakdown Most overhead ine fauts are transient and can be successfuy re-cosed Mutipe trips can occur at the same pace over time due to a damaged insuator, growth of vegetation or conductor cashing Accurate faut ocation pinpoints these troube spots Panned maintenance can be undertaken to fix the minor transient probem before it becomes a major permanent one Fewer ine trips reduces the number of votage dips and subsequent customer compaints Resuts automaticay dispayed and e-maied Poing and dispay software automaticay coects data and dispays resuts in a dispatch center or engineering office on a singe screen No operator experience required E-mai notification to other team members Saves the protection and operations engineers time Fast instaation and set up on mutipe ines - no ine or substation outage required Moduar, reiabe hardware Most instaations competed in one day Monitors up to 8 circuits Spit core inear coupers are paced around the secondary wiring of the protection current transformers to capture the traveing waves Can be instaed with the circuit sti aive No need for specia votage transformers to coect traveing waves Device configuration via a web page - no specia software required Fash drive, no moving parts Convenient for use in centraized reay rooms Fexibe communications Integra dia up modem and ethernet port Externa GSM modem (optiona) TWS... where high reiabiity matters

3 Estimated faut ocation error traveing wave technoogy (TWS) versus impedance method Transmission ine ength Average TWS error Average impedance method error (± 5% of ine ength) Upper range of impedance method error (± 15% of ine ength) 25.0 km 50.0 km km km ± 150 m ± 150 m ± 150 m ± 150 m ± 1.25 km ± 2.5 km ± 5.0 km ± 7.5 km ± 3.75 km ± 7.5 km ± 15.0 km ± 22.5 km Concusions The onger the transmission ine ength, the more ikey customers are spending extra money and time to ocate fauts TWS technoogy is significanty more accurate than impedance method on transmission ines onger than 25km TWS ocates fauts to within one span (approximatey 300meters), irrespective of ine ength with a maximum error range of +/- 150 meters Impedance method error range varies widey, from average of 10% of ine ength to 30% (e.g., 30km on a 100km ine) Distance to faut ocation accuracy using actua customer resuts * traveing wave technoogy (TWS) versus impedance method Line type Pain feeder Pain feeder Series compensated ine Equipment type (technique) Numerica distance reay Numerica distance reay Using pre-faut, post faut votage comparison technique. No impedance based method can be accurate Distance to faut actua position 37.5 km 1.5 km Number of fauts over a period of time TWS error 0.1 km 0.0 km Location identified consistenty better than ±300 m on a fauts Impedance error 11.6 km 0.8 km 32 km Concusions Acuta customer resuts show that TWS technoogy consistenty and significanty yieded more accurate ocation of the actua faut TWS technoogy can be used on many different ine types incuding series compensated ines Faut ocation resuts from ESKOM, South Africa (Reference: Deveopments in Power System Protection Conference Pubication No 479 IEE 2001 ) km km 97.6 km 22.9 km Actua faut ocation TWS method ( exact ) Impedance method resuts Actua faut distance from end A km Actua faut distance from end B 19.5 km 30.6 km 43.7 km km 20.0 km Cacuated distance from end A km km 97.6 km 22.9 km km Cacuated distance from end B 19.5 km 30.6 km 43.7 km km 20.0 km Cacuated distance from Impedance end A error 92.8 km km 91.5 km 18.0 km km km 1.9 km -6.1 km -4.9 km 17.0 km Concusions Traveing wave method provided exact faut ocation each time Impedance error yieded inconsistent, widey varying distance-to-faut estimates Impedance error ranged between 1.4% and 20.7% of transmission ine ength * Note: customers decided to remain anonymous Cacuated distance from Impedance end B error 17.2 km 28.5 km 40.5 km 94.0 km 18.0 km -2.3 km -2.1 km -3.2 km km -2.0 km Note: actua customer faut ocation estimates documented on transmission ine ength of 140 km

4 TWS Mk VI Traveing wave faut ocator TWS - the traveing wave technique Genera Description The traveing wave uses the doube ended method of faut ocation An accurate time reference is provided by GPS time synchronization A T1A L A L FAULT Traveing waves generated by the faut propagate aong the ine in both directions TWS devices instaed at ine ends trigger on the arriva of the wave and assign an accurate time tag L B B The distance to faut is proportiona to the difference in arriva time (T1A T1B), the ength of ine (L A + L B) and the propagation veocity T1B TWS technique... not effected by ine transpositions, mutua couping of parae ines or changes in ine construction

5 TWS - traveing wave appication Genera Description Instaation requires minima cabing Mount GPS antenna with a cear view of the sky to ensure good GPS ock and time synchronization Fit inear couper transducers to the secondary of the protection current transformer wiring Connect communication channe to aow data to be processed at a centra ocation - essentia for correct doubeended operation Each TWS Mark VI can monitor up to 8 circuits convenient for use in common reay rooms Sateite CONTROL ROOM Distance to Faut Resuts Communication Link TWS A TWS B PROTECTION Transducer Transducer TO ALARMS Transducer TO PROTECTION TO PROTECTION Transducer ALARMS TO PROTECTION T R A N S M I S S I O N L I N E SUBSTATION A SUBSTATION B GPS antenna and inear coupers

6 TWS Mk VI Traveing wave faut ocator TWS - PC based TWS network configuration and resuts anaysis Network configuration The graphica interface to easiy set TWS Mark VI abes and communication parameters and to define two or three ended circuits by mapping a ine modue on one TWS Mark VI device with another. Resuts downoad and dispay TWS Mark VI devices automaticay or manuay poed, data downoaded and distance to faut resuts cacuated and dispayed on a singe screen aong with the heath status of the system. Resuts can aso be emaied to a defined user ist. More in depth anaysis Dispay of TWS Mark VI waveforms to check trigger point and determine type of faut, for exampe phase to phase or phase to earth fauts.

7 TECHNICAL SPECIFICATIONS Power suppy Front pane Line modues Performance GPS card GPS antenna Communication options and aarms Configuration Environmenta Immunity Mechanica Votage range Power Indicators Quantity Channes Gain Triggering Sampe rate Storage Cock Accuracy Puse output IRIG B Seria port LED indicators Lead ength Mounting Modem Seria port Ethernet port Aarms Base station Web page Operating temperature Storage temperature Reative humidity Encosure Dieectric strength Dimensions Weight 90 to 250 VAC or 80 to 240 VDC; option 35 to 65 VDC 120W maximum LEDs indicate power on, GPS ock, watchdog 1 expandabe to 8 3 (one per phase). Inputs from externa spit core inear coupers Programmabe via configuration fie. Fu scae defection ± 0.2V at maximum gain Over trigger preset at +/- 25% of FSD 1.25 Mhz Non voatie fash drive. Minimum of 500 records saved per ine modue Interna rea time cock synchronized by GPS modue 1µs when ocked Optiona - 1pps or 1ppm seectabe Output - moduated or 5V eve avaiabe as standard For setting time zone and dayight saving Showing GPS ock, antenna status and number of sateites being tracked 10 meters (optiona extension eads avaiabe) Via 25mm pipe mast Interna ISA 56K Hayes compatibe modem For externa modem or, optionay, to interface to SCADA via DNP3 For network communications Normay open contacts rated at 125 VDC, 100W (non reactive) for power fai, watchdog, GPS ost ock and device triggered Edit configuration and view diagnostics Via browser to edit configuration and time zones, view diagnostics and set IP addresses 0 to +55º C (32 to 131º F) -40 to +70º C (-40 to 158º F) 5 to 90% non condensing IP20 to EN60529 Conforms to IEC 801-4, IEC 255-5, ANSI / IEEE U, 19 inch rack mounting. Width 448.8mm (17.68 inches) Depth 386mm (15.21 inches) Height 266.7mm (10.5 inches ) 18 kg (40 pounds)

8 TWS Mk VI Traveing wave faut ocator 7 ways TWS can save time and money and improve reiabiity 1. Reduce ine patro manpower costs Line patros take onger to ocate the faut position and use scarce abor time which coud be more efficienty used esewhere. 2. Reduce aeria patro costs Aeria patro may be required over difficut terrain. Patros can be reduced in frequency freeing up time for other purposes. 3. Prevent re-occuring fauts Faiure to accuratey ocate the position of a faut often resuts in an inabiity to identify and rectify the true cause of the faut which often resuts in faut re-occurence. By identifying the precise ocation of fauts, equipment damage can be noted and preventive steps can be taken to make repairs / avoid re-occurences. 4. Reduce power quaity impact of preventabe fauts Suppy contracts to arge industria customers often have a power quaity cause where there is a cost penaty for each votage sag or oss of suppy incident. 5. Eiminate separate substation cock TWS can take the pace of a stand aone substation cock. 6. Reduce costs to maintain system security during ine outage Reduce the run time of uneconomic power generation. 7. Reduce cost of reguatory fines due to power outage Reduces the severity of any fine by minimizing the time that the power is interrupted. TWS faut ocators, for high reiabiity transmission systems TWS faut ocators reduce the risk of power transmission faiure through fast, accurate ocation of permanent and transient fauts. Consistent review of the ocation, date and cause of fauts foowed by timey maintenance reduces tota operating costs and increases system reiabiity. QUALITROL Fied Services QUALITROL provides on-site commissioning/start-up and comprehensive maintenance contracts to a customers wordwide. To further improve reiabiity, an extended warranty is avaiabe on seected products commissioned by QUALITROL. QUALITROL Educationa Services QUALITROL professiona training (designed to achieve hands-on performance based objectives) prepares operations, maintenance, and engineering personne to insta, test, configure, operate and maintain QUALITROL products. QUALITROL Acceerated Deivery QUALITROL provides acceerated deivery on many products and services incuding repacements, spare parts and repairs. About QUALITROL QUALITROL manufactures substation and transformer monitoring and protection devices used by eectric utiities and manufacturing companies. It is the goba eader in saes and instaations of transformer asset protection equipment, faut recorders and faut ocators. Estabished in 1945, QUALITROL produces thousands of different types of products on demand, each customized to customers' unique requirements QUALITROL Company LLC, an ISO 9001 system certified company. A rights reserved. Information subject to change without notice. A trademarks are properties of their respective companies, as noted herein. IP-F21-01L-01E. Emai: info@ quaitrocorp.com