1 / 32

High Performance Surge Arresters for UHV Systems 4 - 3

High Performance Surge Arresters for UHV Systems 4 - 3. Yoshihiro Ishizaki Toshiba Corporation Shingo Shirakawa Japan AE Power System Corporation Shinji Ishibe Mitsubishi Electric Corporation

homer
Télécharger la présentation

High Performance Surge Arresters for UHV Systems 4 - 3

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. High Performance Surge Arresters for UHV Systems 4 - 3 • Yoshihiro Ishizaki Toshiba Corporation • Shingo Shirakawa Japan AE Power System Corporation • Shinji Ishibe Mitsubishi Electric Corporation • Masahiro Kan Langfang EPRI Toshiba Arrester Co. Ltd., China • Yoshibumi Yamagata Tokyo Electric power Corporation Jan. 30, 2009 Toshiba Corporation Japan Yoshihiro Ishizaki

  2. Contents • General Introduction of UHV Systems • Specification & Development • of UHV a.c.GIS-arrester • Standardization • of UHV a.c. various arresters • Conclusion

  3. Concept & Specificationof insulation co-ordination for UHV systems

  4. Effect of New Concept & Technologies 1100 kV High performance GIS-arrester New technologies greatly contributed to the economical design of 1100kV equipments and transmission tower size from 143m to 110m 1100 kV Steel Tower Comparison

  5. Insulation Rationalization based on arrester 1.0p.u.= Highest system voltage x √2 / √3

  6. Contents • General Introduction of UHV Systems • Specification & Development • of UHV a.c.GIS-arrester • Standardization • of UHV a.c. various arresters • Conclusion

  7. Specifications of 1100kV GIS-arrester • It has been verydifficult to achieve the specifications at that time.

  8. Technologiesfor Realizing High Performance GIS-Arrester Improving performancesof ZnO elements By applying these measures, the important performances of ZnO element were improved very much. & 1100kV GIS-arrester was realized. 1 set ZnO element stacks ×４sets(ZnO elements firstlydeveloped and commercialized in Japan)

  9. Switching Surge Duty Testaccording to JEC-156-1963 Pre-heat Test sequence • Test Conditions • supposed resistor re-closing failure • Power source voltage: • Rated voltage of SA • Line charging voltage : • Peak value of rated voltage of SA • Surge Impedance : 240 ohm • Line length : 250km • Line connection : • Opposite polarity near • 60 degrees during voltage rise • Energy per shot : 20MJ Active suppression of SW surge using arresters is an original concept launched first in Japan Test circuit

  10. 30MJ (7.4MJ x 4) Stability evaluation test Z=240ohm 20MJ x 3shots Switching surge duty test Quoted by K. Hidaka, et al.,”Development of 1100kV AC GIS-arrester and the Verification Tests”, IEC/CIGRE Symposium Beijing 18-21 2007 Energy Durability & Thermal Stability performances of arrester are demonstrated in the each step of stability evaluation test. After absorbing very severe energy 30MJ, thermal stability of arrester is secured. Switching surge duty corresponds to the step 3 of stability evaluation test.

  11. Voltage Distribution & Life Performance were confirmed by measurement & analysis Special grading shield controls voltage distribution ratio along ZnO elementsless than 1.1 p.u. Calculation analysis results almost agree with voltage distribution measurement results. • Life performance test • Applied voltage ratio : 90% • Temperature : 120 ℃ • Term : 6 months Max. permissible applied ratio of ZnO element (90%)was secured & Life performance was confirmed 3D electrostatic field calculation analysis Measuring by fiber optical equipments K. Hidaka, et al.,”Development of 1100kV AC GIS-arrester and the Verification Tests”, IEC/CIGRE Symposium Beijing 18-21 2007

  12. Long-term Reliability Tests from 1996 at Sin-haruna test station of TEPCO • Stable performanceduring 10 years without deterioration was confirmed • Thermal performance Test results agree with calculation results • Hysteresis of performanceof leakage current is caused by time difference between ambient & ZnO elements temperatures Long-term reliability and stable performance of UHV GIS-arrester is confirmed by this test. K. Hidaka, et al.,”Development of 1100kV AC GIS-arrester and the Verification Tests”, IEC/CIGRE Symposium Beijing 18-21 2007

  13. Contents • General Introduction of UHV Systems • Specification & Development • of UHV a.c.GIS-arrester • Standardization • of UHV a.c. various arresters • Conclusion

  14. Representative performance, construction& outline of various country & type UHV arresters These were investigated by the CIGRE WG

  15. Issuesof Existent IEC Standard for UHV Arresters of which studies have been just started by task force in maintenance team MT4 of IEC TC37.

  16. 1-2) Protective Performance of UHV High Performance Arrester will be added on this table Quoted from Presentation Document prepared by Volker Hinrichsen for 1100 – 1200kV 2.0 - …?

  17. 1-3)Re.Energy durability Quoted from Presentation Document prepared by Volker Hinrichsen for Long duration current impulse withstand test condition is not specified in the existent IEC 60099-4 for UHV arresters Testing parameters for class-6 & procedure, including TOV duty, for UHV arresters should be added.

  18. Presentation Document prepared by Volker Hinrichsen for 2-1) Insulation Withstand Test Methodof Arrester Housing Test on individual unit housing is only specified now.

  19. 1100kV 1100kV 1100kV 1100kV 1100kV 1100kV 12.5m 12.5m 12.5m 12.5m 12.5m 12.5m 500kV 500kV 500kV 500kV 500kV 500kV m m m m m m 4.5 4.5 4.5 4.5 4.5 4.5 (2) (2) [4] [4] Porcelain Porcelain Porcelain Porcelain - - - - housed type housed type housed type housed type Insulation Withstand Testconducted in China. Complete housing assembly of porcelain-housed type UHV arrester mounted on the pedestal has been successfully withstood these test voltages. Note: (*) dry condition, (**) dry & wet conditions In IEC standard, test on complete arrester housing isunder consideration now, but it is considered as essential for arrester housing for UVH arresters, because of big shied ring equipped.

  20. 2-2) Possible Risks due to Pollution were pointed out to be solved by the relevant papers and IEC standards. Quoted from B. Richter, et al., “Mo surge arrester for systems above 550kV” IEC/CIGRE Symposium Beijing 18-21 2007 ③Risk of internal partial discharge Adequate evaluation methods need to be considered for verification.

  21. conducted in Japan for the arresters up to 500kV systems. (TOV superimpose method according to JEC standard)

  22. Typical methods to remove hydrophobicity & to establish pollution layer on SiR housing , which were developed in Japan (high density) Pollution layer Hydrophobicity of SiR rubber housing should be removed for anti-pollution test of polymer housed arresters for severe side evaluation.

  23. 2-3)Mechanical Consideration for Porcelain-housed Type Arresters Acceleration (G) Comparison ofResponseSpectra It is recommended that seismic responses, such as displacement of top and bending stress, are experimentally measured, because dynamic characteristics are considered to have a significant influence on seismic response of arrester and effect of damper is not calculated. Eigen-value Analysis Analysis is possible for pedestal mounting porcelain-housed type arresters against the seismic test conditions, considered as severe. Finite element 1st mode 2nd mode model 1.6Hz 8.6Hz Response Spectra of input Waveform

  24. Damper Suggestionto Mechanical Consideration for AIS type UHV SA • High reliabilityagainst followings should be considered • Earthquakefor arresters mounted • on pedestal • Evaluation test results in China against most severe seismic test condition. • Although, IEC TR 62271-300 Seismic qualification of alternating current circuit-breakers is referred in IEC 60099-4 (arrester standard), the above testing condition should be considered. • Vibrationsoriginated from power conductors by wind to the arresters suspended hanging

  25. Contents • General Introduction of UHV Systems • Specification & Development • of UHV a.c.GIS-arrester • Standardization • of UHV a.c. various arresters • Conclusion

  26. Conclusion • Technology of high performance UHV GIS-arresters will contribute to realize AIS type UHV arresters for 1200 kV systems. • Specific consideration as for insulation withstand, anti-pollution and mechanical performance for AIS type UHV arresters seems to be necessary to be given. • Specification for continuous operating voltage should be carefully determined because it directly affects protective characteristics and life performance of the UHV arresters. • TF in IEC TC37 (Surge arresters) MT4 group has just started to consider the issues described above, therefore the issues will be solved in near future by TF, with some compromises.

  27. Thank you for your kind attention

  28. Technologiesfor Realizing High Performance GIS-Arrester Improving performancesof ZnO elements By applying these measures, the important performances of ZnO element were improved very much. & 1100kV GIS-arrester was realized. 1 set ZnO element stacks ×４sets(ZnO elements firstlydeveloped and commercialized in Japan)

  29. Consideration as for Specification of Arrester Note: * with capacitor, ** (4) / (2)x(3), *** include effect of parallel connection Rated voltage of an arrester, Ur The maximum permissible r.m.s. value of power frequency voltage between its terminals at which it is designed to operate correctly under temporary overvoltage conditions as established in the operating duty tests of IEC 60099-4. The rated voltage is used as a reference parameter for the specification of operating characteristics 1.751.551.48 (6) U20kA (5) Ur (2) Uref 75 90% Temporary Overvoltages: SLG Fault: Effectively Grounded System 1,3 - 1,4 Ungrounded System ≥ 1,7 Load Rejection 1,2 – 1,6

  30. Seismic Specificationsof Substation Equipments

  31. 50% S.W. Impulse Flashover Voltage of Rod-Plane

  32. Protective Performance of 1100kV Arrester 1620(1.80pu) 1.56pu

More Related