Electric Power ›› 2013, Vol. 46 ›› Issue (5): 56-60.DOI: 10.11930/j.issn.1004-9649.2013.5.56.4

• Security column • Previous Articles     Next Articles

Operation Overvoltage Analysis of the Circuit Breakers with Closing Resistors in UHV Grids

HUANG Gang1, LIU Yu-jun2   

  1. 1. Sichuan Electric Power Corporation Maintenance Company, Chengdu 610094, China;
    2. School of Electrical Engineering, Southeast University, Nanjing 210096, China
  • Received:2012-12-27 Online:2013-05-05 Published:2015-12-14

Abstract: A summary was made of the circuit breaker explosion accidents happened in the past two decades in the ultra-high voltage (UHV) substations in China. In order to provide a technical basis for the operation and maintenance of circuit breakers with closing resistors in 500 kV transmission lines, the no-load switching tests were simulated through PSCAD on the backbone grid in west Sichuan province. The simulation results indicate that the circuit breakers can endure the operation overvoltage from both directions of the lines with the help of the both-side arresters and high-voltage reactors.

Key words: closing resistors, circuit breakers, operation overvoltage, PSCAD

CLC Number: