LOW VOLTAGE APPARATUS ›› 2022, Vol. 0 ›› Issue (1): 7-13.doi: 10.16628/j.cnki.2095-8188.2022.01.002

• Research & Analysis • Previous Articles     Next Articles

Effect of Vacuum Circuit Breakers Prestrike Characteristics on Inrush Current Suppression of Controlled Switching Capacitor Banks

PENG Jing1,2, DENG Yunkun1, WANG Ke1, HUANG Jincai2, GENG Yun2, YAN Jing2   

  1. 1. Yunnan Grid Company Limited Electric Power Research Inslitute, Kunming 650217, China
    2. State Key Laboratory of Electric Equipment and Insulation,Xi’an Jiaotong University, Xi’an 710049, China
  • Received:2021-09-27 Online:2022-01-30 Published:2022-03-04

Abstract:

The prestrike characteristics of vacuum circuit breaker (VCB) have a significant effect on the accuracy controlled switching capacitor banks.The effects of prestrike time and scattering in the VCB on the accuracy of the controlled switching capacitor banks are studied.The VCBs are cup-type AMF VCB and spiral-type TMF VCB.The prestrike time of the cup-type AMF VCB and the spiral-type TMF VCB is measured by experiments and its dispersion is calculated.Through 40.5 kV three-phase switching back-to-back capacitor bank simulation circuit,the inrush current amplitude of two controlled switching modes is calculated.Compared with the cup-type AMF VCB,the spiral-type TMF VCB has smaller prestrike time and dispersion.Compared with the phase selection method based on the closure time of the contact in the VCB,the phase selection method based on the prestrike time is more favorable to suppress inrush current.

Key words: vacuum circuit breaker (VCB), phase collection control, shunt capacitor banks, inrush current

CLC Number: