电测与仪表2017，Vol.54Issue(4)：106-111,6.
GIS中电子式电压互感器的VFTO抑制方法研究
Study on VFTO suppressing method for electronic voltage transformer in gas insulated substation
王峰 1康兵 1舒乃秋 1常怡东 1袁开明 1曹俊岭2
作者信息
- 1. 武汉大学 电气工程学院,武汉 430072
- 2. 国电南京自动化有限公司,南京 210032
- 折叠
摘要
Abstract
Affected by the very fast transient overvoltage (VFTO),the acquisition card of active electronic voltage transformer in the gas insulated substation (GIS) might be damaged while the circuit breaker is being operated.In order to solve this problem,a new impedance suppressing method for the electronic voltage transformer has been proposed in this paper.Through amplitude-frequency characteristic analysis,we deduced the amplitude of very fast transient overvoltage for the electronic acquisition card,and the multilayer coaxial capacitors in parallel structure is proposed to increase the capacitance of low voltage arm capacitor,which also increases high frequency voltage division ratio and effectively suppresses the VFTO secondary overvoltage.Finally,the simulation results show that the method can significantly reduce the VFTO secondary voltage output,thus it protects the collector from high voltage and improves operating stability of electronic transformer.关键词
电子式互感器/快速暂态过电压/电容分压器/高频分压比Key words
electronic transformer/VFTO/capacitive voltage divider/high-frequency voltage division ratio分类
信息技术与安全科学引用本文复制引用
王峰,康兵,舒乃秋,常怡东,袁开明,曹俊岭..GIS中电子式电压互感器的VFTO抑制方法研究[J].电测与仪表,2017,54(4):106-111,6.
