摘要
宜宾站自调试起,多次出现换流变压器末屏电压测量故障。基于2015年7月1日换流变压器阀侧电压测量故障,在回路原理和等效电路的基础上,分析了末屏电压异常的原因,提出了多种解决末屏电压畸变的办法和措施。消除末屏电压发生谐振和畸变将有利于直流系统和保护设备运行的可靠性,对现有的直流工程中末屏电压测量出现回路的改造,以及未来直流工程中末屏电压互感器的设计,提供参考依据。
Since the commissioning for Yibin converter station begins, several voltage measurement faults at bushing tap occur frequently. Based on the valve -side voltage measurement fault of converter transformer in 1st July, 2015, the abnormal reasons for voltage at bushing tap are analyzed on the basis of circuit principle and equivalent circuit, and some methods and measures to solve the voltage distortion at bushing tap are put forward. Eliminating the voltage resonance and distortion at bushing tap will be conducive to the operation reliability of DC system and protection device, and it provides a reference for the transformation that the circuit occurs during voltage measurement at bushing tap in the existing HVDC project, as well as the design of voltage transformer at bushing tap for the future HVDC project.
出处
《四川电力技术》
2015年第6期51-55,共5页
Sichuan Electric Power Technology
关键词
直流输电
换流变压器
末屏电压
畸变
电压互感器
铁磁谐振
HVDC transmission system
converter transformer
end shield voltage
distortion
voltage transformer
ferromagnetle resonance
