摘要
变电站二次系统接线复杂,点多面广,运行环境差,容易出现各种各样的异常情况和故障。分析了二次回路的常见问题,包括直流分布电容和一点接地的查找技术,电流互感器、电压互感器组成的交流回路的接地和极性,微机保护系统的光耦合和干扰以及抗干扰措施,并对这些常见问题给出了对策。
With the characteristics of complex circuits,a lot of connection points and harsh operation environment,the second circuit wiring of substations is vulnerable to a variety of abnormalities or failures.The problems commonly happened in the second circuit wiring are analyzed in the paper,including the DC distributed capacitance and searching techniques for single point grounding,the grounding and polarity of the AC circuit with PT/TA,the optical coupling and interference of computer protection system,and the anti-jamming measures.Meanwhile,countermeasures to deal with these problems are given.
出处
《南方电网技术》
2011年第5期94-97,共4页
Southern Power System Technology
关键词
二次回路
分布电容
一点接地
光耦回路
抗干扰措施
secondary circuit
distributed capacitance
single point grounding
optocoupler circuit
anti-interference measures
