欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
PT二次交流电压回路必须接地的，且只能一点接地。PT二次交流电压回路异常接地时，二次交流电压回路的线电压基本不受影响，仅会引起二次交流电压回路零序分量发生异常变化，导致有零序分量参与计算的相关保护功能将可能不正确动作。结合等值电路分析PT二次交流电压回路一点和两点接地的电量区别，研究了PT二次交流电压回路异常接地故障时接地点查找方法。
英文摘要：
When a potential transformer （ PT for short ） undergoes a secondary circuit featuring two-point or multiple-point grounding, the system failure of a substation in operation leads to voltage phase deviation and interferes the protector＇s accuracy on measuring the voltage, it may cause protector＇s non-action or wrong action on distance protection or zero-sequence directional protection. Based on equivalent circuit, the power difference between one-point and two-point grounding is detected during PT＇s secondary circuit. This paper offers several searching methods to detect failures caused by PT＇s secondary circuit featuring two-point grounding.
同期刊论文项目
同项目期刊论文
期刊信息
位置：