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A new simple and credible method of determination and verification for third winding circuit of voltage transformer
Author(s): 
Pages: 73-76
Year: Issue:  15
Journal: RELAY

Keyword:  电压互感器三次回路检测方法;
Abstract: 在220 kV系统电网中广泛应用着零序功率方向保护.对于由电压互感器三次回路3U0构成的零序方向元件,用常规方法不易检测出其3U0的两根导线混淆的错误接线,致使零序方向保护误动作的情况时有发生.分析了常用的两种检测方法的弊端,提出了一种简单可靠的电压互感器三次回路检测新方法.理论分析和实践经验表明,该方法可以明确地检测出3U0的两根导线混淆的错误接线.
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