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Research of the improved time difference method to distinguish TA's saturation
Author(s): 
Pages: 1-4,8
Year: Issue:  11
Journal: JOURNAL OF NATIONAL BUREAU OF MACHINE BUILDING INDUSTRY,P.R.C.

Keyword:  TA饱和差动保护高压线路;
Abstract: 电流差动保护中的TA饱和造成了对短路电流的变换误差,从而影响了差动保护的动作可靠性.文中在分析造成TA饱和的原因和饱和电流的特点基础上,提出了改进的时差法鉴别TA饱和的新方案,并对这一新方案进行了仿真分析.通过仿真分析可以发现,改进的时差法可以有效鉴别TA饱和,防止TA饱和引起的差动保护误动作.
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