500kV变压器比率差动保护原理及试验方法的研究

Study on Differential Protection Principle of Ratio Braking Style for 500kV Transformer and Its Testing Method

摘要: 分析了变压器微机差动保护原理, 并以500kV Y0/Y0/△-11型三绕组变压器和南瑞RCS978变压器微机保护为例阐述了变压器主变差动保护试验方法, 提出了一种验证变压器微机保护比率差动曲线及拐点的思路及方法。

Abstract: This paper analyses the differential protection principles of transformer, uses the 500 kV Y0/Y0/△-11 three-winding transformer and NARI'S RCS978 sets as an example to illustrate the testing steps, and puts forward a testing method to test the ratio-differential relaying and its inflexions.