变压器差动保护制动曲线测试新方法

正常情况下使用三相电流的继电保护测试仪测试变压器差动保护制动曲线时,一般采取分相测试,即需在非测试相串联接入补偿电流或采用调整补偿系数的方式抑制非测试相动作。据此提出了一种新的测试方法,根据实际情况让变压器保护装置单相、两相或三相同时动作或不动作,并对几种典型变压器差动保护的接线方式进行了分析测试。结果表明,新方法合理、有效,测试数据与传统测试方法完全吻合。

New Test Method of Braking Curve for Differential Protection of Transformer

In normal conditions, it takes split-phase test method when three-phase current relay protection tester is used to measure braking curve of the transformer differential protection. It needs to curb the test phase action with series connection compensation current or compensation adjustment coefficient. According to the actual situation of transformer protection device for single-phase, two-phase or three-phase action or not, a new test method is put forward. The connection mode of various typical transformer differential protections is adopted to test the method. The results show that the proposed method is reasonable and effective and the test data consists with traditional test method.