利用六角图对500kV自耦变压器进行带负荷测试的原理与分析

Principle and Analysis Method of Test with Load for 500 kV Autotransformer by Using Hexangular Vector Chart

变压器投运后,必须带负荷校验保护的回路接线。介绍了利用六角图带负荷测试变压器保护接线的原理和分析方法,指出常见错误可能出现的原因,阐述了自耦变压器的结构和原理。通过500kV罗洞变电站2号主交压器本体更换工程校验了保护接线的正确性,同时也验证了分析方法的有效性。

The wiring of protection loop must be tested after the commissioning of transformer. This paper introduces the principle and analysis method of test with load for the wiring of protection loop of the transformer by using hexangular vector chart, points out the causes of common mistakes, and expounds the structure and principle of autotransformer. In the end, the wiring correctness of the protection by proposed method is verified through replacing No. 2 main transformer in 500 kV Luodong substation.