主变压器差动保护误动的案例分析

Case analysis of incorrect action of main transformer differential protection

以某电厂主变压器差动保护误动案例为研究对象,介绍了南瑞继保电气有限公司的RCS9671C变压器差动保护装置和电流互感器防开路保护装置的原理和作用,结合现场实际情况,分析了主变压器差动保护的误动原因,提出了反事故措施。

Taking the incorrect action of the main transformer differential protection of a power plant as study object,the principle and functions of the RCS9671C transformer differential protection device and the current transformer anti-open circuit protection device,which are made in NR Electric Corporation Limited,were introduced.Combining with practical site situation,the reasons of incorrect action of the main transformer differential protection were analyzed,and televant anti-accident measures were proposed.