【摘要】 二次回路两点接地是引起保护装置不正确动作的原因之一,但二次回路两点接地引起母线差动保护误动却发生较少,对一起二次回路两点接地引起母线差动保护误动事故进行了详细分析,指出了引起事故的根本原因和主要因素,并提出了相关的防范措施。更多还原

【Abstract】 There are two groundings in secondary circuit, which is one of the reasons that arose the maloperation of protective relay. But the maloperation of busbar difference protection is less than the others. The paper analyzes an accident that two groundings arose the maloperation of busbar protection,points out the essential reason and the prime reason of the accident. At the same time, the anti-accident medthods are brought forword.更多还原