变压器比率差动保护调试新方法的应用分析

Application Analysis of New Test Method for Transformer Ratio Differential Protection

介绍变压器比率差动保护调试新方法研究背景,从选点(标幺值坐标)、计算试验电流、加量验证保护动作等方面分析主变压器比率差动保护校验法的校验步骤,并通过实例对该方法的应用效果进行验证,结果表明该方法在变压器比率差动保护调试应用中,能减少计算量50%左右,节约时间60%左右,可有效降低因过量动作对保护元器件的损害。

This paper introduces the reason of a new test method research for transformer ratio differential protection,elaborates the measure of the new test method,which is based on select a point（its coordinate is relative value）,calculats the test current,uses the calculated test current to do experiment and so on.We use practical example to prove the application effect of the new test method,and obtain the results：Compared to traditional test method in application,the new test method can reduce haif of the calculateion work,can save 60% of work time;and what＇s more,the new method do not need the relay protection device act that many times,this will reduce damage to the relay protection device effectively.