基于三支路法的母差比率制动系数校验方法研究

Research on the Debugging Method for Checking the Ratio Braking Coefficient of Bus Differential Protection Devices Based on Three Branch Method

针对母差保护装置调试时常常无法准确判断大差、小差动作先后时序,导致大差、小差比率制动系数校验并不准确。提出一种更加准确的母差保护装置比率制动系数校验方法,并以北京四方型号为CSC-150母差保护装置的差动逻辑为例进行理论推导,验证该方法可行性。

In light of the fact that it is often impossible to accurately check the sequence of big differential protection and small differential protection actions during the verification of bus differential protection devices,which leads to inaccurate ratio braking coefficient of big differential protection and small differential protection.This paper proposes a more accurate method for checking the ratio braking coefficient of bus differential protection devices and takes the differential logic of Beijing Sifang CSC-150 bus differential protection device as an example for theoretical derivation to verify the feasibility of this method.