中、低压母线微机的不完全电流差动保护分析

Analysis on incomplete current differential microcomputer protection for medium and low voltage busbar

针对中、低压母线系统的特点,分析了此系统母线保护实现的难点,比较分析了完全电流差动和不完全电流差动2种方案的差别,通过保护装置各自的模拟通道和数据采集变换,分别进行了保护配置、算法选择和整定计算,提出了不完全电流差动的完整解决方案。

Aiming at the features of medium and low voltage busbar system,the difficulties in implementation of busbar protection for this system were analyzed.The differences between the complete current differential protection scheme and the incomplete current differential protection scheme were analyzed and compared.Based on data acquisition and transformation through the analog channel of each protection device,the protection configuration,algorism selection and setting calculation were carried out respectively;and a complete solution for incomplete current differential protection was put forward.