低压电力线载波通信信号与漏电保护器兼容性分析

Analysis on Compatibility of Low Voltage Power Line Communication Signal and Earth Leakage Circuit Breaker

低压电力线载波通信是目前主流的电力短程通信方式之一,也是目前用电信息采集系统建设的重要通信手段。但是由于载波通信是利用低压电力线作为传输介质传播高频通信信号,易于引发高频对地漏电流,因此对于部分抗高频干扰能力较弱的漏电保护开关会引发动作,造成跳闸。目前这一问题已经比较突出,严重影响了居民用户的正常用电,因此急需找到载波对漏电保护器干扰的机理,进行相关技术改进。文章在现场测量和实验室验证基础上,对这一问题的发生原因进行了分析,并对解决这一问题途径进行了思考。

Low voltage power line communication is not only one of the mose common short range electrical communication approaches, but also the important way of advanced metering infrastructure.The use of distribution electrical power network as transmission media, however, will lead high frequency current leakage to ground and will cause action of earth leakage circuit breaker. This problem will greatly influence the normal life of electrical customers. An effective mechanism needs to be found out to achieve improvement on earth leakage circuit breaker. The reason of such problem is analyzed through mess measurement data and verification experiments, and a valuable approach to alleviat this problem is developed.