基于5G通信网络的配电网电流差动保护协议研究

Research on current differential protection protocol of distribution network based on 5G communication network

因电子差量化流动造成配电网电压负载不均,为实现对电网运行环境的调节与维护,提出基于5G通信网络的配电网电流差动保护协议。在5G通信网络的配电网环境下,依据改进熔断器反时限特性曲线实现反时限电流保护,选择适宜的时间限定参数整定重合闸时间,在配电网差动保护中,可接入GPS对时装置的秒脉冲信号,采用故障信号同步法实现GPS长期异常情况下的差动同步。实验结果表明,应用新型电流差动保护协议后,配电网电压的负载极值达到379 V,而电子差量化流动周期却缩短至1.48 ms,可实现对电网运行环境的理想化维护与调节。

Due to poor electronic quantitative flow uneven load distribution network voltage,in order to realize the regulation and maintenance of the operation environment of the power grid,the current differential protection protocol based on 5G communication network is proposed.In the distribution network environment of 5G communication network,the inverse time current protection is realized according to the improved inverse time characteristic curve of fuse.The appropriate time limited parameters are selected to set the reclosing time.In the distribution network differential protection,the second pulse signal of GPS time synchronization device can be connected,and the fault signal synchronization method is used to realize the differential synchronization under long⁃term abnormal conditions of GPS.The experimental results show that the load extreme value of distribution network voltage reaches 379 V,while the electronic differential quantification flow period is shortened to 1.48 ms after applying the new current differential protection protocol,which can realize the ideal maintenance and regulation of the power grid operation environment.