基于5G通信的配电网差动保护工程应用研究

Engineering application research on differential protection of distribution network based on 5G communication

为解决分布式电源接入下的配电网过流保护在整定配合上的难题以及配电网电流差动保护受限于大范围铺设光纤的问题,开展了基于5G通信的配电网电流差动保护工程应用研究。首先,测量了URLLC(超高可靠性和低延时通信)场景下的5G通信延时,分析了延时组成,并根据当前阶段5G通信延时偶尔存在大范围抖动的现状,选择差动保护电流同步方法。在此基础上,提出了基于配电网拓扑结构的5G通信自组网方案和配电网自适应电流差动元件构建方案。最终,研制了配电网电流差动保护装置并开展了工程应用,验证了基于5G通信的配电网电流差动保护的可行性和可靠性。

There is a difficulty in setting the coordination of over-current protection in the distribution network with distributed power sources and widely laying optical fiber for differential protection in the distribution network,the study on engineering practice of adopting 5G communication in differential protection in the distribution network is tried.Firstly,based on the 5G communication latency measured by the actual device in the URLLC(ultra-reliable and low latency communications) scenario,the form of the latency is analyzed,and the differential protection currentprotection current is chosen according to the current situation that the 5G communication latency occasionally exists the wide range of jitter.On this basis,a technology for constructing communication network based on the topology of distribution network and a construction technology of self-adaption current differential components in the distribution network is proposed.Finally,the current differential protection devices in the distribution network are developed and used in engineering,which proves the feasibility and reliability of the current differential protection in the distribution network based on 5G communication.