基于5G通信的配电网差动保护技术研究

Research on differential protection of a distribution network based on 5G communication

现代配电网大量分布式电源的接入,使得传统三段式过流保护整定困难。基于光纤通信的差动保护建设成本高,难以大范围应用。5G通信的大带宽、低延时、高可靠特点为配电网差动保护业务提供了一种新的通信方式。通过分析5G通信承载配电网差动保护的技术手段,结合配电网差动保护对通信的技术要求,提出一种基于5G无线通信通道、UDP协议SV采样值报文格式、北斗卫星导航系统授时采样同步法的配电网差动保护方案。该方案在多个5G通信环境进行了验证,差动保护性能满足配电网系统要求。

The access of distributed power in a modern distribution network makes it difficult for the traditional three-section current protection to meet the differential protection needs for the laying of optical fiber infrastructures,and its high construction cost makes its wide application difficult.The extreme data rates,ultra-low latency,and ultra-high reliability of 5G communication provide a new communication way for differential protection in a distribution network.This paper analyzes the technologies of 5G communication for differential protection,and the requirements for communication,and then proposes a solution based on a 5G wireless communication channel,SV sampling value message over UDP protocol,and sampling synchronization with a Beidou satellite navigation system.This solution has been verified in multiple 5G communication environments,showing that its differential protection performance meets distribution network requirements.