基于5G通信的配电网架空线路差动保护应用技术

Differential protection application technology of distribution network overhead line based on 5G communication

配电网架空线路具有多电源、多联络、多支线等特点,易受到环境影响而发生瞬时故障,严重影响了电网正常运行。5G通信具有超低时延、超高可靠性的技术性能,将5G通信应用于架空线路的差动保护,拓展了光纤差动端到端通信的局限性,实现了配电网架空线路的故障快速隔离。首先提出了适用于配电网架空线路的多端差动保护逻辑;然后分析了5G通信关于通道时延、同步授时精度等指标的适应性;最后基于5G通信的特点,提出了针对报文乱序、报文丢帧处理等的优化措施。

The overhead lines of the distribution network has the characteristics of multiple power sources,multi-connections,multi-branch and so on.It is susceptible to transient faults due to environmental influences,which seriously affect the normal operation of the power grid.5G communication,with the technical performance of ultra-low latency and ultra-high reliability,is applied to the differential protection of overhead lines expands the limitations of optical fiber differential end-to-end communication,and realizes the rapid isolation of faults in the overhead lines of distribution network.Firstly the multi-terminal differential protection logic suitable for overhead lines of distribution network is proposed in this paper.Meanwhile,the indicator adaptability about channel delay,synchronization timing accuracy of 5G communication is analyzed.Based on the characteristics of 5G communication,some optimization measures for packet disorder and packet frame loss processing are proposed.