5G通信条件下的线路差动保护优化策略研究

Research on Optimization Strategy of Line Differential Protection under 5G Communication Conditions

线路电流差动保护具有良好的选择性和速动性,但难以应用于光纤铺设率不高的配电网。5G通信技术的出现,为电流差动保护的数据交互提供了新的传输通道。针对5G的差动保护在应用中存在差动电流数据量大、丢包率较高以及报文乱序等问题,提出了省流量模式、冗余发送机制以及乱序报文处理等优化策略,并通过实验室数据分析以及现场工程应用验证了优化策略的可行性及有效性,为今后5G差动保护的推广和应用提供了借鉴。

Line current differential protection has good characteristics in selectivity and short operate time,but it is difficult to apply to distribution network with low fiber laying rate.The emergence of 5G communication technology provides a new transmission channel for data exchange of current differential protection.Differential protection based on 5G has unsolved issues,such as large amount of differential current data,high packet loss rate and disorder of message sequence in the application.This paper proposes some optimization strategies such as traffic-saving mode,redundant transmission mechanism,and out-of-order message processing.We also verifies the feasibility and effectiveness of the optimization strategy through laboratory data analysis and field application,and this strategy can be used for the promotion of 5G differential protection in the future.