基于5G通信的有源配电网新能源送出线路纵联保护  

Pilot Protection of New Energy Transmission Line in Active Distribution Network Based on 5G Communication

作　　者：李铁成 范辉 张卫明 王献志 张艺宏 戴志辉 LI Tiecheng;FAN Hui;ZHANG Weiming;WANG Xianzhi;ZHANG Yihong;DAI Zhihui(Electric Power Research Institute,State Grid Hebei Electric Power Company,Shijiazhuang 050021,China;Hebei Key Laboratory of Distributed Energy Storage and Micro-Grid,North China Electric Power University,Baoding 071003,China)

机构地区：[1]国网河北省电力有限公司电力科学研究院,河北石家庄050021 [2]华北电力大学(保定)河北省分布式储能与微网重点实验室,河北保定071003

出　　处：《中国电力》2024年第11期139-150,共12页Electric Power

基　　金：国家电网有限公司科技项目(TSS2022-14);国网河北省电力有限公司科技项目(SGHEJS00JYJS2100218)。

摘　　要：传统纵联差动保护在新能源场站接入后会出现可靠性降低甚至拒动的问题。为此,首先提出了秩差累加积波形相似度算法并分析了其抗干扰特性,该算法通过计算两组数据的最大不匹配程度来度量两波形的相似度,显著减弱了异常数据对波形相似度判断的影响。在此基础上,利用送出线路两侧暂态电流时域波形特征的差异,提出了基于5G通信技术纵联保护新原理并构建了完整的保护方案。最后,通过PSCAD/EMTDC验证了所提保护方案的性能。仿真结果表明,所提方案不受新能源类型的限制,适用于各类新能源场站,具有良好的抗延时防误动、抗噪声及异常数据的能力;在新能源弱出力及断路器重合于永久性故障情况下也具备良好的动作性能。Traditional pilot differential protection will have the problem of reliability reduction or even failure to operate after the access of new energy stations.To this end,this paper first proposes a rank difference accumulation waveform similarity algorithm and analyzes its anti-interference characteristics.The algorithm measures the similarity of two waveforms by calculating the maximum mismatch degree of two sets of data,which significantly reduces the influence of abnormal data on waveform similarity judgment.On this basis,using the difference of transient current waveform characteristics on both sides of the transmission line,the paper proposes a new pilot protection principle based on 5G communication technology and constructs a complete protection scheme.Finally,the performance of the proposed protection scheme is verified with PSCAD/EMTDC.The simulation results show that the scheme is not limited by the types of new energy and is suitable for all kinds of new energy stations.It has a good ability to resist delay,misoperation,noise,and abnormal data.It also has good operation performance in the cases of weak output of new energy and circuit breaker reclosing on permanent fault.

关 键 词：新能源 有源配电网 纵联保护 5G通信 波形相似度 暂态电流 

分 类 号：TM773[电气工程—电力系统及自动化] TN929.5[电子电信—通信与信息系统]