含逆变型分布式电源的配电网分区域电流保护  

A Partitioned Current Protection Scheme of Distribution Network with Inverter Interfaced Distributed Generator

作　　者：乔一达 吴红斌[1] 吴通华 李新东 Qiao Yida;Wu Hongbin;Wu Tonghua;Li Xindong(Anhui Province Key Laboratory of Renewable Energy Utilization and Energy SavingHefei University of Technology,Hefei 230009 China;State Grid Electric Power Research Institute NARI Group Corporation,Nanjing 211106 China)

机构地区：[1]新能源利用与节能安徽省重点实验室(合肥工业大学),合肥230009 [2]南瑞集团有限公司(国网电力科学研究院有限公司),南京211106

出　　处：《电工技术学报》2022年第S01期134-144,共11页Transactions of China Electrotechnical Society

基　　金：国家自然科学基金区域创新发展联合基金(U19A20106);智能电网保护和运行控制国家重点实验室项目(大规模分布式光伏接入配电网的精细化建模和保护控制技术研究)资助。

摘　　要：针对大规模逆变型分布式电源接入配电网后对传统电流保护可靠性产生影响的问题,该文提出一种分区域电流保护方案。分析含逆变型分布式电源的配电网的故障特性,并将配电网线路划分为逆变型分布式电源的上游线路区域、下游线路区域和并网线路区域。针对上游线路区域的保护,提出一种自适应方向电流保护方案;下游线路区域则采用基于保护本地信息的自适应电流保护方案;并网线路区域考虑采用电流差动保护方案。通过算例系统进行仿真,验证了含逆变型分布式电源的配电网分区域电流保护方案的有效性。In view of the problem that the large-scale inverter interfaced distributed generator has an impact on the reliability of traditional current protection when it is connected to the distribution network,it proposes a partitioned current protection scheme in this paper.It analyzed the fault characteristics of the distribution network with inverter interfaced distributed generator,and divided the distribution network lines into the upstream line area,the downstream line area,and the grid-connected line area of the inverter interfaced distributed generator.Aiming at the protection of the upstream line area,an adaptive direction current protection scheme is proposed.And the downstream line area adopts an adaptive current protection scheme based on the protection of local information.Then the grid-connected line area considers the use of current differential protection scheme.With the simulation of the example system,the effectiveness of the partitioned current protection scheme of distribution network with inverter interfaced distributed generator is verified.

关 键 词：逆变型分布式电源 故障特性 自适应电流保护 方向元件 电流差动保护 

分 类 号：TM773[电气工程—电力系统及自动化]