适用于分布式风电接入的110 kV线路距离保护Ⅱ段整定方法  

A Setting Method of the Second-zone Grounding Distance Protection for 110 kV Lines Applicable to Distributed Wind Power Integration

作　　者：张安龙 程曜于 黄福全 曾翔[2] 刘子俊 钱堃 文明浩[2] ZHANG Anlong;CHENG Yaoyu;HUANG Fuquan;ZENG Xiang;LIU Zijun;QIAN Kun;WEN Minghao(Shenzhen Power Supply Bureau Co.,Ltd.,Shenzhen 518001,China;State Key Laboratory of Advanced Electromagnetic Engineering and Technology,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]深圳供电局有限公司,广东深圳518001 [2]强电磁工程与新技术国家重点实验室(华中科技大学),武汉430074

出　　处：《浙江电力》2022年第1期125-130,共6页Zhejiang Electric Power

摘　　要：在分布式风电接入的110 k V线路上,按照常规保护配置要求,分布式风电侧通常不配置保护。但分布式风电接入后改变了系统电流、功率流向,在故障后可能导致故障点无法隔离。目前尚没有针对分布式风电侧距离保护整定方法进行的分析研究。在考虑分布式风电的故障特性下,通过序网分析,得到系统各种运行方式下的最小复合分支系数,并提出了在风电侧配置基于最小复合分支系数的距离保护Ⅱ段整定方案。在PSCAD/EMTDC建模进行了仿真验证,仿真结果表明改进的整定方法具有可行性。On the 110 kV lines connected to the distributed wind power,following the conventional protection configuration requirements,the distributed wind power side is usually not equipped with protection.However,since the distributed wind power is connected,the current and direction of power flow of the system have changed,resulting in isolation failure of fault in case of faults.So far there is no research to analyze the setting method for grounding distance protection on the distributed wind power side.Considering the fault characteristics of distributed wind power,the paper calculates the minimum composite branch coefficient under various operation modes of the system through sequence network analysis and proposes a setting method for the second-zone grounding distance protection on wind power side based on the minimum composite branch coefficient.A model is established on PSCAD/EMTDC for simulation and validation,and the simulation results show that the improved setting method is feasible.

关 键 词：分布式风电 距离保护 分支系数 定值整定 

分 类 号：TM773[电气工程—电力系统及自动化]