基于避雷器TOV特性扩展华北风电集送系统工频过电压限值的研究  

Extension of Limit Value of Power-Frequency Overvoltage Based on TOV Withstand Characteristics of Arresters in North China Centralized Wind Power Transmission System

作　　者：王晨星 王聪 彭珑[1,2] 王茂海 WANG Chenxing;WANG Cong;PENG Long;WANG Maohai(NorthChina Electric Power Research Institute Co.,Ltd.,Beijing 100045,China;Electric Power Research Institute,Jibei Electric Power Co.,Ltd.,Beijing 100045,China;North China Branch of State Grid Corporation of China,Beijing 100053,China)

机构地区：[1]华北电力科学研究院有限责任公司,北京100045 [2]国网冀北电力有限公司电力科学研究院,北京100045 [3]国家电网公司华北分部,北京100053

出　　处：《电瓷避雷器》2022年第4期33-42,共10页Insulators and Surge Arresters

基　　金：国家电网有限公司华北分部科技项目(新能源集中送出系统中基于改进避雷器TOV耐受特性的暂态过电压运行策略研究)(编号:1100/2022-02001B)。

摘　　要：华北地区风电集中式送出系统的过电压现行规则中,短时限内工频过电压限值要求有待进一步明确和细化,为此提出了基于避雷器暂时过电压(TOV)耐受特性的系统工频过电压运行规则扩展。在梳理总结现行标准对系统过电压运行要求的基础上,划分了工频过电压安全运行、禁止运行和待定3种情况。通过统计分析华北地区风电集中式送出系统各电压等级避雷器TOV耐受特性数据,扩展了电力系统短时限内工频过电压的安全运行限值。提出将0.1 s短时限内工频过电压上限由现行规定限值扩展至避雷器0.1 s工频耐受电压值,并形成了华北地区风电集中式送出系统35~1000 kV各电压等级系统分别在0.1 s内、0.1~0.5 s和0.5 s以上时的工频过电压安全运行建议。In the centralized wind power transmission system in north China,the operating requirements of short-time power-frequency overvoltage have not been explicitly stipulated in existing operating rules,and thus the upper limit of power-frequency overvoltage is extended based on the temporary overvoltage(TOV)withstand characteristics of arresters.The safe operation zone,prohibit operation zone and undetermined zone are defined through the generalization and analysis of existing operating rules of power-frequency overvoltage.According to the TOV withstand characteristic statistics of arresters in centralized wind power transmission systems in north China,the operating requirements of short-time power-frequency overvoltage are extended.The upper limit of power-frequency overvoltage in 0.1 s is suggested to be modified from the value in existing rules to the TOV withstand value of arresters.The safe operational suggestion on power-frequency overvoltage in different time ranges(within 0.1 s,0.1 to 0.5 s,and over 0.5 s)in north China power grids from 35 to 1000 kV is proposed.

关 键 词：风电集中式送出 暂态过电压 避雷器 工频电压耐受时间特性 

分 类 号：TM862[电气工程—高电压与绝缘技术] TM614