舒胜文　刘　畅（. 国网福建省电力有限公司电力科学研究院，福州　350007；. 国网福建省电力有限公司福州供电公司，福州　350009）



选相抑制1000kV线路合闸过电压的仿真研究

舒胜文1刘畅2
（1. 国网福建省电力有限公司电力科学研究院，福州350007；2. 国网福建省电力有限公司福州供电公司，福州350009）

摘要为分析选相技术抑制1000kV空载输电线路合闸过电压的效果，首先研究了断路器的合闸预击穿特性和目标合闸相位，然后利用PSCAD/EMTDC软件的自定义模块建立了能考虑合闸预击穿特性及选相控制策略的合闸模型，最后对应用选相技术的1000kV空载线路统计合闸过电压进行了仿真分析，并与随机合闸、加装合闸电阻和金属氧化物避雷器下的统计过电压倍数进行了对比。结果表明：采用选相合闸技术配合避雷器的过电压抑制方式能将计划合闸过电压限制在1.6p.u.以下，将单相重合闸过电压限制在1.7p.u.以下，满足相关标准的要求，同时能够降低避雷器的吸收能量，并有效改善合闸的过渡过程。

关键词：1000kV输电线路；合闸过电压；选相；预击穿；合闸电阻；金属氧化物避雷器

Simulation Research on Limit of Closing Overvoltages by Phase-controlled Technology in 1000kV Transmission Lines

Shu Shengwen1Liu Chang2
（1. Electric Power Research Institute of State Grid Fujian Electric Power Co.， Ltd， Fuzhou350007; 2. Fuzhou Power Supply Company of State Grid Fujian Electric Power Co.， Ltd， Fuzhou350009）

Abstract In order to analyze the limit effect of the phase-controlled technology on closing overvoltages of 1000kV nonloaded transmission lines， the closing pre-strike characteristics and target closing phases of circuit breakers were studied firstly. And then， using the custom module in the PSCAD/EMTDC software， a closing model considering both closing pre-strike characteristics and phase-controlled strategy was developed. Finally， the statistics closing overvoltages of 1000kV nonloaded transmission lines were simulated， the multiple of statistics overvoltages using the phase-controlled technology was compared with that of random closing， installing closing resistor and metal oxide arrester. The results show that the phase-controlled technology in coordination with metal oxide arrester can limit the planned closing and single-phase reclosure overvoltages to be below 1.6p.u. and 1.7p.u.， respectively， which meet the requirements of relevant standards， also can reduce the absorbed energy by arresters and improve the closing transient process.

Keywords：1000kV transmission line; closing overvoltage; phase-controlled; pre-strike; closing resistor; metal oxide arrester

特高压交流电网具有长距离、大容量和低损耗的送电能力，是符合中国国情、适应未来电网发展趋势的输电方式[1-3]。当前，我国特高压交流输电工程的建设已达到高峰期。特高压输电技术的一个重要技术经济参数是绝缘水平，而与绝缘水平直接相关的是操作过电压倍数[4]。电网电压等级的提高对输电线路操作过电压允许值提出了更加严格的要求[5]。……