海上风电用±550 kV直流GIS过电压与绝缘配合研究  

Research on Overvoltage and Insulation Coordination of±550 kV DC GIS for Offshore Wind Power

作　　者：苏鹏飞 袁艺嘉 孙亚辉 林志光 李元贞 SU Pengfei;YUAN Yijia;SUN Yahui;LIN Zhiguang;LI Yuanzhen(State Key Laboratory of Advanced Power Transmission Technology(State Grid Smart Grid Research Institute Co.,Ltd.),Changping District,Beijing 102209,China;State Grid Fujian EHV Company,Fuzhou 350013,Fujian Province,China)

机构地区：[1]先进输电技术全国重点实验室(国网智能电网研究院有限公司),北京市昌平区102209 [2]国网福建省电力有限公司超高压分公司,福建省福州市350013

出　　处：《全球能源互联网》2024年第4期463-472,共10页Journal of Global Energy Interconnection

基　　金：国家电网有限公司科技项目“换流站用±550 kV直流GIS关键技术研究”(5500-202147110A-0-0-00)。

摘　　要：海上风电经柔性直流送出已成为风电消纳的重要途径。直流气体绝缘开关设备(gas insulated switchgear,GIS)用于海上风电换流平台,可以降低整体海上换流站平台体积及设备造价,降低了海上设备的运维成本。围绕海上风电用±550 kV直流GIS的过电压与绝缘配合进行研究,首先确定柔直系统的结构与参数、控制保护策略和避雷器配置方案,进而通过仿真获得最大过电压水平,对于不同运行方式下故障极与非故障极的直流极线过电压进行分析,最后明确±550 kV直流GIS中避雷器参数与±550 kV直流GIS设备的绝缘水平要求。The VSC-HVDC transmission of offshore wind power has become an important way for wind power consumption.Direct current gas insulated switchgear(DC GIS)is used for offshore wind power converter platforms,which could reduce the overall platform volume and equipment cost of offshore converter stations,and reduce the operation and maintenance costs of offshore equipment.The overvoltage and insulation coordination of±550 kV DC GIS for offshore wind power have been studied.Firstly,the structure and parameters of VSC-HVDC system are studied.The control and protection strategies,and the configuration of surge arrester are given.Then,the maximum overvoltage level is obtained through the simulation.The DC pole line overvoltage of faulty pole and non-faulty pole under different operation modes are analyzed.Finally,the parameters of the arrester in±550 kV DC GIS and the insulation level requirements of the±550 kV DC GIS are given.

关 键 词：海上风电 柔性直流 ±550 kV直流GIS 过电压与绝缘配合 

分 类 号：TM721.1[电气工程—电力系统及自动化] TM614