叶文瑶,陆翌,钱政旭,许烽,陆承宇,张哲任,徐政
YE Wenyao,LU Yi,QIAN Zhengxu,XU Feng,LU Chengyu,ZHANG Zheren,XU Zheng

• 1:浙江大学工程师学院
• 2:国网浙江省电力有限公司电力科学研究院
• 3:浙江大学电气工程学院

摘要(Abstract)：

海上风电中频汇集柔性直流送出方案凭借其经济优势已成为远海风电开发的重要选择，其中过电压与绝缘配合是制约工程实施的关键技术瓶颈。参考江苏某工程构建仿真模型，分析了50 Hz、100 Hz、120 Hz和150 Hz运行频率下的换流站过电压特性和设备绝缘水平。首先，给出了不同运行频率下的换流站主回路参数和避雷器配置方案；随后，基于PSCAD/EMTDC平台对配置和未配置避雷器两种情况进行了故障仿真；最后，根据仿真结果总结了交流系统频率提升对过电压特性的影响规律，并确定了不同频率下的换流站设备绝缘水平。仿真结果显示，提高海上交流系统运行频率会显著影响换流站过电压特性，但在合适的避雷器配置参数下设备的绝缘水平不会改变。
The economic advantages of medium-frequency AC collection and flexible DC transmission make it a key choice for deep-sea wind power development, where overvoltage and insulation coordination emerge as critical technical bottlenecks. Taking a project in Jiangsu as a reference, this paper constructs a simulation model to analyze the overvoltage characteristics and equipment insulation levels of the converter station under operating frequencies of 50 Hz, 100 Hz, 120 Hz, and 150 Hz. First, the main circuit parameters and surge arrester configurations of the converter station under different operating frequencies are provided. Then, fault simulations are carried out on the PSCAD/EMTDC platform for both configured and unconfigured surge arrester cases. Finally, the impact of elevated AC system frequency on overvoltage characteristics is summarized, and the insulation levels of converter station equipment under different frequencies are determined based on the simulation results. The simulation results show that elevating the operating frequency of the offshore AC system will significantly affect the overvoltage characteristics of the converter station. However, with proper surge arrester configuration, the insulation level of the equipment will not change.

关键词(KeyWords)： 远海风电;中频汇集;频率提升;过电压;绝缘配合;避雷器配置
deep-sea wind farm;medium-frequency collection;frequency elevation;overvoltage;insulation coordination;surge arrester configuration

Abstract:

Keywords:

基金项目(Foundation): 国家电网有限公司科技项目（5500-202319103A-1-1-ZN）

作者(Author): 叶文瑶,陆翌,钱政旭,许烽,陆承宇,张哲任,徐政
YE Wenyao,LU Yi,QIAN Zhengxu,XU Feng,LU Chengyu,ZHANG Zheren,XU Zheng

DOI: 10.19585/j.zjdl.202510001

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