电网技术2025，Vol.49Issue(9)：3555-3565,中插2-中插5,15.DOI:10.13335/j.1000-3673.pst.2024.1230
陆上风电分频输电系统暂态过电压分析及抑制
Research on Transient Overvoltage Analysis and Suppression for Fractional Frequency Onshore Wind Power System
摘要
Abstract
As a new transmission method,Fractional frequency transmission uses lower frequencies to transmit electricity.It has received widespread attention in medium and long-distance offshore wind power,onshore wind power,and flexible interconnection of urban power grids.The overvoltage caused by system failures seriously affects the security and stability of electrical equipment and systems.In response to the unclear research status of the mechanism and characteristics of overvoltage generation in fractional frequency transmission systems,this paper conducts simulation analysis on the overvoltage distribution characteristics and the main factors affecting the overvoltage distribution of an 800MW onshore wind power fractional frequency system in Gansu province.It reveals the mechanism of system overvoltage generation under typical faults,quantitatively analyzes the impact of transformer wiring and interlocking on the overvoltage distribution characteristics of the fractional frequency system,and proposes a lightning arrester configuration scheme that considers both economic and technical indicators and is optimized comprehensively.This scheme can effectively suppress the system overvoltage level below 1.82 pu.The research results provide an important basis for designing fractional frequency transmission projects.关键词
分频输电/模块化多电平矩阵式换流器(M3C)/暂态过电压/避雷器配置/不对称故障Key words
fractional frequency transmission/modular multilevel matrix converter(M3C)/transient overvoltage/lightning arrester configuration/unsymmetrical faults分类
信息技术与安全科学引用本文复制引用
孔志达,宁联辉,黄阳,邢萧萧,刘永欢,赵勃扬,丁伟,吴广大,王庆建..陆上风电分频输电系统暂态过电压分析及抑制[J].电网技术,2025,49(9):3555-3565,中插2-中插5,15.基金项目
国家重点研发计划项目"柔性低频输电关键技术"(2021YFB2401100) （2021YFB2401100）
广东省电力设计研究院有限公司科技项目"换频站关键技术及接入系统研究(CG-2023-K-032)".Project Supported by National Key Research & Development Program of China"Key Technologies for Flexible Low Frequency Transmission"(2021YFB2401100)and the Science and Technology Project of Guangdong Electric Power Design Institute Co.,Ltd."Key Technologies and Access Systems for Frequency Converter Stations"(CG-2023-K-032). （CG-2023-K-032）
