柔性直流输电系统中高频振荡研究综述  

Review of research on medium and high frequency oscillation in VSC-HVDC transmission system

作　　者：李奇南 孙宝奎 孙华东 张晓林 王子莹 陈鑫 LI Qinan;SUN Baokui;SUN Huadong;ZHANG Xiaolin;WANG Ziying;CHEN Xin(NARI Group Corporation(State Grid Electric Power Research Institute),Nanjing 211006,China;Beijing DC Transmission and Distribution Engineering Technology Research Center(China-EPRI Electric Power Engineering Co.,Ltd.),Beijing 102200,China;Beijing Institute of Smart Energy,Beijing 102299,China;State Grid Smart Grid Research Institute Co.,Ltd.,Beijing 102211,China)

机构地区：[1]南瑞集团有限公司(国网电力科学研究院),江苏南京211106 [2]北京市直流输配电工程技术研究中心(中电普瑞电力工程有限公司),北京102200 [3]北京智慧能源研究院,北京102299 [4]国网智能电网研究院有限公司,北京102211

出　　处：《电力自动化设备》2025年第1期156-171,共16页Electric Power Automation Equipment

基　　金：国家电网有限公司科技项目(5200⁃202356482A⁃3⁃2⁃ZN)。

摘　　要：近年来,国内外多个电压源型柔性直流输电工程中发生了中高频振荡现象,影响系统的安全稳定运行。针对柔性直流输电系统出现的中高频振荡问题,阐述了柔直换流站阻抗模型和状态空间模型的建立方法,交流系统数学模型建立方法。对使用阻抗分析法、特征值法进行系统稳定性分析的原理、方法进行了说明。基于换流器阻抗模型,分析了电压前馈、电流内环、锁相环、环流控制等因素对换流器阻抗特性的影响。归纳总结了现有中高频振荡抑制策略及其对柔性直流输电系统动态性能的影响,介绍了谐波保护方法。对中高频振荡问题的抑制措施研究进行展望,给出了未来研究方向建议。In recent years,medium and high frequency oscillations have occurred in many VSC-HVDC transmission projects at home and abroad,which affects the security and stability of power system operation.Aiming at the medium and high frequency oscillation problem in the VSC-HVDC transmission system,the establishing methods of impedance model and state space model for VSC-HVDC converter station,and the mathematical model for AC system are all expounded.The principles and methods of system stability analysis using impedance analysis method and eigenvalue method are described.The influence of voltage feedforward,current inner loop,phase-locked loop and circulating current control on the impedance characteristics of the converter is analyzed based on the converter impedance model.The existing medium and high frequency oscillation suppression strategies and their effects on the dynamic performance of the VSC-HVDC transmission systems are summarized,and the harmonic protection methods are introduced.The research on the suppression measures for medium and high frequency oscillation is prospected,and suggestions for future research fields are given.

关 键 词：阻抗模型 状态空间模型 抑制策略 中高频振荡 动态性能 谐波保护 柔性直流输电 

分 类 号：TM712[电气工程—电力系统及自动化] TM721.1