SVG对直驱风电场次同步振荡特性影响分析  

Influence Analysis of SVG on Subsynchronous Oscillation Characteristics of Direct-drive Wind Farm

作　　者：王大中 王玉鹏 WANG Dazhong;WANG Yupeng(Northeast Electric Power University,Jilin 132012,China)

机构地区：[1]东北电力大学,吉林吉林132012

出　　处：《吉林电力》2023年第6期21-26,共6页Jilin Electric Power

基　　金：国家自然科学基金委员会-国家电网公司智能电网联合基金资助项目(U186660001);新疆维吾尔自治区科技计划资助(2022B01016)。

摘　　要：针对静止无功发生器(static var generator,SVG)接入弱交流电网诱发直驱风电场次同步振荡(sub-synchronous oscillation,SSO)的现象,构建含SVG直驱风电联网系统线性化模型,基于特征值分析法,研究SVG控制参数、电网强度对系统稳定性及SSO特性的影响规律。研究结果表明,弱电网条件下,SVG电流内环控制是诱发直驱风电场联网系统SSO的主导环节;SSO的振荡幅值和频率与SVG控制器的电流内环比例、积分系数及电网强度多个因素相关。最后,通过PSCAD/EMTDC电磁暂态仿真和时频分析验证理论分析的有效性。Aiming at the sub-synchronous oscillation(SSO)of direct-drive wind farm induced by static var generator(SVG)connected to weak AC power grid,this paper constructs a linearization model of direct-drive wind power grid system with SVG,and studies the influence of SVG control parameters and power grid strength on system stability and SSO characteristics based on eigenvalue analysis.The research results show that SVG current inner loop control is the leading link to induce SSO of direct-drive wind farm networking system under weak power grid conditions;The oscillation amplitude and frequency of SSO are related to the current inner loop ratio,integral coefficient and power grid strength of SVG controller.Finally,the validity of the theoretical analysis is verified by PSCAD/EMTDC electromagnetic transient simulation and time-frequency analysis.

关 键 词：直驱风电场 静止无功发生器 次同步振荡 特征值分析法 

分 类 号：TM712[电气工程—电力系统及自动化]