SVG虚拟磁链控制的大规模风电场暂态电压支撑策略  

Transient Voltage Support Strategy for Large-scale Wind Farm Based on SVG Virtual Flux Linkage Control

作　　者：李江成 徐贤 徐晓春[1] 丁波 徐智[1] 王力 LI Jiangcheng;XU Xian;XU Xiaochun;DING Bo;XU Zhi;WANG Li(State Grid Huai’an Power Supply Company,Huai’an 223002,China;State Grid Jiangsu Electric Power Co.,Ltd,Nanjing 210022,China)

机构地区：[1]国网淮安供电公司,淮安223002 [2]国网江苏省电力有限公司,南京210022

出　　处：《电力系统及其自动化学报》2025年第2期122-130,共9页Proceedings of the CSU-EPSA

基　　金：依托项目:国网江苏省电力有限公司科技项目(J2023067)。

摘　　要：为提高风电场的低-高电压连续故障穿越能力,提出一种基于虚拟磁链的静止无功发生器(static var generator,SVG)控制策略。首先,分析双馈感应发电机、调相机和SVG对暂态电压的支撑效果;其次,建立同步调相机与SVG的暂态无功响应模型,明确磁链不突变是两者暂态电压支撑差异的关键因素;再次,将调相机磁链守恒性质叠加到SVG暂态响应特性中,提出基于虚拟磁链的SVG控制策略,并调整控制器参数,确保SVG的无功响应能力最大化;最后,通过仿真验证提出的SVG控制策略对暂态低电压的支撑和过电压的抑制都有良好效果,能够提高风电机组的故障穿越能力。To improve the low-high voltage continuous fault ride-through capability of a wind farm,a control strategy of static var generator(SVG)based on virtual flux linkage is proposed.First,the support effects of a doubly-fed induction generator,a synchronous condenser and an SVG on transient voltage are analyzed.Second,a transient reactive power response model of the synchronous condenser and SVG is established,and it is pointed out that the flux linkage without mutation is the key factor for the difference of transient voltage support between the two devices.Third,the SVG control strategy based on virtual flux linkage is put forward by superimposing the flux linkage conservation property of the syn-chronous condenser onto the SVG’s transient response characteristics,and the controller parameters are adjusted to en-sure the maximum reactive power response capability of SVG.Finally,simulation results show that the proposed SVG control strategy has a good effect on both the support for transient low voltage and the suppression of overvoltage,so it can improve the fault ride-through capability of wind turbines.

关 键 词：交流汇集送出 电压跌落故障 暂态电压支撑 静止无功发生器 虚拟磁链 

分 类 号：TM614[电气工程—电力系统及自动化]