基于STATCOM/BESS的DFIG并网风电场无功控制策略  

Reactive Power Control Strategy of DFIG Grid-Connected Wind Farm Based on STATCOM/BESS

作　　者：匡威 匡洪海[1,2] 于锡琪 苏福清 陶成 KUANG Wei;KUANG Honghai;YU Xiqi;SU Fuqing;TAO Cheng(School of Electrical and Information Engineering,Hunan University of Technology,Zhuzhou 412007,China;Hunan Photovoltaic Smart Grid Control Engineering Research Center,Zhuzhou 412007,China;State Grid Zhuzhou Power Supply Company,Zhuzhou 412000,China)

机构地区：[1]湖南工业大学电气与信息工程学院,湖南株洲412007 [2]湖南省光伏智能电网控制工程研究中心,湖南株洲412007 [3]国网湖南省电力有限公司株洲供电分公司,湖南株洲412000

出　　处：《湖南电力》2022年第1期13-16,22,共5页Hunan Electric Power

基　　金：国家自然科学基金面上项目(51977072);湖北省重点实验室开放基金(2019KJX06)。

摘　　要：针对新能源大规模并网存在的系统稳定性问题,分析DFIG机组的无功补偿能力,在DFIG并网系统中引入了蓄电池储能型静止同步补偿器(STATCOM/BESS),提出一种利用STATCOM/BESS维持DFIG风电并网系统功率及电压稳定性的方法。该方法在传统STATCOM无功补偿的基础上,将蓄电池储能并联在其直流侧,可以快速、平滑地调节风电场输入并网点的有功功率并支撑系统电压稳定,能够达到削峰平谷的作用。对DFIG、STATCOM、STATCOM/BESS在系统发生三相接地故障时的无功补偿能力进行试验对比,结果表明装设STATCOM/BESS的系统电压跌落最小,且恢复速度最快、补偿效果最好。Aiming at the system stability problems existing in large-scale grid connection of new energy,this paper analyzes the reactive power compensation capacity of DFIG units,introduces battery energy storage static synchronous compensator(STATCOM/BESS)into DFIG grid connection system,and puts forward a method to maintain the power and voltage stability of DFIG wind power grid connection system by using STATCOM/BESS.Based on the traditional STATCOM reactive power compensation,the battery energy storage is connected in parallel on its DC side,which can quickly and smoothly adjust the active power of the wind farm input and network point,support the system voltage stability,and achieve the function of peak shaving and valley leveling.By comparing the reactive power compensation capability of DFIG,STATCOM and STATCOM/Bess in case of three-phase grounding fault,the results show that the system with STATCOM/Bess has the smallest voltage drop,the fastest recovery speed and the best compensation effect.

关 键 词：双馈异步风力发电机 静止同步补偿器 蓄电池储能 并网稳定性 

分 类 号：TM712[电气工程—电力系统及自动化]