故障时刻风电系统无功电压协调控制策略  

Coordinated var-voltage control during fault of wind power system

作　　者：王成福[1] 梁军[1] 冯江霞[1] 牛远方[2] 杨福[1] 

机构地区：[1]山东大学电气工程学院,山东济南250061 [2]山东电力工程咨询院,山东济南250013

出　　处：《电力自动化设备》2011年第9期14-17,22,共5页Electric Power Automation Equipment

基　　金：山东省自然科学基金资助项目(ZR2010EM055)~~

摘　　要：含Crowbar保护的风电场在实现低电压穿越功能的同时,由无功源转变为无功负荷,加剧故障系统负担。针对该问题,提出一种故障时刻的无功电压实时协调控制策略,并建立风电场实时协调控制系统(RTCCS)。该控制策略根据故障时电压水平及机组保护动作情况对风力发电系统的无功功率进行实时协调控制。考虑风电场无功电压调节需求,引入STATCOM补偿装置对其进行无功补偿。通过RTCCS的协调控制,可提高风电系统故障穿越能力,并能在故障时刻控制补偿单元及风电场为系统提供无功、电压支撑。通过仿真分析,验证了所提控制策略的正确性与有效性。The wind farm with Crowbar protection will change from reactive power source to reactive power load during the low-voltage ride-through,which aggravates the faulty power system. A real-time coordinated control strategy of reactive power and voltage is proposed and the RTCCS（Real Time Coordinate Control System） is built,which carries out the real time coordinated control of reactive power of wind farm according to the voltage level and the action of Crowbar protection during the fault. STATCOM is applied in RTCCS for reactive power compensation according to the var-vohage regulation requirement of wind farm. It improves the fault ride-through ability of wind farm and provides the reactive power and voltage support for power system during the fault. Its correctness and effectiveness are verified by simulative results.

关 键 词：风电 双馈感应发电机 无功功率 电压控制 静止无功补偿器 故障运行 协调 实时控制系统 

分 类 号：TM761.1[电气工程—电力系统及自动化] TM614