永磁风电系统低电压穿越控制策略研究  

Improved Control Strategy for Low Voltage Ride-through of Permanent Magnet Direct-driven Wind Power Generation System

作　　者：郑荣美[1] 朱凌[1] 

机构地区：[1]华北电力大学电气与电子工程学院,河北保定071003

出　　处：《电力科学与工程》2012年第4期14-18,共5页Electric Power Science and Engineering

摘　　要：针对Boost升压型永磁直驱型风电系统,分析了其发电机侧和网侧变流器的控制策略。为增强其低电压穿越能力,提出了一种基于转子储能和网侧无功优先输出的控制策略。通过减小发电机的有功输出来降低直流侧过电压,通过控制网侧无功输出来提升电网电压。基于Matlab/Simulink 7.10搭建了仿真模型。仿真结果证明了该控制策略的有效性。Based on the boost chopper converter of the permanent magnet direct-driven wind power generation sys- tem, The control strategies for generator-side converter and grid-side converter are analyzed. To improve the low voltage ride-through （LVRT） capability of direct-driven wind turbine system, based on the rotor energy storage and reactive power output maximum are proposed . The active power of generator-side converter is introduced to genera- tor in order to limit the electromagnetic power of the generator and decrease the DC-link overvoltage, the grid-side converter according to the grid voltage drop depth, exports reactive power rapidly to increase the grid-side voltage. Matlab/Simulink 7. 10 model was set up, and the system simulation verify the validity and the feasibility.

关 键 词：风力发电 电压跌落 低电压穿越 永磁同步发电机 BOOST 

分 类 号：TM614[电气工程—电力系统及自动化]