直驱风电系统低电压运行特性研究  

Study on the low-voltage-ride-through capability of direct-driven wind power 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：《华北电力大学学报（自然科学版）》2012年第4期20-23,共4页Journal of North China Electric Power University：Natural Science Edition

摘　　要：针对永磁直驱风电系统,分析了机侧和网侧变流器的控制策略。为增强风电系统低电压穿越的能力,提出一种网侧变流器运行于无功优先输出模式的控制策略。在电网电压跌落时,风电机组可依据国网公司并网技术规范要求的电网的无功电流需求以及电网电压的跌落深度迅速向电网提供无功支撑,提升电网电压。仿真结果表明该控制策略可有效提高永磁直驱风电系统的低电压穿越能力。The control theory of motor-side and grid-side is analyzed in detail for the permanent magnet direct-driven wind power generation system. To improve the Low-voltage-ride-through （LVRT） Capability of Direct-driven Wind Power System, a new control strategy, which the grid-side operation in a reactive power output maximum mode, is proposed. Wind generators could rapidly provide some of reactive power supporting when the grid voltages drops to meet the requirements for on-grid wind farni by national grid corporation, therefore improve the grid voltages. Simulation resuits show that the new control strategy could effectively improve the LVRT capability of permanent magnet direct-driven wind power system.

关 键 词：风力发电 永磁同步发电机 低电压穿越 电压跌落 MATLAB/SIMULINK 

分 类 号：TM614[电气工程—电力系统及自动化]