双馈风力发电系统故障穿越性能改善的控制策略  

Control strategy of fault ride-through performance improvement for double-fed wind turbine generation system

作　　者：高仕红[1] 

机构地区：[1]湖北民族学院信息工程学院,湖北恩施445000

出　　处：《可再生能源》2016年第6期828-836,共9页Renewable Energy Resources

基　　金：湖北省自然科学基金项目(2011CDC016)

摘　　要：PI控制策略限制了双馈风力发电系统的故障穿越能力。文章提出一种基于多开关控制的故障穿越策略,在机端电压跌落瞬态期间利用多态滞环电流矢量控制器快速的瞬态性能抑制转子绕组的过电流,同时实施转子绕组串联动态电阻器,进一步抑制转子绕组的过电压和过电流。详细介绍了多态滞环电流矢量控制器和基于多开关控制的故障穿越策略的实施过程。针对3种典型机端电压跌落类型,在Matlab/Simu1ink平台中构建了所提出的故障穿越控制策略的动态仿真模型并验证了其可行性。仿真结果表明,所提出的故障穿越控制策略改善了双馈风力发电机系统的故障穿越性能。The conventional control strategy（e.g., PI control） limited the fault ride-through capability of doubly-fed wind turbine generation system. So a fault ride-through strategy-based multi-switch control is proposed. Using the fast transient performance of multilevel hysteresis current vector controller, the overcurrent of rotor windings is suppressed during the transient period of terminal voltage dip. Meanwhile, a set of dynamic resistors in series with the rotor windings are implemented,which further restrains the overvoltage and overcurrent of the rotor windings. The implementation processes of the multilevel hysteresis current vector controller and the fault ride-through strategy-based multi-switch control are introduced in detail. Aiming at three typical terminal voltage dip types of DFIG, the dynamic simulation model of the proposed fault ride-through control strategy is built on Matlab/Simulink platform, and its feasibility is validated. The simulation results show that the proposed fault ride-through control strategy improves the fault ride-through performance of doubly-fed wind turbine generation system.

关 键 词：双馈风力发电系统 故障穿越策略 多开关控制 多态滞环电流矢量控制 动态电阻器 

分 类 号：TM641[电气工程—电力系统及自动化]