基于电压矢量闭环双馈风力发电空载并网策略  

No-load Cut-in Control Strategies for DFIG Based on Stator Voltage Space Vector Close Loop

作　　者：曾志勇[1] 王清灵[1] 冯婧[1] 

机构地区：[1]安徽理工大学电气与信息工程学院,安徽淮南232001

出　　处：《电气传动》2010年第6期3-7,19,共6页Electric Drive

摘　　要：电压开环双馈电机空载并网方式缺少对定子电压的直接有效控制,存在定子电压相位、幅值极易受参数变化的影响、端电压幅值低频脉动的缺点,并网过程中易产生较大的冲击电流,影响电网的稳定运行。分析了基于定子电压瞬时值闭环控制的基本原理和控制策略,对转子电流进行了线性化解耦控制。通过仿真验证了采用电压闭环控制,定子电压对电网电压具有较强的跟随性能,提高了定子端电压的控制精度,并网过程冲击电流较小,电压闭环空载并网是一种理想的并网方式。Considering the stator voltage open loop control-based cut-in control strategy lack direct control on stator voltage,the stator voltage amplitude contain low frequency pulsating movement and stator voltage amplitude and phase highly depend on parameter of electric machine,large impact current jeopardizes the grid safety and steady.The fundamental principle and control strategy with stator voltage space vector close loop were analyzed.Rotor current was linearized decoupling control.Simulation results indicate the stator voltage can preferably follow the grid voltage with voltage closed loop control.It improves the precision of the no-load stator voltages,and the impact current is very small.The control strategy with stator voltage space vector close loop is relatively ideal cutting-in approach.

关 键 词：双馈电机 空载并网 电压矢量闭环 

分 类 号：TM614[电气工程—电力系统及自动化]