基于定子电压定向的双馈风电系统变参数策略设计  

Stator Voltage Oriented Variable-parameter Control Strategy for Wind Turbine Driven Doubly Fed Induction Generator

作　　者：徐君[1] 黄晓波[1] 刘昌金[1] 陈敏[1] 徐德鸿[1] 

机构地区：[1]浙江大学电气工程学院,浙江省杭州市310027

出　　处：《电力系统自动化》2010年第18期90-94,共5页Automation of Electric Power Systems

摘　　要：介绍了基于定子电压定向的双馈风力发电系统在空载并网和并网发电2种模式下的模型,分析对比了其差异性。为保证在2种模式下控制系统均有较好的稳态性能和动态性能,提出了一种变参数控制策略,即在2种模式下分别采用不同的电流控制器。给出了一种基于比例—积分(PI)电流控制器的设计原则,利用伯德图法对2种模式下的电流控制器参数分别进行了设计,设计结果表明2种控制器参数有较大差异,在2种控制模式下采用同样的电流控制器会降低系统的动态性能甚至导致系统不稳定。在30kW双馈风力发电系统实验平台上进行了实验验证,实验结果表明,变参数控制策略可以保证系统在2种模式下均有较好的稳态性能和动态性能。A wind turbine driven doubly fed induction generator（DFIG）model in both no-load cut in control mode and grid connecting control mode based on stator voltage orientation technique is introduced,and the difference in the two modes is analyzed.In order to keep the steady and dynamic performance in the two modes,a variable-parameter control strategy is proposed using different parameters for the rotor current controller.Design principles for the PI based current controller are given.The Bode diagram is used to design the parameters for the two modes.The result shows that the designed parameters are significantly different for the two modes.If the same parameters are used in the two control modes,it may lead to the system unstability or poor dynamic performance.Tests on a 30 kW wind turbine driven DFIG platform are implemented and the results demonstrate that the variable-parameter control strategy can ensure satisfactory steady and dynamic performance of the system in the two modes.

关 键 词：双馈感应发电机 矢量控制 变参数控制 定子电压定向 风力发电 

分 类 号：TM614[电气工程—电力系统及自动化]