无刷双馈风力发电机最大风能捕获仿真  

Simulation of Maximum Wind Energy Capture for Brushless Doubly Fed Wind Generator

作　　者：李冰[1,2] 刘石[3] 

机构地区：[1]华北电力大学能源动力与机械工程学院,北京102206 [2]华北电力大学科技学院,保定071000 [3]华北电力大学控制与计算机工程学院,北京102206

出　　处：《计算机仿真》2018年第1期83-87,274,共6页Computer Simulation

基　　金：中央高校基本科研业务费专项资金资助(2017MS186);高等学校学科创新引智计划(B13009);国家自然科学基金项目(61571189)

摘　　要：为了最大限度地利用风能,提高风力发电系统的效率,实现无刷双馈风力发电机(BDFIG)的最大风能捕获,提出了一种针对无刷双馈风力发电机的直接功率控制策略。与矢量控制相比,直接功率控制(DPC)省去了复杂的坐标变换,计算量较小,结构简单,提高了系统的动态性能。通过设计滞环控制器与电压矢量表选择合适的电压矢量,能够实现无刷双馈发电机的有功功率与无功功率的解耦控制,并可以保证在风力机转速变化时,功率绕组的输出电流频率保持不变。利用MATLAB/Smulink搭建了无刷双馈风力发电机的直接功率控制模型,对不同风速时的无刷双馈风力发电机运行模式进行了仿真。仿真结果表明,所提方法能够实现对最大风能的快速捕获,并可以实现有功功率与无功功率的解耦控制,提高了无刷双馈风力发电系统的发电效率。ABSTRACT：In order to maximize the utilization of wind energy, improve the efficiency of wind power generation system, and realize the maximum power point tracking（MPPT） of brushless doubly fed induction generator （ BDFIG）, a direct power control（DPC） strategy is proposed to realize the variable speed constant frequency of BDFIG. Com- pared with vector control, the main advantages of DPC are without coordinate transformation, low computational load, simple structure and the improved system dynamic properties. Using two hysteresis comparators and votage vector ta- ble to choice proper voltage vector can realize the control of the active power and reactive power independently. By es- tablishing the DPC control system based on MATLAB/Simulink, the operation mode of BDFIG wind generator was simulated with different wind speeds. The simulation results show that the proposed method can achieve maximum wind energy capture by decoupling control on the output of active power and reactive power, and enhanced the utiliza- tion efficiency of BDFIG.

关 键 词：无刷双馈发电机 直接功率控制 最大风能捕获 变速恒频 风力发电 

分 类 号：TM743[电气工程—电力系统及自动化]