CAJ | 학술논문

变步长爬山法能不依赖风速检测或风机功率—转速特性曲线而实现风力发电系统的最大风能跟踪,具有良好的应用前景.首先根据风机运行特性给出了直流机模拟风机方案,详细论述了变步长爬山法的原理及在双馈风力发电系统中的实现方法.然后将该方法应用于基于定子电压定向的双馈发电机矢量控制策略中,搭建了带直流机模拟风机的双馈风力发电系统实验平台.实验结果验证了在风速变化的情况下系统能自动搜索达到对应风速的最佳转速,实现风机最大风能捕获,并具有对快变风速的响应能力,验证了控制方案的正确性和可行性.
변보장파산법능불의뢰풍속검측혹풍궤공솔—전속특성곡선이실현풍력발전계통적최대풍능근종,구유량호적응용전경.수선근거풍궤운행특성급출료직류궤모의풍궤방안,상세논술료변보장파산법적원리급재쌍궤풍력발전계통중적실현방법.연후장해방법응용우기우정자전압정향적쌍궤발전궤시량공제책략중,탑건료대직류궤모의풍궤적쌍궤풍력발전계통실험평태.실험결과험증료재풍속변화적정황하계통능자동수색체도대응풍속적최가전속,실현풍궤최대풍능포획,병구유대쾌변풍속적향응능력,험증료공제방안적정학성화가행성.
@@@@Variable-step Hill Climbing Searching (HCS) can realize Maximum Power Point Tracking (MPPT) of Doubly-Fed Induction Generator (DFIG) wind power generation system without measuring the wind velocity or obtaining the wind turbine’s power-speed curve, and has a brilliant future. This paper firstly proposes a wind turbine imitation method based on its operation characteristics. Then, a DFIG MPPT control strategy based on variable-step HCS is presented. Then the method is applied to the DFIG vector control strategy directed by stator voltage. At last, an experiment platform with DC simulation machine is built. The experiment results show that the proposed variable-step HCS can not only search the optimum speed automatically and realize MPPT, but also has the ability of responding to the polytropic wind. The feasibility and effectiveness of proposed control strategy are validated.