作　　者： ; ; ; ;

机构地区： 广东工业大学自动化学院

出　　处： 《广东电力》 2012年第8期61-67,90,共8页

摘　　要： 针对变速、恒频风力发电系统具有非线性、强耦合的特点,结合无刷双馈电机的结构特点及基本理论,导出其在发电状态下的转子速dq轴电压、电流方程式,并以此为基础构建了无刷双馈发电机(brushless doubly-fed generator,BDFG)在双同步坐标系下的数学模型。对控制绕组子系统对应的转子磁链进行观测,引入自抗扰控制(active-disturbance rejection control,ADRC)策略实现转速解耦控制,使发电机转速跟踪风速变化,获得最佳叶尖速比;调节控制绕组频率,在低风速下可达到最大风能跟踪控制和变速恒频发电的目的。仿真结果表明:磁链观测器能较准确估计控制绕组子系统对应的转子磁链,ADRC受系统参数变化的影响较小,具有较强的鲁棒性和适应性,改善了系统的控制品质,验证了控制策略的可行性。 Aiming at nonlinearity and close coupling of variable speed generator and frequency constant generator system, the paper, in combination with structural characteristics and basic principles of brushless doubly-fed generator, derives voltage and current equation at axis dq of stator rotating speed in generating state, on the basis of which it establishes mathematic model of brushless doubly-fed generator （BDFG） in double synchronous coordinate system. By observing rotator flux corre- sponding to winding control subsystem, the paper introduces active-disturbance rejection control （ADRC） for implementation of rotating speed decoupling control to enable rotating speed of generator to follow wind speed and obtain speed ratio of blade tip; it adjusts winding control frequency to achieve tracking control over maximum wind energy and speed-varied frequency-constant power generation. The simulation result shows that rotator flux observer can accurately evaluate rotator flux corresponding to winding control subsystem; ADRC can be scarcely influenced by parameter change of the system and it is of greater robustness and adaptability, improving control quality of the system and verifying feasibility of control strategy.

关 键 词： 风力发电系统 无刷双馈发电机 最大风能跟踪控制 自抗扰控制 转速解耦 磁链观测

领　　域： [电气工程] [自动化与计算机技术] [自动化与计算机技术]