共查询到10条相似文献,搜索用时 46 毫秒
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双馈感应风力发电机的无源性控制方法研究 总被引:1,自引:0,他引:1
基于双馈感应风力发电机Euler-Lagrange系统模型,设计了本质上是非线性反馈的无源性控制(PBC)策略,实现了负载转矩时变未知情形下磁链、转速的渐近跟踪控制.针对实际运行时风力发电机参数具有不确定性的问题,将PBC方法与自适应控制相结合,不仅可实现电机参数摄动时期望电流轨迹的准确跟踪,并可有效抑制由电阻、电感变化引起的跟踪误差.该方法从能量角度分析风力发电控制系统,确定不必抵消的"无功力",设计全局定义的控制律,具有形式简单、无奇异点、鲁棒性好等特点.基于dSPACE 的实验结果证明了该控制策略的有效性. 相似文献
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带有RCC的异步风力发电机系统的特性分析 总被引:2,自引:0,他引:2
介绍了带有转子电流控制器(RCC)的变桨距调节异步风力发电机系统的基本原理及其控制策略。基于Saber仿真软件,建立了变桨距风力机、绕线式异步发电饥、转子电流控制器以及风速等的仿真模型,并以此为基础深入研究了该类风力发电机系统的运行特性。仿真分析表明,引入转子电流控制可以明显改善发电机的输出电能品质,降低变桨距风力机的调节频率,延长变桨距机构的使用寿命。制作了一套7.5kW模拟异步风力发电机的RCC系统,对带有RCC的异步风力发电机系统进行了模拟实验研究。 相似文献
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Abrar ALLAG Abdelhamid BENAKCHA Meriem ALLAG Ismail ZEIN Mohamed Yacine AYAD 《Frontiers in Energy》2015,9(4):413
The problem of state feedback controllers for a class of Takagi-Sugeno (T-S) Lipschitz nonlinear systems is investigated. A simple systematic and useful synthesis method is proposed based on the use of the differential mean value theorem (DMVT) and convex theory. The proposed design approach is based on the mean value theorem (MVT) to express the nonlinear error dynamics as a convex combination of known matrices with time varying coefficients as linear parameter varying (LPV) systems. Using the Lyapunov theory, stability conditions are obtained and expressed in terms of linear matrix inequalities (LMIs). The controller gains are then obtained by solving linear matrix inequalities. The effectiveness of the proposed approach for closed loop-field oriented control (CL-FOC) of permanent magnet synchronous machine (PMSM) drives is demonstrated through an illustrative simulation for the proof of these approaches. Furthermore, an extension for controller design with parameter uncertainties and perturbation performance is discussed. 相似文献