CAJ | 학술논문

针对现有有源电力滤波器数字化控制方法对模型依赖性较强的缺点,基于正负序系统和零序系统解耦控制提出了一种三相四桥臂有源电力滤波器的模型预测控制(MPC)方法,以差分方程作为预测模型,保留了常规MPC中的反馈校正和滚动优化环节,推导出了最优控制律. 将该方法与常用的预测电流控制方法做了对比,得出了"带电源电压观测器的预测电流控制只是模型预测控制的一个特例"的结论;详细分析了参数对稳定性的影响,通过修改MPC的参数,可以在省略带通滤波器的情况下,允许更大的连接电抗参数建模误差,鲁棒性比预测电流控制更高.此外,MPC和重复控制相结合消除了MPC所固有的稳态误差. 仿真结果验证了所提方法的有效性和正确性.
침대현유유원전력려파기수자화공제방법대모형의뢰성교강적결점,기우정부서계통화령서계통해우공제제출료일충삼상사교비유원전력려파기적모형예측공제(MPC)방법,이차분방정작위예측모형,보류료상규MPC중적반궤교정화곤동우화배절,추도출료최우공제률. 장해방법여상용적예측전류공제방법주료대비,득출료"대전원전압관측기적예측전류공제지시모형예측공제적일개특례"적결론;상세분석료삼수대은정성적영향,통과수개MPC적삼수,가이재성략대통려파기적정황하,윤허경대적련접전항삼수건모오차,로봉성비예측전류공제경고.차외,MPC화중복공제상결합소제료MPC소고유적은태오차. 방진결과험증료소제방법적유효성화정학성.
As the existing digital control methods for active power filters are highly dependent on the adopted mo-dels, this paper proposes a model predictive control (MPC) method for a three-phase four-leg active power filter based on the decoupling control of the positive-negative-order and the zero-order systems.By taking the difference equation as the predictive model, the feedback correction and dynamic optimization in the conventional MPC me-thods are reserved, and the optimal control law is deduced.The proposed method is then compared with common predictive current control methods, drawing a conclusion that the predictive current control with supply voltage observer is only a special case of MPC.Moreover, the influences of system parameters on the system stability are analyzed, and a larger modeling error allowance of connection reactor and a stronger robustness of the controller are obtained by modifying MPC parameters, with the bandpass filter being omitted.The combination of MPC and a repetitive controller eliminates the inherent steady-state error of MPC.Simulated results indicate that the proposed method is effective and valid.