摘要
针对成都地铁10号线能量回馈装置采用的共直流母线并联逆变器,为改善传统基于PI控制器的控制算法的动态性能,给出了一种固定开关频率的模型预测控制算法。该算法通过针对逆变器建立的数学模型得到电流预测值,并将电流预测值代入到评价函数,使评价函数的偏导数为零得到对应的最优调制函数。为了消除由两个逆变器参数的差异而导致的零序环流,给出了一种基于PI控制器的环流抑制方案,并基于MATLAB/Simulink对算法的可行性及性能进行验证。
With regard to the common DC busbar parallel inverter adopted by the energy feedback devices of Line 10 of Chengdu Metro,for the purpose of improvement of dynamic performance of PI-based traditional control algorithm,a model predictive control algorithm for a fixed switching frequency is proposed.The algorithm is able to obtain the current predictive value via the algorithm model established with regard to the inverter,and it is able to substitute the predicted current value into the evaluation function,so that the corresponding optimal modulation function can be obtained when the partial derivative of the evaluation function is zero.In order to eliminate the zero sequence circulating current caused by the difference in the parameters of two inverters,a circulating current suppression scheme based on a PI controller is proposed,and the feasibility and performance of the algorithm are verified based on MASTLAB/Simulink.
出处
《电气化铁道》
2023年第2期63-68,共6页
Electric Railway
关键词
能量回馈装置
并联逆变器
模型预测控制
环流抑制
energy feedback device
paralleled inverters
model predictive control
circulating current suppression
