单相三电平脉冲整流器模型预测直接功率控制

发布时间：2018-08-07 12:07

【摘要】：该文以CRH_2(China railways highspeed-2)型高速电动车组牵引整流器为研究对象,以提高整流器响应速度和控制精度为研究目标。首先,给出整流器在d-q同步旋转坐标系下的数学模型,并给出d-q轴坐标分量的计算方法;然后,建立单相整流器瞬时功率数学模型,进而提出一种具有直流侧电容电压平衡功能的模型预测直接功率控制(model predictive direct power control,MP-DPC),在此基础上,为降低该算法的复杂度,提出一种简易开关序列选择方法,与基于比例积分调节器的传统直接功率控制(proportional integral-based direct power control,PI-DPC)算法相比,该MP-DPC算法不仅提高了整流器的动态响应速度,而且考虑了中点电位的平衡控制对整流器瞬时功率的影响,无需功率内环PI控制器;最后,对该MP-DPC算法与传统定频PI-DPC算法进行了半实物实验对比验证,实验结果证明了所提控制算法的正确性。
[Abstract]:This paper takes the CRH_2 (China railways highspeed-2) high speed EMUs traction rectifier as the research object, in order to improve the response speed and control precision of the rectifier. First, the mathematical model of the rectifier in the d-q synchronous rotating coordinate system is given, and the calculation method of the coordinate component of the d-q axis is given. Then, the single-phase rectifier transient is established. In order to reduce the complexity of the model predictive direct power control (MP-DPC), a model predictive direct power control (direct power control, MP-DPC) with a DC side capacitance voltage balance function is proposed, and a simple switch sequence selection method is proposed and the traditional direct work based on the proportional integral regulator is proposed. Compared with the proportional integral-based direct power control (PI-DPC) algorithm, the MP-DPC algorithm not only improves the dynamic response speed of the rectifier, but also considers the effect of the balance control of the midpoint potential on the instantaneous power of the rectifier, without the need for the power inner loop PI controller. Finally, the MP-DPC algorithm and the traditional fixed frequency PI-DPC algorithm are used. A semi physical experiment is carried out to verify the correctness of the proposed control algorithm.
【作者单位】：磁浮技术与磁浮列车教育部重点实验室(西南交通大学电气工程学院);
【基金】：国家自然科学基金项目(51277153,51207131) 中央高校基本科研业务费专项资金(2682013CX017) 高铁联合基金重点项目(U1134205)~~
【分类号】：TM461

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