超高速电机模型预测控制的静差消除双闭环控制策略研究  

Ultra-high Speed Motor Model Predictive Control’s Double Closed Loop Control Strategy of Static Difference to Eliminate

作　　者：王晓琳[1] 李志鹏[1] WANG Xiaolin;LI Zhipeng(Center for More-Electric-Aircraft Power System(Nanjing University of Aeronautics and Astronautics),Nanjing 210016,Jiangsu Province,China)

机构地区：[1]多电飞机与电气系统重点实验室(南京航空航天大学),江苏省南京市210016

出　　处：《中国电机工程学报》2023年第22期8897-8909,共13页Proceedings of the CSEE

基　　金：国家自然科学基金面上项目(52177048);江苏省自然科学基金面上项目(BK20201297)。

摘　　要：三矢量模型预测控制不仅可实现交直轴电流的无差拍控制,还具有良好的稳态性能。但应用于高基频低载波比的超高速电机控制系统时,仍存在电流跟踪静差、计算量大等缺陷。文中首先对传统三矢量模型预测控制进行等效控制集优化,在不影响控制性能的情况下,能够大大降低算法复杂度。同时,为提高预测电流误差消除的快速性,提出一种电流预测静差消除双闭环控制策略。设计自适应加权数据选择器,交直轴电流预测误差经自适应加权数据选择器后,通过调节器对逆变器模型角度进行补偿,从而形成内环;外环则由交直流预测电流跟踪误差反馈至电流给定值构成。在该双闭环控制系统中,内环实现了纯延时误差的全补偿,并优化非纯延时误差在交直轴上的分布;外环则能完全消除分布优化后的内环预测误差。仿真分析和实验结果证明了所提控制策略的可行性和有效性。The three-vector model predictive control can not only realize the dead beat control of quadrature and direct axis current,but also have good steady-state performance.However,when applied to the ultra-high speed motor control system of high fundamental frequency and low carrier ratio,there are still some defects such as static error of current tracking and large amount of calculation.In this paper,the equivalent control set optimization of traditional three-vector model predictive control is firstly carried out,which can greatly reduce the algorithm complexity without affecting the control performance.Meanwhile,in order to improve the speed of current prediction error elimination,a double closed-loop control strategy for current prediction static error elimination is proposed.An adaptive weighted data selector is designed,and the current prediction error of the inner loop is weighted and then negatively gives feedback to the inverter model angle as the inner loop.Quadrature and direct axis current prediction tracking error is fed back to the given current value to form the outer loop.In the double closed-loop control system,the inner loop can completely compensate the pure delay error and optimize the distribution of the non-pure delay error along the quadrature and direct axis.In the outer loop,the prediction error of the inner loop is completely eliminated after compensation and distribution optimization.Simulation analysis and experimental results prove the correctness and effectiveness of the proposed control strategy.

关 键 词：模型预测控制 超高速电机 低载波比 自适应权重因子 静差消除双闭环 

分 类 号：TM351[电气工程—电机]