TSMC混合变压器的预测控制研究

针对目前混合变压器拓扑所存在的电路结构不紧凑、调制策略复杂、换流繁琐等问题,提出了一种基于双级矩阵变换器(Two-stage Matrix Converter, TSMC)的混合变压器拓扑。对TSMC混合变压器的拓扑结构、工作原理进行了分析。考虑到TSMC混合变压器在调节负载电压时需要较快的动态响应速度,提出了TSMC混合变压器的模型预测控制策略。建立了拓扑的离散状态空间模型,通过对负载电压与输入无功功率进行两步预测,实现对延时效应的补偿。根据两步预测值设计目标函数,利用目标函数预先评估各个开关状态的控制效果来控制开关状态,从而提高控制系统的动态响应速度。最后采用Matlab/Simulink工具建立了TSMC混合变压器系统的仿真模型。仿真结果验证了所提拓扑的可行性以及所提控制策略的良好动态特性。

Research on predictive control about TSMC hybrid transformer

A hybrid transformer topology based on Two-Stage Matrix Converter (TSMC) is proposed to solve the problems of compact circuit structure, complex modulation strategy and complicated commutation in current hybrid transformer topology. The topological structure and working principle of TSMC hybrid transformer are analyzed. Considering that the TSMC hybrid transformer needs a faster dynamic response speed, the model predictive control strategy of TSMC hybrid transformer is proposed. A topological discrete state space model is established to compensate the delay effect by two-step prediction of load voltage and input reactive power. According to the two-step predictive value, the objective function is designed to evaluate the control effect of each switch state in advance to control the switch state, so as to improve the dynamic response speed of the control system. Simulation model of the TSMC hybrid transformer system is established by using the Matlab/Simulink tool. Simulation results verify the feasibility of the proposed topology and the good dynamic characteristics of the proposed control strategy. This work is supported by National Natural Science Foundation of China (No. 51277156 and No. 51307148).