矩阵整流器单周期控制策略的研究

Research on One-Cycle Control Strategy of Matrix Rectifier

单周期控制(OCC)是一种同时综合调制算法与控制策略的非线性控制技术,采用该控制技术的电力电子变换器具有控制电路简单、动态响应速度快、抗输入干扰性能好等优点。在分析单周期控制原理与矩阵整流器工作原理的基础上,提出了一种三相输入电流的单周期控制策略,使三相输入电流在每个开关周期内达到平衡,实现矩阵整流器单位输入功率因数的控制效果,同时为了弥补单周期控制对负载扰动抑制能力的不足,增加输出电压PID控制环节,改善负载调整率。在利用Matlab/Simulink完成单周期控制的矩阵整流器系统仿真后,采用数字积分技术和新型自举电源驱动技术实现了单周期控制的矩阵整流器系统。仿真分析结果与实验结果验证了矩阵整流器单周期控制模型的理论分析是正确的,控制效果是良好的。

One-cycle control （OCC） is a kind of nonlinear control technique which integrates modulation algorithm and control strategy. Power converters using OCC have many advantages, such as simply control circuit, fast dynamic response and good immunity on input disturbance. Based on the analysis of operation principle of OCC and matrix rectifier, one kind of three-phase input current OCC strategy is proposed, which makes the three-phase input current to achieve balance in a switching cycle, and to realize unity input power factor. In order to make up the insufficiency of OCC on load disturbance suppression, a PID controller is added on output voltage control to improve load regulation. After completing the system simulation of OCC on matrix rectifier in Matlab/Simulink, one physical matrix rectifier system is realized using the digital integral technology and a new bootstrap power supply. The simulation analysis results and the experimental results prove theoretical analysis on the OCC model of matrix rectifier, and the control effects are satisfactory.