双级矩阵变换器高抗扰性解耦控制

Aiming at the two main drawbacks of conventional Two stage Matrix Converters(TSMC): high coupling influence and low immunity to abnormal working conditions.Conventional space vector modulation strategy(SVM)is unable to solve these two problems because of its approximate open-loop control. Model predicted control which decouples the rectifer and inverter for TSMC was proposed to overcome the above problems.The proposed control scheme selects the switching state that minimizes the instantaneous input reactive power and the error of the output currents according to their reference values. This was achieved by using a prediction horizon of one sample time and a very intuitive control law.Finally,TSMC was decoupled by model predicted control and always achieves excellent input and output performance regardless of normal and abnormal working conditions.A performance comparison of respect a standard model predicted control and SVM modulation strategy of TSMC was provided to explore the decoupling control mechanism of model predicted control used for TSMC, This project has the important meaning to solve the coupling and robustness problems for Matrix Converter.

针对双级矩阵变换器(Two Stage Matrix Converter,TSMC)一体化拓扑带来的耦合影响和弱抗扰性两个固有缺陷，传统空间矢量调制策略需两级协调而相互影响并是一种近似开环控制，更加剧了上述两个问题的产生。 针对上述问题，研究一种TSMC解耦控制算法-模型预测控制，利用TSMC离散数学模型和72种开关状态，以输入无功和输出电流为控制目标，通过一个采样周期水平上预测和直观控制，选择合适开关状态，在正常和非正常工况下均能实现输入瞬时无功功率和输出电流参考误差最小，从而消除TSMC整流与逆变级耦合影响和提高非正常工况下系统抗扰性，时刻确保输入输出性能。最后对TSMC模型预测控制和空间矢量调制策略进行比对研究，以探索模型预测算法实现TSMC解耦控制的机理。本课题对于解决矩阵变换器耦合问题和抗扰性问题具有重要借鉴意义。

针对双级矩阵变换器(Two Stage Matrix Converter,TSMC)一体化拓扑带来的耦合影响和弱抗扰性两个固有缺陷，传统空间矢量调制策略需两级协调而相互影响并是一种近似开环控制，更加剧了上述两个问题的产生。.针对上述问题，研究一种TSMC解耦控制算法—模型预测控制，利用TSMC离散数学模型和72种开关状态，以输入无功和输出电流为控制目标，通过一个采样周期水平上预测和直观控制，选择合适开关状态，在正常和非正常工况下均能实现输入瞬时无功功率和输出电流参考误差最小，从而消除TSMC整流与逆变级耦合影响和提高非正常工况下系统抗扰性，时刻确保输入输出性能，实现了TSMC解耦控制。最后对TSMC模型预测控制和空间矢量调制策略进行比对研究，以探索模型预测算法实现TSMC解耦控制的机理。.通过本项目研究，获得了TSMC数学模型和开关状态表，利用模型预测控制提高了TSMC抗扰性，实现了TSMC解耦控制，在不增加任何硬件前提下，利用一套算法同时兼顾了TSMC正常和非正常两种工况。通过比对研究和实验手段，证明了TSMC模型预测控制抗扰性优于传统控制矢量，道明了模型预测控制能从算法上弥补TSMC拓扑带来的固有缺陷，两者结合能使TSMC获得更多优异性能。本课题对于解决矩阵变换器耦合问题和抗扰性问题具有重要借鉴意义。