双级矩阵变换器在统一潮流控制器中的应用研究

Study of the application of matrix converter in unified power flow controller

根据统一潮流控制器的基本原理,结合双级矩阵变换器的优越电气性能,研究采用双级矩阵变换器实现统一潮流控制器的方案。对统一潮流控制器建立两相同步旋转dq坐标系下的控制动态模型,解决如何利用逆变级变换器注入电网的电压的d、q轴分量控制线路潮流;提出对逆变级变换器采用三环解耦控制,从而提高了系统的动态响应能力和稳定性;分析了双级矩阵变换器的拓扑结构及其双空间矢量控制策略和换流特点。构建了基于双极矩阵变换器的统一潮流控制器的仿真实验系统模型。

A design scheme of unified power flow controller based on two-stage matrix converter by virtual of the UPFC’s fundamental principle,combining the superior electrical properties of TSMC,is studied.The paper designs a dynamic control model of UFPC in d and q-axis.The paper proposes to use d and q-axis component of the grid voltage injected by inverter-stage converter to control the transmission line power flow.A three-loop decoupling control strategy is used in inverter-stage converter. The strategy improves the dynamic performance and stability of UPFC.The topological structure of TSMC, the control strategy of double space vectors, and the trait of converting are analyzed in the paper.The simulation model for experiment based on TSMC is constructed.