基于电压电平的MMC模型预测控制  

Model predictive control of modular multilevel converter based on voltage level

作　　者：邵峰[1] 杨晋霞[2] SHAO Feng;YANG Jinxia(School of Electrical Engineering, Zhengzhou University of Science and Technology, Zhengzhou 450064, China;School of Information Engineering, Zhengzhou University of Science and Technology, Zhengzhou 450064, China)

机构地区：[1]郑州科技学院电气工程学院,河南郑州450064 [2]郑州科技学院信息工程学院,河南郑州450064

出　　处：《电力科学与技术学报》2020年第2期12-21,共10页Journal of Electric Power Science And Technology

基　　金：河南省教育厅自然科学研究重点项目(172102210114)。

摘　　要：为了实现对模块化多电平变换器(MMC)的优化控制,该文设计一种基于电压电平的MMC模型预测控制策略。基于桥臂电压和与差的关系推导MMC系统的数学模型,由数学模型设计具有分层结构的模型预测控制器;控制器中的成本函数设计综合考虑交流电流控制、环流抑制控制和桥臂能量平衡控制;成本函数将选择出最优电压电平为脉宽调制器提供电压参考。此外,子模块电容电压平衡控制使用单独的控制回路实现。最后,搭建MMC的半实物仿真测试系统。稳态和动态测试结果验证了新型控制策略的效果。In order to realize the optimal control of modular multilevel converter(MMC),a model predictive control strategy based on voltage level for MMC is designed.Based on the sum and difference of arm voltages,the mathematical model of MMC system is derived.Then a model predictive controller with hierarchical structure is designed by the mathematical model.The cost function design in the controller takes into account the AC side current control,the circulation current suppression and the arm energy balance.The cost function also selects the optimal voltage level to provide a voltage reference for the pulse width modulator.In addition,sub-module capacitor voltage balancing is accomplished with a separate control loop.Finally,the hardware-in-the-loop simulation test system for MMC is built.The steady-state and dynamic test results verified the effectness of the new control strategy.

关 键 词：模块化多电平变换器 环流 能量控制 模型预测控制 

分 类 号：TM46[电气工程—电器]