基于能量解耦的MMC模型预测控制策略  

MMCModel Predictive Control Strategy Based on Energy Decoupling

作　　者：徐世周 裴天一 汪思奇 XU Shi-zhou;PEI Tian-yi;WANG Si-qi(Henan Normal University,Xinxiang 453000,China;不详)

机构地区：[1]河南师范大学,电子与电气工程学院,河南新乡453000 [2]国网河南省电力公司许昌供电公司,变电运维中心,河南许昌461000

出　　处：《电力电子技术》2024年第5期115-118,共4页Power Electronics

基　　金：河南省科技攻关项目(202102210299)。

摘　　要：模块化多电平换流器(MMC)目前已经成为高压直流输电(HVDC)领域中最先进的换流器拓扑,如何提高MMC的稳定性,有着重要的现实意义。模型预测控制(MPC)策略作为一种先进的控制技术,将其应用于MMC可以得到更好的控制效果。针对这个问题,此处研究了一种基于能量解耦的MPC策略,该策略对MMC中子模块能量进行了分析,并将其分为了外部能量和内部能量两个部分,首先对内部能量进行控制,通过调节桥臂间的能量平衡和相间的能量平衡来维持内部能量的平衡,然后再通过MPC对子模块电容电压进行直接控制,从而实现了内、外部能量的分层控制,实现了能量的解耦,从而可以有效地减轻控制器的复杂程度,提高系统的动态性能。最后通过与传统的MPC进行对比,仿真与实验结果表明了所提改进MPC策略的有效性。Modular multilevel converter(MMC)has become the most advanced converter topology in the field of high voltage direct current(HVDC).How to improve the stability of MMC has important practical significance.Model predictive control(MPC)strategy,as an advanced control technology,can be applied to MMC to get better control results.To solve this problem,an MPC strategy based on energy decoupling is studied,which analyzes the sub-module energy of MMC and divides it into two parts:external energy and internal energy.Firstly,the internal energy is controlled by adjusting the energy balance between the bridge arms and the energy balance between phases to maintain the internal energy balance.Then,the capacitor voltage of the sub-modules is directly controlled by MPC,thus realizing the layered control of internal and external energy and realizing the decoupling of energy,which can effectively reduce the complexity of the controller,improve the dynamic performance of the system.Finally,by comparing with the traditional MPC,the simulation and experimental results show the effectiveness of the proposed improved MPC strategy.

关 键 词：模块化多电平换流器 模型预测控制 能量解耦 

分 类 号：TM461[电气工程—电器]