基于电压电平的MMC直接功率预测控制策略  

Direct Power Predictive Control Strategy of Modular Multilevel Converter Based on Voltage Level

作　　者：熊盛涛 刘振兴[2] 廖雪超[2] XIONG Shengtao;LIU Zhenxing;LIAO Xuechao(Wuhan City College,Wuhan 430081,China;Wuhan University of Science and Technology,Wuhan 430083,China)

机构地区：[1]武汉城市学院,武汉430081 [2]武汉科技大学,武汉430083

出　　处：《电力电容器与无功补偿》2022年第4期131-138,共8页Power Capacitor & Reactive Power Compensation

基　　金：武汉城市学院院级科研基金(2022CYZDKY03)

摘　　要：针对模块化多电平变流器(MMC)传统控制复杂的问题,本文提出了一种基于电压电平的MMC直接功率预测控制策略。与预测电流控制器相比,该控制策略的优点是不需要锁相环采集角度信息,能够摆脱旋转变换和内环电流计算。此外,所提控制策略采用三相统一控制,无需逐项控制,简化了控制结构。本文首先建立了MMC的数学模型,接着给出了所提控制策略的设计思路以及控制框图,最后在Matlab/Simulink平台上进行了仿真验证。结果表明:所提策略在降低功率纹波和功率追踪方面具有显著优势,并且在暂态和网侧电感参数失配的情况下,仍能达到良好的控制效果,具有鲁棒性和快速响应能力。In view of complexity of traditional control of modular multilevel converter(MMC),a kind of predictive power control strategy based on voltage level is proposed in this paper. Compared with the predictive current controller,the advantage of the proposed control strategy is that it does not need the phase locked loop to collect angle information,and can get rid of the rotation transformation and inner loop current calculation.In addition,the proposed control strategy adopts three-phase unified control,which simplifies the control structure without the need item by item control. Firstly,the mathematical model of MMC is set up. Then,the design idea and control block diagram of the proposed control strategy are given. Finally,the simulation verification is performed on the MATLAB/Simulink platform. The results show that the proposed strategy has significant advantages in the aspects of reducing power ripple and power tracking and can,in the case of mismatch of transient and grid side inductance parameter,still achieve good control effect,have robustness and fast response ability.

关 键 词：模块化多电平换流器 预测控制 功率追踪 控制策略 

分 类 号：TM46[电气工程—电器]