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Low-frequency suppression strategy based on predictive control model for modular multilevel converters
Journal of Power Electronics ( IF 1.4 ) Pub Date : 2021-08-05 , DOI: 10.1007/s43236-021-00286-w
Lianqiang Wang 1 , Li Zhang 1 , Yongsheng Xiong 1 , Rui Ma 1
Affiliation  

Modular multilevel converters (MMCs) have attracted a great deal of research attention in medium-voltage motor drive applications. However, the excessive fundamental-frequency submodule (SM) capacitor voltage ripple at low speeds or during start-up poses a major technological challenge. This paper develops a new control strategy for SM capacitor voltage ripple suppression based on model predictive control (MPC). The system mathematical model with common-mode voltage (CMV) and the SM capacitor voltage ripple suppression models are established. Then, a cost function of the system is established, and the control system is designed. When compared to existing strategies, the modulation process, PI regulation process, and high frequency injection control are avoided due to the MPC strategy. The performance of the proposed approach is verified through MATLAB simulations and experiments on a MMC system.



中文翻译:

基于预测控制模型的模块化多电平换流器低频抑制策略

模块化多电平转换器 (MMC) 在中压电机驱动应用中引起了大量研究关注。然而,低速或启动期间过多的基频子模块 (SM) 电容器电压纹波带来了重大的技术挑战。本文开发了一种基于模型预测控制 (MPC) 的 SM 电容器电压纹波抑制新控制策略。建立了具有共模电压(CMV)的系统数学模型和SM电容电压纹波抑制模型。然后,建立系统的成本函数,设计控制系统。与现有策略相比,MPC 策略避免了调制过程、PI 调节过程和高频注入控制。

更新日期:2021-08-09
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