Generalized Single-Phase Harmonic State Space Modeling of the Modular Multilevel Converter With Zero-Sequence Voltage Compensation

作     者：Xu, Zigao Li, Binbin Wang, Shengbo Zhang, Shiguang Xu, Dianguo 

作者机构：Harbin Inst Technol Sch Elect Engn & Automat Harbin 150001 Heilongjiang Peoples R China 

出 版 物：《IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS》 (IEEE工业电子学汇刊)

年 卷 期：2019年第66卷第8期

页      面：6416-6426页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 0804[工学-仪器科学与技术] 0811[工学-控制科学与工程] 

基　　金：National Natural Science Foundation of China [51720105008, 51807033] Young Elite Scientists Sponsorship Program by CAST Power Electronics Science and Education Development Program of Delta Group 

主　　题：Closed-loop control harmonic state space (HSS) linearized model modular multilevel converters (MMC) single-phase model zero-sequence voltage 

摘      要：The modular multilevel converter (MMC) has attracted extensive research in recent years. An appropriate model is necessary to analyze stability or to design MMC controllers. Several published MMC models have been derived in single-phase form to simplify the modeling mathematics. However, little attention is given to the zero-sequence voltage, which introduces coupling in the single-phase model and leads to significant error. In this paper, after revealing the mechanism behind the zero-sequence voltage, a more accurate generalized single-phase MMC model is proposed, which eliminates the zero-sequence voltage coupling effect and is linearized based on harmonic state space (HSS) theory to precisely characterize the internal harmonic features of MMC. A systematic HSS modeling process is presented for both open-loop and closed-loop conditions. And the proposed model is generalized as it can incorporate different control strategy by controller transfer function substitution. Hence it is valuable to analyze MMC stability and dynamics. Model effectiveness is verified by simulation results.