[1]王明东,周威,李晓蕾,等.模块化多电平矩阵换流器准比例谐振控制研究[J].郑州大学学报(工学版),2021,42(05):86-91.[doi:10.13705/j.issn.1671-6833.2021.05.007] 　Wang Mingdong,Zhou Wei,Li Xiaolei,et al.Research on Quasi-Proportional Resonant Control of Modular Multilevel Matrix Converter[J].Journal of Zhengzhou University (Engineering Science),2021,42(05):86-91.[doi:10.13705/j.issn.1671-6833.2021.05.007] 点击复制 模块化多电平矩阵换流器准比例谐振控制研究() 分享到： var jiathis_config = { data_track_clickback: true };

42卷

2021年05期

86-91

2021-09-10

文章信息/Info

Title:
Research on Quasi-Proportional Resonant Control of Modular Multilevel Matrix Converter

Author(s):
Wang Mingdong; Zhou Wei; Li Xiaolei; Li Zhongwen; Wang Zixi;
School of Electrical Engineering, Zhengzhou University; State Grid Henan Electric Power Company; School of Electric Power University, North China University of Hydropower and Hydropower;

Keywords:
DOI:
10.13705/j.issn.1671-6833.2021.05.007

A

Abstract:
As a new AC/AC conversion device, modular multilevel matrix converter (MMMC) has advantages in low frequency and large capacity applications such as fractional frequency transmission system, whereas its bridge arm current control is complicated. In this paper, the topological structure of MMMC is analyzed and the mathematical model is established to study the structure of bridge arm current. In order to solve the problem of poor control precision of bridge arm current by traditional direct control method, quasi-proportional re-sonant (QPR) control strategy is introduced, and a quasi-proportional resonant controller based on input and output frequencies is designed according to the characteristics of fractional frequency transmission system. According to the control requirements of the system active and reactive power, the outer loop control strategy of constant active power control and constant reactive power control is given. At the same time, the relationship between the capacitive voltage of the sub-module and active power is deduced, and the voltage balance strategy of the submodule based on active power of the system is proposed by applying double Clarke transform. Finally, the MMMC-FFTS system simulation model is built on the simulation platform, the steady-state and transient response of the system are simulated respectively, and the simulation results of direct control and QPR control methods are compared. The simulation results show that the improved control method has good steady-state and transient performance, and the accuracy of reference tracking is higher, which verifies the feasibility and superiority of the proposed method.

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