[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]

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模块化多电平矩阵换流器准比例谐振控制研究()

分享到：

《郑州大学学报(工学版)》[ISSN:1671-6833/CN:41-1339/T]

卷:

42

期数:

2021年05期

页码:

86-91

栏目:

出版日期:

2021-09-10

文章信息/Info

Title:

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

作者:

王明东; 周威; 李晓蕾; 李忠文; 王子胥

郑州大学电气工程学院;国家电网河南省电力公司;华北水利水电大学电力学院;

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;

关键词:

分频输电; 模块化多电平矩阵换流器; 桥臂电流控制; 电容电压均衡; QPR控制器

Keywords:

fractional frequency transmission;  MMMC;  arm current control;  capacitor voltage balance;  QPR controller

DOI:

10.13705/j.issn.1671-6833.2021.05.007

文献标志码:

A

摘要:

分频输电是一种非常适合大规模远距离系统的输电技术，其核心为变频装置。模块化多电平矩阵换流器（MMMC）作为一种新型的交-交变换装置，在低频大容量场合很具优势。然而其内部结构和控制电气量复杂，桥臂电流的控制较为困难。本文首先对MMMC的内部结构进行分析并建立了数学模型，研究了桥臂电流、子模块电容电压和系统功率流动，给出了定有功功率控制和定无功功率控制的外环控制策略以及基于系统有功功率的子模块电压平衡策略。同时，根据分频输电系统的特性设计了基于输入输出频率的准比例谐振（QPR）控制器。最后，通过建立系统仿真模型，对直接控制和QPR两种控制方法的仿真结果进行了比较，验证了QPR控制方法的可行性与有效性。

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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