[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.
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模块化多电平矩阵换流器准比例谐振控制研究()
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《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
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:
Fractional frequency transmission is a kind of transmission technology suitable for large-scale long-distance system, whose core is frequency conversion device. Modular multilevel matrix converter (MMMC) is a new type of AC-AC converter, which has advantag es in low frequency and large capacity. Nevertheless, its internal structure and electrical control volume is complex, so it is difficult to control the arm current. In this paper, the internal structure of MMMC is analyzed and a mathematical model is esta blished. On this basis, the bridge arm current, the submodule capacitance voltage and the system power flow are studied, then the outer loop control strategy of the constant active power control and the constant reactive power control and the voltage balance strategy of the submodule ba<x>sed on the system active power are given. At the same time, a quasi-proportional resonance (QPR) controller ba<x>sed on input and output frequencies is designed according to the characteristics of the frequency division transmission system. Finally, the simulation results of direct control and QPR control methods are compared by establishing the MMMC system simulation model, which verifies the feasibility and effectiveness of the QPR control method
更新日期/Last Update: 2021-10-11