基于准比例谐振控制的模块化多电平矩阵变换器环流抑制策略

doi:10.16183/j.cnki.jsjtu.2023.193

上海交通大学学报 ›› 2025, Vol. 59 ›› Issue (2): 242-251.doi: 10.16183/j.cnki.jsjtu.2023.193

• 新型电力系统与综合能源 • 上一篇下一篇

基于准比例谐振控制的模块化多电平矩阵变换器环流抑制策略

姜亚峰¹, 李仪博¹, 吴秋伟²^,³(), 刘沈全⁴, 吴小丹⁵, 周前⁶

1.山东大学电气工程学院,济南 250061
2.清华大学清华伯克利深圳学院, 广东深圳 518055
3.清华大学清华深圳国际研究生院,广东深圳 518055
4.华南理工大学电力学院,广州 510641
5.南京南瑞继保电气有限公司, 南京 211102
6.国网江苏省电力有限公司电力科学研究院,南京 211103

收稿日期:2023-05-12 修回日期:2023-06-29 接受日期:2023-08-09 出版日期:2025-02-28 发布日期:2025-03-11
通讯作者: 吴秋伟,教授,博士生导师;E-mail:qiuwu@sz.tsing.edu.cn.
作者简介:姜亚峰(1999—),硕士生,从事柔性低频输电研究.
基金资助:
国家电网公司总部科技项目(4000-202218073A-1-1-ZN)

Circulating Current Suppression Strategy of Modular Multilevel Matrix Converter Based on Quasi-Proportional Resonant Control

JIANG Yafeng¹, LI Yibo¹, WU Qiuwei²^,³(), LIU Shenquan⁴, WU Xiaodan⁵, ZHOU Qian⁶

1. School of Electrical Engineering, Shandong University, Jinan 250061, China
2. Tsinghua Berkeley Shenzhen Institute, Tsinghua University, Shenzhen 518055, Guangdong, China
3. Tsinghua Shenzhen International Graduate Institute, Tsinghua University, Shenzhen 518055, Guangdong, China
4. School of Electrical Engineering, South China University of Technology, Guangzhou 510641, China
5. NR Electric Co., Ltd., Nanjing 211102, China
6. State Grid Jiangsu Electric Power Co., Ltd. Research Institute, Nanjing 211103, China

Received:2023-05-12 Revised:2023-06-29 Accepted:2023-08-09 Online:2025-02-28 Published:2025-03-11

摘要/Abstract

摘要：

模块化多电平矩阵变换器(M³C)是分频输电系统中的核心装置.由于缺乏直流环节,所以不同频率的电气量在M³C内部直接耦合,导致M³C内部出现非常复杂的谐波,造成子模块均压困难,影响M³C的稳定运行.提出一种基于准比例谐振(PR)控制器的闭环控制策略,实现对M³C内部环流的抑制.首先,研究稳态时子模块电容纹波电压,详细分析子模块纹波电压与开关函数耦合产生谐波电流的机理,推导谐波环流的解析式,指出抑制环流的必要性.然后,针对4种频率成分的谐波环流设计并联的准PR环流抑制器,在抑制环流的同时减少桥臂电流的畸变,保障桥臂间电容电压均衡并且具备良好的动态性能.最后,在MATLAB/Simulink中搭建仿真模型,通过仿真验证控制策略的有效性.

关键词: 模块化多电平矩阵变换器, 分频输电系统, 电容纹波电压, 准比例谐振控制, 环流抑制

Abstract:

Modular multilevel matrix converter (M³C) is the core device of the fractional frequency transmission system. Due to the lack of direct current link, the electrical quantities of different frequencies are directly coupled inside the M³C, resulting in a complex harmonic condition, which makes it difficult to balance the capacitor voltage of the sub-module and affects the stable operation of the M³C. In this paper, a closed-loop control strategy based on quasi-proportional resonance (PR) controller is proposed to suppress the internal circulation of the M³C. First, the ripple voltage of the sub-module capacitor in steady state is studied. The mechanism of harmonic current generated by the coupling of sub-module ripple voltage and switching function is analyzed in detail. The analytical formula of harmonic circulating current is derived, and the necessity of suppressing the circulating current is pointed out. Then, a parallel quasi-PR circulation suppressor is designed for the harmonic circulation of four frequency components, which reduces the distortion of the bridge arm current while suppressing the circulating current, ensures the capacitor voltage balance between the bridge arms with a good dynamic performance. Finally, a simulation model is built in MATLAB / Simulink and the effectiveness of the control strategy is validated by simulation.

Key words: modular multilevel matrix converter (M³C), fractional frequency transmission system, capacitors ripple voltage, quasi-proportional resonance (PR) control, circulating current suppression

中图分类号:

TM461
TM464

姜亚峰, 李仪博, 吴秋伟, 刘沈全, 吴小丹, 周前. 基于准比例谐振控制的模块化多电平矩阵变换器环流抑制策略[J]. 上海交通大学学报, 2025, 59(2): 242-251.

JIANG Yafeng, LI Yibo, WU Qiuwei, LIU Shenquan, WU Xiaodan, ZHOU Qian. Circulating Current Suppression Strategy of Modular Multilevel Matrix Converter Based on Quasi-Proportional Resonant Control[J]. Journal of Shanghai Jiao Tong University, 2025, 59(2): 242-251.

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xy	θ₁	θ₂
au, bw, cv	2φ_s-α_l	α_s+φ_s-φ_l
av, bu, cw	2φ_s-α_l+2π/3	α_s+φ_s-φ_l+2π/3
aw, bv, cu	2φ_s-α_l-2π/3	α_s+φ_s-φ_l-2π/3

环流频率	电容纹波电压中耦合频率成分
2ω_s-ω_l	3ω_s-ω_l、ω_s-ω_l、2ω_s、2ω_s-2ω_l
2ω_s+ω_l	3ω_s+ω_l、ω_s+ω_l、2ω_s、2ω_s+2ω_l
ω_s-2ω_l	2ω_s-2ω_l、ω_s-ω_l、ω_s-3ω_l、2ω_l
ω_s+2ω_l	2ω_s+2ω_l、2ω_l、ω_s+ω_l、ω_s+3ω_l

参数	数值
M³C额定容量/MW	11
C/mF	12
额定电容电压/V	800
桥臂模块数/个	29
桥臂电感/mH	30
工频侧频率/Hz	50
分频侧频率/Hz	20
工频侧额定线电压/kV	12
分频侧额定线电压/kV	12

基于准比例谐振控制的模块化多电平矩阵变换器环流抑制策略

Circulating Current Suppression Strategy of Modular Multilevel Matrix Converter Based on Quasi-Proportional Resonant Control

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