Multi-mode Flexible Switching Strategy of Multi-functional Grid-connected Converters for Active Support to Transient Voltage

被引：0

作者：

Guo Q. ^{[1
]}

Jia W. ^{[2
]}

Tu C. ^{[1
]}

Hou Y. ^{[1
]}

Huang Z. ^{[1
]}

Jiang F. ^{[3
]}

机构：

[1] National Electric Power Conversion and Control Engineering Technology Research Center, Hunan University, Changsha

[2] Jinzhong Power Supply Company, State Grid Shanxi Electric Power Company, Jinzhong

[3] School of Electrical and Information Engineering, Changsha University of Science & Technology, Changsha

来源：

Dianli Xitong Zidonghua/Automation of Electric Power Systems | 2023年 / 47卷 / 21期

基金：

中国国家自然科学基金;

关键词：

flexible switching; grid-connected converter; power quality control device; reactive power compensation; reliable power supply; voltage support;

D O I：

10.7500/AEPS20230226001

中图分类号：

学科分类号：

摘要：

The power quality control device based on grid-connected converters has superior performance in harmonic current control and reactive power compensation, and the reliability of the device is high. However, its ability to solve the problem of transient voltage fluctuations needs to be further improved. Based on this, this paper proposes a multi-functional grid-connected converter (MF-GCC) for voltage active support and its multi-mode flexible switching strategy. When the grid voltage is normal, MF-GCC works in the parallel compensation mode to realize the unit power factor operation on the grid side. When the power grid voltage fluctuates, MF-GCC works in series compensation mode to realize the voltage compensation function and maintain the voltage constant on the sensitive load side. In addition, the switching process of parallel and series compensation modes of MF-GCC is analyzed in detail, and the optimal switching sequence of active power devices is set up. The simulation and experimental results verify the effectiveness and feasibility of the proposed topology and control strategy. © 2023 Automation of Electric Power Systems Press. All rights reserved.

引用

页码：156 / 164

页数：8

共 23 条

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