A Simple Operation Approach for Modular Multilevel Converter Under Grid Voltage Swell in Medium-Voltage Microgrids

A Simple Operation Approach for Modular Multilevel Converter Under Grid Voltage Swell in Medium-Voltage Microgrids

Modular multilevel converter (MMC) is drawing more and more attention in medium-voltage microgrid applications. Large-scale switching-off loads and grid faults may lead to the voltage swell in microgrid, where MMC should have the ride-through ability. In this paper, a simple operation approach with...

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Main Authors: Qian Xiao, Yu Jin, Linglin Chen, Xiaodan Yu, Hongjie Jia, Huiqiao Liu, Remus Teodorescu, Frede Blaabjerg
Format: Article
Language:English
Published: IEEE 2019-01-01
Series:IEEE Access
Subjects:
Modular multilevel converter (MMC)
microgrid
grid fault
grid voltage swell
fault-tolerant operation
zero-sequence voltage injection
Online Access:https://ieeexplore.ieee.org/document/8861334/
id doaj-bc88aa38a0b04939bd1e9ffde776b434
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spelling doaj-bc88aa38a0b04939bd1e9ffde776b4342021-03-29T23:56:26ZengIEEEIEEE Access2169-35362019-01-01714728014729110.1109/ACCESS.2019.29460878861334A Simple Operation Approach for Modular Multilevel Converter Under Grid Voltage Swell in Medium-Voltage MicrogridsQian Xiao0https://orcid.org/0000-0002-4986-4438Yu Jin1https://orcid.org/0000-0003-3861-5089Linglin Chen2Xiaodan Yu3Hongjie Jia4Huiqiao Liu5Remus Teodorescu6Frede Blaabjerg7https://orcid.org/0000-0001-8311-7412Key Laboratory of Smart Grid of Ministry of Education, Tianjin University, Tianjin, ChinaDepartment of Electrical Engineering and Automation, Harbin Institute of Technology, Harbin, ChinaDepartment of Electrical and Electronics Engineering, University of Nottingham, Nottingham, U.K.Key Laboratory of Smart Grid of Ministry of Education, Tianjin University, Tianjin, ChinaKey Laboratory of Smart Grid of Ministry of Education, Tianjin University, Tianjin, ChinaDepartment of Automation Engineering, Zhonghuan Information College, Tianjin University of Technology, Tianjin, ChinaDepartment of Energy Technology, Aalborg University, Aalborg, DenmarkDepartment of Energy Technology, Aalborg University, Aalborg, DenmarkModular multilevel converter (MMC) is drawing more and more attention in medium-voltage microgrid applications. Large-scale switching-off loads and grid faults may lead to the voltage swell in microgrid, where MMC should have the ride-through ability. In this paper, a simple operation approach with the fundamental and irregular zero-sequence voltage (ZSV) injection is proposed for MMC under grid voltage swell condition. First, the fundamental ZSV injection is applied to adjust the modulation margin of three phases where the amplitude values of modulation waves in each phase can be the same. Then, if the amplitudes with fundamental ZSV injection are still in over-modulation status, the new irregular ZSV injection is added to further enlarge the operation region. In addition, the limitation of the irregular ZSV injection is analyzed. Simulation and experimental results of MMC under different grid voltage swell conditions verify the effectiveness of the proposed operation approach.https://ieeexplore.ieee.org/document/8861334/Modular multilevel converter (MMC)microgridgrid faultgrid voltage swellfault-tolerant operationzero-sequence voltage injection
collection DOAJ
language English
format Article
sources DOAJ
author Qian Xiao
Yu Jin
Linglin Chen
Xiaodan Yu
Hongjie Jia
Huiqiao Liu
Remus Teodorescu
Frede Blaabjerg
spellingShingle Qian Xiao
Yu Jin
Linglin Chen
Xiaodan Yu
Hongjie Jia
Huiqiao Liu
Remus Teodorescu
Frede Blaabjerg
A Simple Operation Approach for Modular Multilevel Converter Under Grid Voltage Swell in Medium-Voltage Microgrids
IEEE Access
Modular multilevel converter (MMC)
microgrid
grid fault
grid voltage swell
fault-tolerant operation
zero-sequence voltage injection
author_facet Qian Xiao
Yu Jin
Linglin Chen
Xiaodan Yu
Hongjie Jia
Huiqiao Liu
Remus Teodorescu
Frede Blaabjerg
author_sort Qian Xiao
title A Simple Operation Approach for Modular Multilevel Converter Under Grid Voltage Swell in Medium-Voltage Microgrids
title_short A Simple Operation Approach for Modular Multilevel Converter Under Grid Voltage Swell in Medium-Voltage Microgrids
title_full A Simple Operation Approach for Modular Multilevel Converter Under Grid Voltage Swell in Medium-Voltage Microgrids
title_fullStr A Simple Operation Approach for Modular Multilevel Converter Under Grid Voltage Swell in Medium-Voltage Microgrids
title_full_unstemmed A Simple Operation Approach for Modular Multilevel Converter Under Grid Voltage Swell in Medium-Voltage Microgrids
title_sort simple operation approach for modular multilevel converter under grid voltage swell in medium-voltage microgrids
publisher IEEE
series IEEE Access
issn 2169-3536
publishDate 2019-01-01
description Modular multilevel converter (MMC) is drawing more and more attention in medium-voltage microgrid applications. Large-scale switching-off loads and grid faults may lead to the voltage swell in microgrid, where MMC should have the ride-through ability. In this paper, a simple operation approach with the fundamental and irregular zero-sequence voltage (ZSV) injection is proposed for MMC under grid voltage swell condition. First, the fundamental ZSV injection is applied to adjust the modulation margin of three phases where the amplitude values of modulation waves in each phase can be the same. Then, if the amplitudes with fundamental ZSV injection are still in over-modulation status, the new irregular ZSV injection is added to further enlarge the operation region. In addition, the limitation of the irregular ZSV injection is analyzed. Simulation and experimental results of MMC under different grid voltage swell conditions verify the effectiveness of the proposed operation approach.
topic Modular multilevel converter (MMC)
microgrid
grid fault
grid voltage swell
fault-tolerant operation
zero-sequence voltage injection
url https://ieeexplore.ieee.org/document/8861334/
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