DC-link voltage control method of a fault phase bridge arm transfer grounding arc suppression device - Details

author：

Guo, Moufa (Guo, Moufa.) ^[1] (Scholars：郭谋发) | Liu, Xinbin (Liu, Xinbin.) ^[2] | Zhang, Binlong (Zhang, Binlong.) ^[3] | Zhao, Guojun (Zhao, Guojun.) ^[4] | Zheng, Zeyin (Zheng, Zeyin.) ^[5] (Scholars：郑泽胤)

Indexed by：

EI Scopus

Abstract：

There　is　a　problem　in　that　the　non-fault　phase　bridge　arm　of　traditional　three-phase　direct-hanging　flexible　arc　suppression　device　bears　the　line　voltage.　Thus　a　fault　phase　bridge　arm　transfer　grounding　arc　suppression　method　is　proposed.　This　method　controls　the　fault　phase　bridge　arm　transfer　grounding　through　the　switch.　The　bus　voltage　is　shared　by　the　fault　phase　bridge　arm　and　the　non-fault　phase　bridge　arm,　and　the　three-phase　bridge　arm　outputs　the　current　to　achieve　arc　suppression.　The　cascaded　H-bridge　DC-link　needs　an　independent　power　supply,　so　a　distributed　voltage　balance　commutation　modulation　method　is　proposed.　The　modulation　method　selectively　changes　the　H-bridge　output　state　according　to　the　influence　of　H-bridge　output　state　and　current　direction　on　the　charge　and　discharge　of　the　DC-link　capacitor,　and　then　realizes　the　stability　of　DC-link　voltage.　The　arc　suppression　device　using　this　modulation　method　does　not　need　to　be　equipped　with　an　independent　power　supply　on　the　DC　side,　and　can　maintain　H-bridge　DC-link　voltage　stability　during　the　arc　suppression　process.　Finally,　the　proposed　method　is　verified　by　Matlab/Simulink　simulation　software,　and　the　results　prove　the　effectiveness　of　the　proposed　method.　©　2024　Power　System　Protection　and　Control　Press.　All　rights　reserved.

Keyword：

Electric grounding Electric power system protection HVDC power transmission MATLAB Solar power generation

Community：

[ 1 ] [Guo, Moufa]College of Electrical Engineering and Automation, Fuzhou University, Fuzhou; 350108, China
[ 2 ] [Guo, Moufa]Engineering Research Center of Smart Distribution Grid Equipment, Fujian Province University, Fuzhou; 350108, China
[ 3 ] [Liu, Xinbin]College of Electrical Engineering and Automation, Fuzhou University, Fuzhou; 350108, China
[ 4 ] [Zhang, Binlong]College of Electrical Engineering and Automation, Fuzhou University, Fuzhou; 350108, China
[ 5 ] [Zhang, Binlong]Engineering Research Center of Smart Distribution Grid Equipment, Fujian Province University, Fuzhou; 350108, China
[ 6 ] [Zhao, Guojun]College of Electrical Engineering and Automation, Fuzhou University, Fuzhou; 350108, China
[ 7 ] [Zheng, Zeyin]College of Electrical Engineering and Automation, Fuzhou University, Fuzhou; 350108, China
[ 8 ] [Zheng, Zeyin]Engineering Research Center of Smart Distribution Grid Equipment, Fujian Province University, Fuzhou; 350108, China