Analysis of over-voltage of dc-link capacitor of solid state power supply in parallel operation

Author

Shi-xiong Nie ; Zi-ling Nie ; Yan-hao Wu ; Jun-jie Zhu

Author_Institution

Nat. Key Lab. for Vessel Integrated Power Syst. Technol., Naval Univ. of Eng., Wuhan, China

fYear

2012

fDate

28-31 May 2012

Firstpage

2020

Lastpage

2025

Abstract

In the medium frequency voltage source paralleled inverters, the paralleled diodes in IGBTs run as rectifier before the inverter starts, and the DC capacitor could be damaged by over voltage because of the transient of the circuit. This paper analyzed the characteristics of medium-frequency inverter in parallel operation, compared to the 50 Hz inverter. The simplified system model is setup, and the impact of parallel inductor, the use age of DC voltage and filter capacitor on the safety of DC capacitor is analyzed theoretically. The Simulink model is established to verify the theoretical analysis. Finally, measures are proposed to protect DC capacitor.

Keywords

capacitors; inductors; insulated gate bipolar transistors; invertors; overvoltage; power supply quality; power system transients; solid-state rectifiers; DC link capacitor; IGBT; Simulink; circuit transient; filter capacitor; medium frequency inverter; overvoltage; parallel diode; parallel inductor; parallel invertor; rectifier; solid state power supply; Capacitors; Inverters; Load modeling; Mathematical model; Power supplies; Rectifiers; Wires; DC-Link capacitor safety; medium-frequency inverter; parallel reverse rectifier;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Electronics (ISIE), 2012 IEEE International Symposium on

Conference_Location

Hangzhou

ISSN

2163-5137

Print_ISBN

978-1-4673-0159-6

Electronic_ISBN

2163-5137

Type

conf

DOI

10.1109/ISIE.2012.6237404

Filename

6237404