Title :
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
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;
Conference_Titel :
Industrial Electronics (ISIE), 2012 IEEE International Symposium on
Conference_Location :
Hangzhou
Print_ISBN :
978-1-4673-0159-6
Electronic_ISBN :
2163-5137
DOI :
10.1109/ISIE.2012.6237404
