Electro-thermal loss analysis of the 3L-ANPC converter

Author

Long Cheng ; Quan Chen ; Guoli Li ; Cungang Hu ; Changbao Zheng ; Guanghui Fang

Author_Institution

Sch. of Electr. Eng. & Autom., Anhui Univ., Hefei, China

fYear

2014

fDate

24-27 June 2014

Firstpage

1

Lastpage

5

Abstract

The three-level active-neutral-point-clamped (3L-ANPC) voltage source converter (VSC) is used to overcome the uneven loss distribution. In 3L-ANPC VSC the dissipation in the power device is typically characterized by Sinusoidal Pulse Width Modulation (SPWM). The junction temperature and the load current of an actual power converter system are detected to calculate the power loss. This paper, firstly, calculates the total power losses under different power factor angle and modulation depth. Secondly, the thermal resistance and the thermal capacitance of various elements from datasheet are used to express the thermal network. The thermal network is used to estimate each power device junction temperature, and to analyze transient thermal distribution. The results of calculation are compared with that of junction temperature measurements with an infrared camera. Experimental results validate the improvement of the unequal distribution using 3L-ANPC.

Keywords

PWM power convertors; 3L-ANPC converter; SPWM; VSC; electrothermal loss analysis; infrared camera; junction temperature measurements; load current; modulation depth; power converter system; power device junction temperature; power factor angle; power loss; sinusoidal pulse width modulation; thermal capacitance; thermal network; thermal resistance; three-level active-neutral-point-clamped converter; transient thermal distribution; voltage source converter; Insulated gate bipolar transistors; Junctions; Modulation; Reactive power; Switches; Temperature; Thermal resistance; 3L-ANPC; power loss; thermal capacitance; thermal network; thermal resistance;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics for Distributed Generation Systems (PEDG), 2014 IEEE 5th International Symposium on

Conference_Location

Galway

Type

conf

DOI

10.1109/PEDG.2014.6878705

Filename

6878705