Stability analysis of cascade AC system based on three-phase voltage source PWM rectifier

Author

Hui Yu ; Xinbo Ruan ; Xuehua Wang ; Hanzhi Zhang ; Yu Teng

Author_Institution

State Key Lab. of Adv. Electromagn. Eng. & Technol., Huazhong Univ. of Sci. & Technol., Wuhan, China

fYear

2014

fDate

5-8 Nov. 2014

Firstpage

847

Lastpage

852

Abstract

In cascade AC systems, the impedance interaction between the source module and the load module may cause overall system instability. The generalized Nyquist stability criterion can be applied to characterize the stability of cascade three-phase AC systems. But it is usually very complicated and cannot directly reveal effective control strategy to alleviate the interaction problem. Based on three-phase voltage source PWM rectifier, this paper proposes a simplified stability criterion for three-phase AC systems. An input impedance regulator design method is introduced to alleviate the interaction problem. Finally, a 20kW prototype is built and tested. The experimental results confirm the proposed stability criterion and the input impedance regulator design method.

Keywords

Nyquist stability; PWM rectifiers; generalized Nyquist stability criterion; impedance interaction; input impedance regulator design; load module; overall system instability; power 20 kW; source module; stability analysis; three-phase cascade AC system; three-phase voltage source PWM rectifier; Impedance; Power system stability; Pulse width modulation; Rectifiers; Regulators; Stability criteria; cascade AC system; impedance regulator; stability;

fLanguage

English

Publisher

ieee

Conference_Titel

Electronics and Application Conference and Exposition (PEAC), 2014 International

Conference_Location

Shanghai

Type

conf

DOI

10.1109/PEAC.2014.7037969

Filename

7037969