Stability analysis of the shunt regulator in PCU with describing function method

Author

Shiheng Wang ; Xiaojie You ; Hong Li ; Ruixiang Hao ; Zheng, Trillion Q.

Author_Institution

Sch. of Electr. Eng., Beijing Jiaotong Univ., Beijing, China

fYear

2013

fDate

15-19 Sept. 2013

Firstpage

5385

Lastpage

5389

Abstract

The shunt regulator (SR) is a key part of the power conditioning unit, which is a kind of power supply system for spacecrafts. SR is a strong nonlinear system due to the hysteresis control adopted, but the stability analysis for SR is still ground on the approximate linearization. In this paper, a novel stability analysis method for strong nonlinear systems is proposed based on describing function, which is used to model the nonlinear link of SR. Further, two different conclusions about the stability of SR are drawn, obtained by the approximate linearization method and the describing function (DF) method, respectively. Finally, the simulation and experimental results prove the correctness of the stability analysis method proposed in this paper and discover the limitation of the linearization method for analyzing the stabilities of the nonlinear systems.

Keywords

approximation theory; describing functions; nonlinear systems; power system stability; space vehicle power plants; PCU; approximate linearization; describing function method; hysteresis control; power conditioning unit; shunt regulator; spacecrafts; stability analysis; strong nonlinear systems; Analytical models; Hysteresis; Nonlinear systems; Pulse width modulation; Regulators; Stability analysis; Switches;

fLanguage

English

Publisher

ieee

Conference_Titel

Energy Conversion Congress and Exposition (ECCE), 2013 IEEE

Conference_Location

Denver, CO

Type

conf

DOI

10.1109/ECCE.2013.6647431

Filename

6647431