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Large-signal stability analysis of solar array power system

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4 Author(s)
Hyunsu Bae ; Sch. of Electr. Eng. & Comput. Sci., Seoul Nat. Univ., Seoul ; Jaeho Lee ; Sanghyun Park ; Bo Hyung Cho

A large-signal stability analysis of the solar array regulator system is performed to facilitate the design and analysis of a low-earth-orbit (LEO) satellite power system. The effective load characteristics of various control methods in the solar array regulator system, such as the constant power load, variable power load, constant voltage load, constant current load, and constant resistive load, are classified to analyze the large-signal stability. Then, using the state plane analysis technique, the large-signal behavior of the solar array system is portrayed and the stability of various equilibrium points is analyzed. Thus, this approach can be contributed to organize the optimal controller structure of the system by representing the relationship between the control method of the solar array regulator and the large-signal stability. For the verification of the proposed large-signal analysis, a solar array regulator system that consists of two 100 W parallel module buck converters has been built and tested using a real 200 W solar array.

Published in:

Aerospace and Electronic Systems, IEEE Transactions on  (Volume:44 ,  Issue: 2 )

Date of Publication:

April 2008

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