| In recent years,with the rapid development of science and technology,low-earth orbit(LEO)satellites was taken more and more attention.Observations.In order to meet the increasingly complex demands of work,countries have become increasingly demanding on LEO satellites.Which led to the development of LEO satellite technology,such as facing more different operating modes,worse load level transitions,longer life requirements and other challenges.These issues are all meant LEO satellites need a strong heart----an efficient power supply system.At present,the star power supply system generally uses Direct Energy Transfer(DET)in China.This control of the charging efficiency is low,with 20% of energy consumption,and the battery life will be confined.This paper proposed a Maximum Power Point Tracking can keep the solar array output at the maximum power point to achieve maximum power output and maximum power for charging purposes,thus ensuring a high efficiency,while avoiding the loss of energy and loss of battery life.Currently,foreign satellite MPPT technology has matured,while the domestic is still in its infancy.In this paper,the domestic power system satellite technology as the basis,foreign MPPT control technology as a reference,proposed a new type of power system MPPT control technology,and to do the analysis and study of all aspects.Firstly,proposed and compared with each MPPT power system topology frame,choose high efficiency and low cost of the new series and parallel structures.Then,proposed MPPT for each work state control method,designed specifically control circuit,and designed for reliability.Then,compare conventional MPPT algorithm,and put forward more reasonable perturbation method interleaving algorithm as the core of this article.Then,feasibility simulation and test verification scheme Grass Stage.Test Conclusion: The new MPPT power system designed in this paper is a high efficiency,high precision,fast response,stable and viable power system. |
PDF Full Text Request