The analog polarity observation method based on S3MPR designed for space power sysetem

Abstract

The photovoltaic panels in most high-power satellite power supply platforms work in the DET (direct energy transmission) mode, thus the power generation is not the most efficient. This causes the problems of large area of solar panels, complex unfolded mechanism and low reliability. Through the application of MPPT (Maximum power point tracking) technology, the efficiency of photovoltaic power generation can be optimized and the design and manufacturing cost can be reduced. In this design, the new type of S3MPR (Sequential switching shunt maximum power regulator) power topology is proposed. It is based on the S3R (sequential switching shunt regulator) topology and has the ability of multi-channel parallel connection. The polarity observation method, the control algorithm realized by analog circuit, widens the application range and has simple control principle and high tracking accuracy. A simulation platform is built in Saber to verify the feasibility of the algorithm. The final physical verification shows the tracking accuracy reaches 99%.