Maximum power tracking circuit control system of solar cell array for spacecraft

Abstract

The invention discloses a maximum power tracking circuit control system of a solar cell array for a spacecraft. The system is characterized in that a current sampling circuit is electrically connectedwith a first sampling hold circuit, the first sampling hold circuit is electrically connected with a current comparison circuit, the first sampling hold circuit is electrically connected with a current comparison circuit through a resistance voltage-division circuit; a voltage sampling circuit is electrically connected with a second sampling hold circuit, the second sampling hold circuit is electrically connected with a voltage comparison circuit, the second sampling hold circuit is electrically connected with a voltage comparison circuit through a resistance voltage-division circuit; the current comparison circuit is electrically connected with an RS trigger circuit; the voltage comparison circuit is electrically connected with the RS trigger circuit; the RS trigger circuit is electrically connected with the first sampling hold circuit, and the RS trigger circuit is electrically connected with the second sampling hold circuit; and a Qn terminal of the RS trigger circuit is electrically connected with an integer circuit, and an output terminal of the integer circuit is the output terminal of the maximum power tracking circuit control system of the solar cell array for the spacecraft.

Description

technical field [0001] The invention belongs to the technical field of space power supply controllers, and in particular relates to a solar cell array maximum power tracking circuit control system for spacecraft. Background technique [0002] The power supply system of most spacecraft at home and abroad adopts the solar cell array-battery pack power supply system. Since the output characteristics of solar cells have strong nonlinear characteristics, their output power is related to conditions such as light intensity, ambient temperature, and particle irradiation. Under certain light intensity and temperature conditions, the solar cell can work at different output voltages, but only at a certain output voltage, its output power is maximum, which is called the maximum power point. The maximum power tracking technology is to adjust the working point of the solar cell array in real time through the control technology, so that the solar cell array works near the maximum power po...

AI Technical Summary

Problems solved by technology

However, this design divides the sampling voltage and sampling current of the solar cell array at the input of the sample holder, and there is a fixed voltage loss through the sample holder. The static impedance and dynamic impedance of the solar cell array have large deviations, and the tracking accuracy is low. It will cause the maximum power tracking of the solar cell to fail

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