Tracking control method of peak power output point of solar cell array

Abstract

The invention provides a tracking control method of a peak power output point of a solar cell array, namely MPPT. The method comprises the steps that an MPPT program starts running so as to disturb the output voltage of a power bus of the solar cell array and reduce the output voltage of the solar cell array, whether the output power of the solar cell array is increased or not is observed, and ifthe output power is increased, voltage disturbance continues; if the output power is reduced, the output current of the power bus of the solar cell array is disturbed so as to reduce the output current of the solar cell array, whether the output power of the solar cell array is increased or not is observed, if the output power is increased, current disturbance continues, and otherwise, voltage disturbance is conducted till the output power approximates to the peak power point of the solar cell array. According to the tracking control method of the peak power output point of the solar cell array, MPPT control over the solar cell array is conducted by implanting a special MPPT control program module into aircraft energy lower-computer software, and the solar cell utilization rate can be remarkably improved without increasing the hardware cost.

Description

technical field [0001] The invention relates to the technical field of space vehicles, in particular to a tracking control method for a peak power output point of a solar battery array. Background technique [0002] According to the working characteristics of the solar cell, its peak power output point changes with the change of light conditions such as light intensity and incident angle. At present, the domestic space vehicle power supply system generally adopts the CVT (constant voltage) control method for the control of solar battery power generation, so that the actual operating point of the solar battery array cannot be switched to the peak power output point of the solar battery array as the sun's illumination conditions change. Work, so about 20% of the energy will be lost in the initial stage. [0003] If the energy system of the aircraft adopts the tracking control technology of the peak power output point of the solar cell array, the actual working point of the ...

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a tracking control method for the peak power output point of a solar battery array, so as to solve the problem that the actual operating point of the aircraft battery array can efficiently track its peak power point

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