Solar cell array maximum power tracking hardware circuit

Abstract

A solar cell array maximum power tracking hardware circuit comprises a differential module, a voltage division module, a switch energy storage module, a voltage comparison module, a setting and resetting module, a logic selection module and a filter module. The differential module is electrically connected with solar array output voltage VSA and solar array output current ISA, the voltage division module is electrically connected with the differential module, the switch energy storage module is electrically connected with the voltage division module, the voltage comparison module is electrically connected with the switch energy storage module, and the filter module is electrically connected with the setting and resetting module and the logic selection module. On the basis of inherent characteristics of a solar array output characteristic curve, voltage and current are disturbed alternately, maximum power tracking can be realized simply, quickly and efficiently; an algorithm has no direct relation with power, multiply-divide operation is not needed, and the hardware circuit is easy to realized; disturbance is continuous, and the hardware circuit has better reliability, so that anti-radiation characteristics of MPPT algorithm control signals are improved; the hardware circuit has autonomy and high accuracy, can quickly and accurately track maximum power point and adapts to space application needs.

Description

technical field [0001] The invention relates to the technical field of aerospace power supply control, in particular to a solar cell array maximum power tracking hardware circuit. Background technique [0002] Power transmission technology is an important part of space power system technology. Power transmission methods include direct energy (DET) transmission and maximum power tracking (MPPT) transmission. The MPPT method can maximize the use of the output power of the solar array. The MPPT algorithm is an important part of the MPPT method. [0003] The traditional MPPT algorithm generally adopts such as figure 1 perturbation method as shown, or using a method such as figure 2 Incremental conductance method shown by figure 1 and figure 2 It can be seen that the traditional MPPT algorithm needs to collect the output voltage and current of the solar array, and after calculating the output power, perform a series of logical judgments to generate the MPPT control signal...

AI Technical Summary

Problems solved by technology

[0003] The traditional MPPT algorithm generally adopts such as figure 1 perturbation method as shown, or using a method such as figure 2 Incremental conductance method shown by figure 1 and figure 2 It can be seen that the traditional MPPT algorithm needs to collect the output voltage and current of the solar array, and after calculating the output power, perform a series of logical judgments to generate the MPPT control signal. The traditional MPPT algorithm needs a multiplier and divider, which is suitable for software implementation and cannot adapt to space radiation. The application requirements in the environment, and the traditional MPPT algorithm has a △V step disturbance, which cannot meet the application requirements of high reliability in space

[0004] Due to its poor radiation resistance and reliability, the traditional MPPT algorithm cannot meet the needs of space applications

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