Active-disturbance-rejection space high-power rectification system

Abstract

The invention discloses an active-disturbance-rejection space high-power rectification system, which comprises a tracking differentiator which inputs a given voltage signal at the input end and carries out the differential processing of the given voltage signal to obtain a first voltage signal and a second voltage signal; a fuzzy neural network PID controller which is used for performing control law operation on the received first voltage error signal and the received second voltage error signal to obtain a first alternating current voltage signal; a disturbance compensation module which is used for performing disturbance compensation processing on the received first alternating-current voltage signal to obtain a second alternating-current voltage signal after active disturbance rejection; a rectification main power module which is used for converting the second alternating current input signal into direct current to obtain a direct current signal; and an expansion observer which is used for carrying out state estimation processing on the received disturbance compensation error signal and the direct current signal, and outputting a first voltage state signal, a second voltage state signal and a compensation feedback signal. The active-disturbance-rejection space high-power rectification system improves the efficiency of a space nuclear power supply system.

Description

technical field [0001] The invention belongs to the field of AC and DC conversion in space nuclear power, and in particular relates to an active disturbance rejection high-power rectification system suitable for space nuclear power. Background technique [0002] With the gradual advancement of my country's aerospace industry into multiple fields, the depth of human exploration of space is also increasing, and the energy system of spacecraft has also shown a trend of diversification. Usually spacecraft use solar energy as the main energy source, but the efficiency of the battery will be reduced under conditions such as low solar radiation intensity, and the nuclear power system has shown corresponding advantages. Due to the particularity of the front-end nuclear energy system, which is different from the design of the traditional spacecraft power system, [0003] The frequency of the high-voltage DC bus also fluctuates to a certain extent, causing great damage to the power c...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a space high-power rectification system with self-disturbance immunity to solve the problems of the DC side output voltage fluctuation, the AC side current harmonic components, and the interference of the external temperature of the system to the system in the space nuclear power supply system.

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