Control method and system of backstepping controller based on VIENNA rectifier

Abstract

The invention discloses a control method of a backstepping controller based on a VIENNA rectifier. The control method comprises the following steps of acquiring the voltage and current parameters of the direct-current side, a direct-current side voltage expected value and a q-axis current expected control quantity of the VIENNA rectifier; performing dq conversion processing on the voltage and current parameters, and determining a d-axis current value, a q-axis current value, a d-axis voltage value and a q-axis voltage value; determining a d-axis current expected control amount according to thedirect-current side voltage expected value and the actual voltage value; according to the d-axis current expected control amount, the d-axis current value, the q-axis current value and the d-axis voltage value to determine the actual control amount of the d-axis voltage; according to the expected control amount of the q-axis current, the d-axis current value, the q-axis current value and the q-axis voltage value for determining the actual control quantity of the q-axis voltage; and generating SVPWM modulating signals according to the actual control quantity of the d-axis voltage, the actual control quantity of the q-axis voltage and the output angle theta of a phase-locked loop, and controlling the VIENNA rectifier. By adopting the control method, the stability of the d-q-axis current tracking and the direct-current side voltage can be realized.

Description

technical field [0001] The invention relates to the field of control of VIENNA rectifiers, in particular to a control method and system for a reverse push controller based on VIENNA rectifiers. Background technique [0002] In the simulation experiment of the VIENNA rectifier, the VIENNA rectifier is usually controlled by the DC voltage loop PI, but the adjustment speed of the voltage loop PI is generally relatively slow. When the load is suddenly added or unloaded, the output active power of the VIENNA rectifier will change suddenly. Causes over-discharge or over-charge of the capacitor on the DC output side, resulting in under-voltage or over-regulation of the DC output voltage. After being disturbed, the voltage will drop or rise greatly, which will cause a very large safety hazard to the device itself, and it will take a long time for the DC output voltage to return to the steady state. Contents of the invention [0003] The purpose of the present invention is to prov...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a control method and system based on a VIENNA rectifier reverse push controller to solve the problem that the traditional voltage loop PI controller cannot perform rapid correction according to the change of the output voltage. After being disturbed, the voltage will occur A large drop or rise will cause a very large safety hazard to the device itself, and it will take a long time for the DC output voltage to return to a steady state.

Images