Multi-phase rectification/inversion topology and single-phase control method, system and device thereof

Abstract

The invention discloses a multi-phase rectification / inversion topology and a single-phase control method, system and device thereof, and the method comprises the steps: obtaining an AC side voltage and an AC side current corresponding to a target in the multi-phase rectification / inversion topology; solving two voltage orthogonal signals corresponding to the alternating current side voltage and two current orthogonal signals corresponding to the alternating current side current by using an orthogonal signal generator; performing PLL operation on the two voltage orthogonal signals to obtain phase information of the alternating current side voltage; constructing a reference current based on the phase information, and carrying out operation on the reference current and two current orthogonal signals through a PI control loop to obtain an alpha-axis current regulating variable; and adding the alpha-axis current adjusting quantity and the alpha-axis voltage orthogonal signal, multiplying by a preset coefficient threshold value to obtain a modulation parameter, and adjusting a driving signal used for controlling a power switch device corresponding to the target based on the modulation parameter. Therefore, independent control of each phase of the multi-phase rectification / inversion topology can be realized, and development and application of the multi-phase rectification / inversion topology are facilitated.

Description

technical field [0001] The invention relates to the field of current conversion, in particular to a multi-phase rectification / inversion topology and a single-phase control method, system and device thereof. Background technique [0002] At present, for the three-phase rectification / inversion topology, the control logic usually adopted is as follows: taking the abc three-phase AC side voltage and abc three-phase AC side current of the three-phase rectification / inversion topology as a whole space vector, through the Clark coordinate transformation ( abc coordinate system to αβ coordinate system) and Park coordinate transformation (αβ coordinate system to dq coordinate system), to obtain dq two-phase voltage and dq two-phase current, and then dq two-phase voltage and dq two-phase current through PI (proportional integral, proportional integral) control loop adjustment, and then adjust the PI control loop through iPark coordinate transformation (dq coordinate system transformati...

AI Technical Summary

Problems solved by technology

[0003] However, in the whole control process, the three-phase AC side components are considered as a space vector as a whole, that is, the lack of any one-phase AC side component or the failure of any one-phase AC side component cannot complete the control successfully, resulting in when the system fails The system cannot work normally when there is no phase, no phase and three-way access to single-phase

At present, it is usually only possible to identify several situations that cause the system to fail to work normally, and give timely alarms and control system shutdown, which cannot improve the situation that the system does not work normally

Images