Four-quadrant converter control method and device

Abstract

The embodiment of the invention provides a four-quadrant converter control method and device, and the method comprises the steps: determining at least one pair of orthogonal signals according to a grid-side voltage, a grid-side current and a preset all-pass filter; performing coordinate transformation on the pair of orthogonal signals according to a preset synchronous rotating coordinate system toobtain a corresponding direct-current signal; performing deviation correction processing according to the direct current signal to obtain a modulation voltage signal. According to the invention, thenon-increment quadrature signal can be accurately generated based on the all-pass filter, so that quick response and static-error-free tracking of a current loop are realized.

Description

technical field [0001] The present application relates to the field of electrical equipment, in particular to a method and device for controlling a four-quadrant converter. Background technique [0002] The four-quadrant converter is a key part of the train electrical system. At present, the research direction of the four-quadrant converter mainly focuses on the modulation algorithm of the control system, the design of the current regulator, the harmonic suppression of the grid-side current, and the fast dynamic response control of the DC-side voltage. Wait. [0003] The controllers in the prior art are superior in the static-free tracking performance of the power frequency AC signal, but the gain at the non-fundamental frequency is very small, so the performance of the controller is adversely affected when the grid frequency shifts. Contents of the invention [0004] Aiming at the problems in the prior art, this application provides a four-quadrant converter control meth...

AI Technical Summary

Problems solved by technology

[0003] The controllers in the prior art are superior in the static-free tracking performance of power frequency AC signals, but the gain

Images