Phase shift control method, system and device of multi-converter system and storage medium

Abstract

The embodiment of the invention provides a phase shift control method, system and device of a multi-converter system and a storage medium. The multi-converter system comprises m converter groups, eachconverter group comprises a master control unit and n-1 slave control units, wherein the master control unit and the slave control units perform phase shift conversion according to set phase shift angles respectively, and m and n are integers larger than 1 respectively. The phase shift control method comprises the steps that: when any converter set breaks down, fault information is sent to otherconverter sets, and the converter set automatically quits operation; and when any non-faulty converter set receives the fault information and the number of faulty converter sets is smaller than a preset value, the phase shift angles of the master control unit and the slave control units are adjusted according to a preset function. According to the embodiment of the invention, the calculation amount of phase shift angle adjustment is simplified while the requirement on mutual communication between converter sets is reduced.

Description

technical field [0001] Embodiments of the present invention relate to the field of converters, and more specifically, relate to a phase-shift control method, system, device and storage medium for a multiple converter system. Background technique [0002] With the development of semiconductor and control technology, power electronic rectifiers are widely used in high-power occasions, such as heavy industrial occasions such as rail transit and electrolytic plating. In these high-power applications, due to the problem of loss, the switching frequency is relatively low, and at the same time, there are requirements for harmonics on the AC side. [0003] In order to meet the harmonic requirements on the AC side in high-power applications, a multiple converter system with phase-shift modulation is usually used to eliminate specific harmonics and reduce system pollution to the grid. The current multiple variable flow phase shifting scheme mainly includes the following three types: ...

AI Technical Summary

Problems solved by technology

[0007] The embodiments of the present invention aim at the above-mentioned multi-converter phase-shift scheme, without considering the dynamic adjustment of the phase-shift angles of other non-faulty converters when a faulty converter occurs, the off-line design of the phase-shift table is relatively complicated, and high-speed communication means are used to update in real time The phase shift angle leads to the problem of increased cost and large operating data, providing a phase shift control method, system, device and storage medium for a multiple converter system

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