DC/DC multi-module parallel current-sharing control method, module controller and storage medium

Abstract

The invention relates to a DC / DC multi-module parallel current-sharing control method, a module controller and a storage medium. The method comprises the steps: collecting a voltage and a current provided for a load by each parallel module in real time; calculating a current-sharing coefficient and virtual average power of each module during working; performing no-difference control to obtain a first voltage instruction value; according to the first voltage instruction value, a voltage given value and a load side voltage, carrying out no-difference control to obtain a first current instructionvalue; according to the first current instruction value and an input side inductive current, carrying out no-difference control to obtain a second current instruction value; according to the second current instruction value, obtaining a switch driving signal to carry out current-sharing control. According to the invention, the method achieves the parallel connection of modules with different rated powers, and load power is proportionally distributed to the modules according to the rated power ratio, thereby achieving the purpose of current-sharing among the modules. The method is simple, easyto implement and high in practicability.

Description

technical field [0001] The invention belongs to the technical field of converter grid-connected control, and in particular relates to a DC / DC multi-module parallel current sharing control method and a module controller for DC / DC multi-module parallel current sharing control. Background technique [0002] When DC / DC multi-modules are running in parallel, due to the inequalities of the circuit parameters of each module and the variability of load requirements, etc., the output current of each parallel device may be uneven, which will cause the output power of the device to be unbalanced. It causes serious electromagnetic interference to the equipment, which prevents it from exerting its maximum performance, reduces the energy utilization rate, and cannot guarantee the safe and stable operation of the equipment. [0003] CN109067176A discloses a DC-DC converter maximum inductance current sharing control method, including voltage outer loop control and current inner loop control...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a DC / DC multi-module parallel current sharing control method, a module controller and a computer program medium for DC / DC multi-module parallel current sharing control, which are used to solve the above-mentioned complicated control process, which is not easy to implement, The problem of poor usability

Images