An Adaptive Master-Slave Multi-Mode Parallel Current Sharing Control Method

Abstract

The invention relates to a self-adaptive master slave multimode type parallel operation current-sharing control method which comprises a main circuit and a control circuit which are electrically isolated from each other. The main circuit comprises N module circuits; N is a natural number; the control circuit comprises a core controller for performing driving logic control on each module circuit of the main circuit. The control method comprises the following steps: 1) selecting No. M module circuit from N module circuits of the main circuit as a main module by the core controller, wherein M=rand()%N+1, the rest module circuits are arranged as slave modules; 2) setting a working mode of a self-adaptive master slave multimode type parallel operation current-sharing control circuit according to the requirement of the user, wherein the working mode comprises a constant pressure mode, a constant current mode and a constant power mode; 3) under the selected working mode, monitoring and adjusting the system current, system voltage and system power of the main circuit to be less than a preset value by the core controller. According to the control method, the selection for the main module is relative uniform; the system control mode is variable; the flexibility is strong; the method is safe and reliable.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to an adaptive master-slave multi-mode parallel current sharing control method. Background technique [0002] Power paralleling technology is the core technology of high-power distributed power systems, and the key to realizing power paralleling technology is how to use current sharing technology efficiently and reliably. The so-called current sharing technology refers to the measure of evenly distributing the load current of each power module in a system in which multiple power modules are connected in parallel. The voltage is stable, and the current sharing accuracy and transient response are good. [0003] Patent No. "ZL201510357553.7" "An Autonomous Current Sharing Digital Control Based on CAN Bus Communication", the invention is a digital current sharing mechanism of master-slave competition mechanism in which N+1 parallel power modules publish their own information ...

AI Technical Summary

Problems solved by technology

[0004] The control method described in the above-mentioned invention is relatively simple, and only simply regulates the current of the current sharing system, so it has great limitations; in addition, the system selects the master station through the non-arbitration conflict mode of the CAN bus , the communication bus has a high probability of being interfered in high-power industrial control. If the communication system is damaged, it will directly affect the normal operation of the entire system; moreover, the method for selecting the master station in the above-mentioned invention is relatively simple, which may lead to That power module is often set as the master station, and the master station needs to bear a huge stress when it is fully loaded. If the same power module is used as the master station many times, it will cause damage to it, and in severe cases, it will affect the normal operation of the entire system

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