SPWM逆变电源的自动主从并联控制技术

Parallel operation of SPWM inverters based on auto-master-slave technique

本文提出了一种可用于分布式发电系统或大容量UPS系统的逆变电源并联控制技术———自动主从并联控制技术。这种控制技术以并联的逆变电源输出功率的特性为基础,并采用自动主从控制策略来实现逆变电源的同步并联运行。实验装置以DSP为核心,并以带电容电流反馈的高性能SPWM逆变电源为基础,采用自动主从并联控制技术实现了逆变电源的并联运行。实验结果表明,逆变电源之间的均流效果很好。

This paper presents a new control scheme: Auto\|Master\|Slave parallel operation technique of inverters. This control scheme can be used in large scale UPS systems and distributed power systems. With this control scheme the paralleled inverters can share linear or nonlinear load current. Based on DSP and high performance inverter modules which have inner filter capacitor current loops, an experiment system is built to verify this control scheme, and the results indicate that the inverters in parallel connection realize load current sharing. 