并联逆变电源的控制技术及短路保护的实验分析

Experimental Analysis of Control Technology and Short Circuit Protection of Parallel Inverters

在一些大容量、多设备的电力系统中,单台逆变电源无法满足供电可靠、绝缘保护等需要,必须要使用多台逆变电源并联的方式为电力设备进行高质量供电。本文首先介绍了两种常用的逆变电源并联控制方案,随后概述了短路限流、短路保护平滑切换等适用于并联逆变电源的短路保护技术,并通过仿真实验设计,验证短路保护技术的实用效果。结果表明,发生短路故障后,软件限流保护能够将输出电流限制在安全范围内;短路故障排除后,能够将输出电压快速升高至正常阈值,对电力系统的保护效果良好。

In some large capacity, multi-equipment power system, a single inverter can not meet the needs of reliable power supply, insulation protection, etc., must use multiple inverter parallel way for high quality power supply for power equipment. This paper first introduces two common parallel control schemes of inverter power supply, and then summarizes the short circuit protection technologies for parallel inverter power supply, such as short circuit current limiting and smooth switching of short circuit protection, and verifies the practical effect of short circuit protection technology through simulation experiment design. The results show that the software current limiting protection can limit the output current within the safe range after the short-circuit fault occurs. After the short-circuit fault is removed, the output voltage can be quickly raised to the normal threshold, and the protection effect of the power system is good.