Overcurrent relay coordination tool for radial distribution systems with distributed generation

Poonyapa Sookrod, P. Wirasanti
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引用次数: 12

Abstract

The conventional structure of distribution systems is evolving rapidly due to the high penetration of distributed generation (DG). DG may have a detrimental effect on protection coordination of overcurrent relays regarding varying short circuit levels. Overcurrent relays are necessary to ensure the reliability of power system by avoiding malfunction and the unnecessary outage of the healthy part of the system. The relay settings have to be changed depending on capacity and location of installed DG. It is complexity to analyze all operating conditions. Therefore, the effects of DG presence on the existent relays must be investigated in order to maintain protection coordination. To overcome relay coordination problem, overcurrent relay coordination tool is proposed in this paper. This tool is developed using concept of adaptive protection scheme. Relay setting parameters are set automatically in response to changing systems. Furthermore, this proposed tool is suitable for the complex future radial distribution systems.
带分布式发电的径向配电系统过流继电器协调工具
由于分布式发电的高度普及,传统的配电系统结构正在迅速演变。DG可能对过流继电器在不同短路电平下的保护协调产生不利影响。过流继电器是保证电力系统可靠性所必需的,它可以避免系统正常部分的故障和不必要的中断。继电器设置必须根据安装DG的容量和位置进行更改。分析所有的运行工况是很复杂的。因此,为了保持保护协调,必须研究DG的存在对现有继电器的影响。为了克服继电器协调问题,本文提出了过流继电器协调工具。该工具是利用自适应保护方案的概念开发的。继电器设置参数自动设置响应变化的系统。此外,该工具适用于未来复杂的径向配电系统。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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