IEEE-9bus network self-qualification using inverse time-characteristic current protection in a Simulink/MATLAB environment

Abstract

As a result of the steadily increasing demand for electricity, and the current structure of electric grids under centralized control not suitable to meet the

complex energy demands, concepts such as micro grids, smart grids, multi-source power systems and virtual power stations are emerging along with new concepts such as the Multi-Agent System (MAS) and the Internet of Things and self-healing. Our electric power grid is being transferred to a more decentralized and highly efficient energy management system [4].

The ability to fault tolerant is one of the most important characteristics of electrical networks, as it gives self-healing for flexibility and rapid control. The self-healing that we will present in this article depends on the use of the principle of islanding by using inverse definite over current relay that can make decision by separating the faulty part and changing current paths within a network IEEE-9bus with the aim of continuing to feed the loads despite the fault.

This article will explain the work of current protection and the effect of coordination between it on feeding loads, then it will be applied to a model of the IEEE-9bus network and study the ability of this device to protect it in the event of a fault at one of the network nodes after building it within the Matlab environment