Effect of Fault Detection on The Resilience and Self-Healing in Islanded Micro-Grids

Subject Areas : International Journal of Smart Electrical Engineering

Reza Ebrahimi ¹ , Mohammad Hasan Moradi ² , Alireza Jahangiri ³

1 -
2 - Department of Electrical Engineering , Hamedan branch, Islamic Azad University, Hamedan, Iran.
3 - , Department of Electrical Engineering , Hamedan branch, Islamic Azad University, Hamedan, Iran.

Received: 2025-06-22 Accepted : 2025-08-19 Published : 2026-01-03

Keywords: flexible operation, short-circuit fault detection, wavelet transform, micro grid, resilience, self-healing- Renewable Energy,

Abstract :

Today, with the expansion of the power grid and the increasing need for energy, the presence of highly resilient resources to prevent more frequent power outages is felt. The goal of this article is rapid detection of various types of faults, short circuits, and their compensation, leading to improved resilience and better operation of two islanded micro grids. The network under study is a 14-bus network selected according to IEEE standards. This network transforms into 2 micro grids in the event of a fault or incident. The micro grids are disconnected from the main network but remain interconnected with each other. This model is examined in three stages. The first stage is fault detection. The fault is identified and eliminated in the shortest possible time using the proposed algorithm based on the initial traveling wave currents caused by the fault using wavelet transform. The second stage deals with fault compensation using D-STATCOM. In the third stage, flexible operation is performed using responsive loads and CPP (critical peak pricing) prices based on game theory (cooperative game). Then resilience parameters and self-healing index are checked. Necessary loads of the total load are considered in assessing self-healing. Therefore, by using quick and timely fault detection, which leads to the use of voltage drop compensators, it can be concluded that the MOP index of consumers is also ensured. Additionally, considering the interconnection of micro grids, any micro grid that requires energy can be supplied by another micro grid.

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