Resiliency Enhancement of Power Distribution System Using Distributed Generator

Abstract

The occurrence of natural disasters may be low, but their impacts are very high. Such high impact events may interrupt the power supply for a long time or even causes a permanent disconnection of power from a substation in case of extreme. To endure this situation, enhancing power system resilience may play a vital role in continuously supplying uninterrupted and quality power. This paper proposes a methodology to make the power delivery system more resilient by correctly placing distributed generators (DG) in the distribution system. Along with resiliency enhancement, suitable allocation of DG can also improve system performance by minimizing energy losses and improving the voltage profile of distribution load points. A fuzzy logic method-based DG placement approach is proposed, which targets maximum customer restoration considering the number of customers and vulnerability of distribution lines connected to a load point. The vulnerability of lines has been investigated considering the extreme impact of wind on it. The size of DG has been evaluated, aiming reduction of system power losses. The validation of methodology has been tested on an Indian rural distribution system. The result confirms that the proposed approach can save considerable energy losses and augmentation of voltage profile in low voltage distribution buses in pleasant weather and supply power to many customers after wind-driven calamities.