The Effect of Relay Coordination on Cost - A Sample of a Medium Voltage Feeder

Abstract

The continuity of electrical energy is always indispensable for us. The way to the continuity of electrical energy is through reductions in power cuts. In our country, great importance is attached to energy continuity and efforts to reduce power cuts. In this research, it is aimed to prevent unnecessary power cuts by making the correct diagnosis of the regions experiencing unnecessary power cuts, and the simulation made in the LabVIEW program aims to provide more benefits to the distribution company in the region. Delayed earth overcurrent trip setting(Io>), instant earth current trip setting(Io>>), delayed overcurrent trip setting(I>) and instant overcurrent trip setting(I>>) variables have adjusted according to a certain algorithm in relay coordination. Ultimately, with the correct implementation of selectivity in relay coordination, information have can be obtained about how much the distribution company will benefit and how much the power cuts that have negative effects on people(pecuniary, spiritual, psychological, etc.) are reduced. The values calculated in this simulation were applied to the relays in the field. Thus, it has aimed that the electricity operated devices of the people in the region, which experience many and unnecessary power cuts, are less damaged and the distribution company in the region will benefit more.