The effects of distributed generator on distribution system reliability

Abstract

The purpose of this paper is to study the effect of distributed generator (DG), which is solar photovoltaics (PV) integrated into the distribution system of Provincial Electricity Authority (PEA) in terms of cost, Feed-in Tariff (FiT) and reliability. The distributed generator (DG) under this study is connected to a 22 kV distribution system of Thanyaburi substation on the PEA, which is a part of Thailand's distribution system. In addition, when the installed DG is increased, cost, Feed-in Tariff (FiT) and reliability are considered. The System Average Interruption Frequency Index (SAIFI), The System Average Interruption Duration Index (SAIDI) and Outage Cost are assessed as reliability indices. The reliability indices will be calculated using data obtained from simulation and analysis of power distribution system models created in DIgSILENT. The overall results can be summarized by focusing on the capacity of DG and the location of DG, which are important factors capable of affecting the reliability indices.