Impact of Multi-Distributed Generation on Key Parameter in Distribution System

Abstract

In recent year Distributed generation (DG) has become a point of interest in many countries due to several advantages such as improvement in power reliability, reduction of loss in transmission system, improved efficiency in network and lower environment impact. With this much benefit many networks working on integrate renewable energy source DG to the grid connection. Although it has many advantages, installation of DG in distribution network create several effect on the system. One of major effect is the fault current during a grid disturbance because DG changes the grid contribution to the fault current depending on the penetration level, locations and type of DGs, the operation of the protective system can be affected. In network that already has DG connected installing a new DG in network result in significant chance in fault current. Many research has been done such as effect of connecting DG in distribution network. This paper proposes an impact of multi-DG on distribution system characteristic when fault occur. System under studied is 22-kv distribution network with photovoltaic (PV) array and Wind Power Generation using PSCAD/EMTP program. Key parameter such as System current, voltage were obtained in simulation. Result from simulation reveal that DG has an effect on distribution system characteristic. Obtaining data from research can be used to design protection system for distribution system in the future.