Reliability Evaluation of Distribution Systems with Distributed Generation using DIgSILENT PowerFactory

Authors

  • Mr.Ravishankar B S, Mr.Vijayendra V K, Dr. K T Veeramanju

Abstract

The future distribution systems will be a bi-directional system with Distributed Generation (DG) sources connected at various levels. With rapid growth of these DGs in a distribution system, there will be both positive and negative impacts on the system. Positive impacts include reduction in system loss, improvement in voltage profile, enhanced reliability and environmental safety. However, improper placement and allocation of DGs will result in negative impacts such as increased losses, reduced reliability, harmonics and power quality issues. The important factors to be considered for integration of DG into the distribution system are location of DG in the system, suitable size of the DG, number and rating of DG. All these factors will affect the system performance factors, mainly the system losses, system reliability and availability. With higher penetration of DG into the distribution network, it will be necessary to study the impact of such generation on the different aspects of distribution system performance. The present work focuses on reliability evaluation of distribution system with integration of such DGs, typically in an urban scenario By using the reliability tool of DIgSILENT PowerFactory software, simulation method is adopted to analyze the impacts of integration of DG in terms of improvement in distribution system reliability indices and reduction in system losses for different scenarios. Based on the simulations results and after analysis of the distribution system, overall system results are summarized by focusing on the installation of DG of suitable capacity and at suitable location which are main factors affecting the system losses and system reliability.

Keywords- Distributed Generation (DG), RBTS, Simulation, DIgSILENT PowerFactory).

Abbreviations: DG-Distributed Generation; RBTS-Roy Billinton Test System; OH-Overhead; SS-Sub-station; KPTCL-Karnataka Power Transmission Corporation Limited; CESC-Chamundeshwari Electricity Supply Company; NVDI-Node Voltage Deviation Index.

Published

2020-12-21

Issue

Section

Articles