SIMULATION OF POWER DISTRIBUTION NETWORK USING RTDS

Abstract

Accurate modelling of a distribution system is utmost important as it is becoming more complex day by day. Distribution system is growing at a very rapid scale due to a sharp increase in the number of users catered by the system. Each and every node in the distribution system is important because many users are connected to a single node. So it is very important to model a power distribution system with all components for analyzing all the condition and for future planning. Real time digital simulator (RTDS)isa complete digital system which can be used as a very powerful tool for analysis of a complete distribution network. This digital simulator, called RTDS is equipped with an integrated system combining real-time and off-line software. RTDS in lIT, Roorkee has 6 racks. Each single rack can simulate 144 single nodes or 48 three phase nodes. In this work I have simulated the IEEE 123 node test feeder in RTDS. The whole distribution network has been divided into 6 small subsystems. Every subsystem is - interlinked with each other with the help of transmission line model. RTDS software includes accurate power system component models required to represent many of the complex elements - which make up physical power systems. This feature of RTDS has helped in accurate modelling of the overall system. For different loading conditions, voltage profile of different nodes has been plotted to observe the effect of change in load at node voltage. Fault has been created on the source as well as load side and the voltage profile of some critical nodes has been analyzed. Different observation has been concluded in different cases. In all the cases plots of different parameter on the selected nodes have been plotted. The overall simulation done can help to analyse distribution system performance in real time.