Fault Examination of a 400kV Switchyard of 500MW Thermal Power Plant

Abstract

The present paper deals with Load flow and stability analysis of thermal power plant. In the thermal power plant switchyards plays vital role in various control, security and monitoring features that enable robust routing of power from generators to loads through a complex network of transmission lines. Analysis of such switchyard is the key and most important task for planning of the Generation plant. In the past there have been many widespread blackouts in interconnected power systems, so it is essential to assure that power system must operate more stablely and reliably. In this present discussion, the adopted system of 500MW Thermal power plant comprises a generator bus connected to 6 load buses and 1 utility bus interconnected with 400kV transmission lines. Power flow studies and fault analysis are simulated in Power World simulator environment. These studies include the operating points when faults occurred in the system for the system reliability, line outages and its impact on other transmission lines such as incoming or outgoing lines and also on bus sections. Prior to planning and construction of substation, these studies help to calculate indices that reflect the reliability performance of the system. These analyses give the detail overview for future growth of power generation and subsequent extension of switchyard.