Load flow analysis in island mode operation using ETAP software

Abstract

It is known that the energy is essential for the expansion of any country. The Load flow analysis is a technique used to determine the characteristics of the power system under stable conditions and to evaluate the various operating states of an existing system. In this paper, Electrical Transient Analyzer Program (ETAP) was used. ETAP can be used to calculates bus voltages, currents, branch power factors and power flows throughout the electrical system. ETAP allows us to swing, voltage regulated, and unregulated power sources with multiple power grids and generator connections. With ETAP’s advanced Load Flow module, also create system model and validate with ease and obtain accurate and reliable results. In this research, was selected an experimental system for example a city where a national network connected with four distributed generation. This distributed generation was operated depending upon solar energy, wind power, Hydroelectric and natural gas. In the normal case, the national network operates in parallel with the solar station and the wind station to feed all loads in the city. But, in the case of national network outage from city, only feed task loads in the city in island mode through these four distributed generation. With priority given to the work of the stations, the stations operates at the least cost of operating condition. Load flow analysis can be done for the two cases mentioned above. The purpose of this paper is to introduce the Load Flow Analysis module, and to provide instructions on how to run a load flow study.