Abstract
Overall, a power-flow study is a steady-state assessment whose goal is to specify the currents, voltages, and real and reactive flows in a power system under a given load conditions. This paper presents a comparison of common power flow techniques in the Tehran metro power distribution system at the presence of non-linear loads. Moreover, a modelling, simulation and analysis of this power distribution system is implemented with the Electrical Transient Analyser Program (ETAP) software. In this assessment, common power flow techniques including the Newton-Raphson (NR), Fast Decoupled (FD), and Accelerated Gauss-Seidel (AGS) techniques are provided and compared. The obtained results (total generation, loading, demand, system losses, and critical report of the power flow) are analysed. In this paper, we focus on the detailed assessment and monitoring by using the most modern ETAP software, which performs numerical calculations of a large integrated power system with fabulous speed and also generates output reports. The capability and effectiveness of the power flow analysis are demonstrated according to the simulation results obtained with ETAP by applying it to the power distribution system of the Tehran metro. In developing countries such as Iran, off-line modelling and simulation of power grids by a powerful software are beneficial and helpful for the best usage of the electrical energy.
Highlights
1.1 BackgroundThe purpose of power flow studies is to plan ahead and account for various hypothetical situations
The results comprise large power distribution systems emanating from high voltage (H.V.), medium voltage (M.V.), and low voltage (L.V.) networks, equipment and loads; the data used for the assessment objective are in the form of one line diagrams of the complete and actual power grid of the Tehran metro starting from high voltage substations (HVS) and the power transformer at the grid up to the loads
A power flow based simulation using the Electrical Transient Analyser Program (ETAP) were developed to find the optimum location of the distribution system unit for a load profile improvement and the minimization of power losses in the test distribution system
Summary
The purpose of power flow studies is to plan ahead and account for various hypothetical situations. Power flow is one of the most important tools utilized by electrical experts for the design, planning, control, and analysis needed to determine and specify the best operation for power distribution systems and the exchange of power between utility companies. In the past few years, electrical engineers have been dealing with power system studies by using new software tools. A load flow assessment method might take a long time, and prevent the achievement of an accurate result for a power flow solution due to continuous changes in power generation and demand. The essential data achieved from a load flow study is the magnitude and phase angle of the voltage at every feeder and bus, and the real and reactive power flowing in every line [5, 6]. Maintaining a high level of system security is one of the more important aspects of power systems that should be noted, as well as the economic operation of these systems [8, 9]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
