Etap Modeling

Load Flow (or Power Flow Analysis) is one of the most important analysis to be performed on a Power System. Load Flow results help in maintinaing proper operation of a Power System and also to design and extend the existing Power System. Various industry standard softwares are used for load flow studies. ETAP is such an application for performing various analyses on simulated power networks. This tutorial series is based on using ETAP for Power System Modeling, Design and Analysis. In this tutorial, we’ll show you how to build one-line diagram of a power network in ETAP and how to perform Load Flow Analysis of the system using Load Flow Toolbar.

For an introduction to basics of ETAP and an overview of ETAP toolbars, there’s a tutorial Introduction to ETAP for Power System Modeling & Simulations . For building and simulating this power network, open ETAP and follow the steps.

Power flow using ETAP Software

Enter four new elements into the one-line diagram and proceed to enter the input data for each element. Once all the elements have been connected and the input data has been entered, you may proceed to run a Load Flow Calculation. Extend the size of Bus2. Enter four more elements into the one-line diagram.

Proceed to connect them and enter the required data. Once all the elements have been connected and the input data has been entered, you may proceed to run a Load Flow Calculation. Extend the length of Bus2 towards the right side.

Rotate Gen1 180o using . Connect & proceed to enter required input data for LF. Once the Generator has been connected and the input data has been entered, you may proceed to run a Load Flow Calculation.

Video Tutorial on Load Flow Analysis using ETAP

Extend the length of Bus1 towards the right side. Copy elements T1, Bus2, Lump1, Cable1, T2, Bus4 and Lump2. Move elements from Dumpster and connect them to Bus1. Insert a normally open Tie Breaker between Bus4 and Bus5. Rubber band both branches connected to Bus2 and Bus7. Cut all the highlighted elements.

ETAP Transformer Modelling

Insert a Composite Network and connect between Bus2 and Bus7. Open the Composite Network and move the elements from the dumpster into the Network1 window. Connect the cables back to their original buses. Insert High Voltage Circuit Breakers at the indicated locations.

Insert Low Voltage Circuit Breakers inside the Composite network and place them before the Lumped Loads. Results after running Load Flow analysis are given below:.

  1. Here is a complete video tutorial for all the steps listed in this article. The video tutorial is of two parts.
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  5. I am trying to model a Wye(ungrounded)/Wye(grounded)/buried delta tertiary transformer in ETAP.
  6. The HV side is the source of fault current and is ungrounded as specified.
  7. When I model it as a two winding transformer, I am able to select a checkbox for buried tertiary.
  8. However, when I place a L-G fault on the Wye(grounded) LV side, I see no ground fault current.
  9. However, when I model this as a three winding transformer with the buried delta as the third winding, when I place a L-G fault on the Wye(grounded) LV side, I see ground fault current.
  10. What is the correct approach here?
  11. DC Load Flow
  12. DC Short Circuit Analysis
  13. Battery Sizing Analysis

Importance of Load Flow Studies:

When a specific analysis Mode is selected from Mode toolbar, various analysis options are available through the Analysis Toolbar. Format for Analysis Toolbar under Load Flow Mode is show here.

As depicted clearly from above toolbar, once Load Flow Mode is selected; we can select any option from its Analysis Toolbar to run the load flow calculations, display results & alters, generate and export report and even collect live data from a real power system.

Load Flow Analysis using ETAP – Part 2

This tutorial provides basic introduction to ETAP, it’s features and capabilities. In next tutorial, we’ll be building model of a small power system. We shall build its one line diagram and then we’ll analyze the system for load flow.

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