Network Modeling and Load Flow Analyses

Network Modeling and Load Flow Analyses

With the goal of building transmission system planning expertise, a five-day workshop on load flow modelling and analysis in the Power System Simulator for Engineers (PSS/E) network planning software was conducted on June 13-17, 2016 in Dar es Salaam, Tanzania for the Tanzania Electric Supply Company, Ltd. (TANESCO).

The training was conducted through a series of theoretical PowerPoint presentations delivered by one trainer while the other trainers were available to the participants for assistance.  The presentations were followed by a series of interactive PSS/E exercises.

Day 1

  • Introduction to PSS/E software working environment
    • Program overview
    • Graphical interface
    • Program options and settings
    • Working with files
    • Building new model
    • Hands-on exercise
  • Network modelling
    • Basic modelling principles in EATP regional model (bus names, numbers, areas, voltage levels, etc.)
    • Buses
    • Loads
    • Branches
    • Hands-on exercise

Day 2 

  • Network modelling
    • Machines
    • Transformers
    • Shunts
    • Breakers
    • Hands-on exercise
  • Graphical Representation
    • Create single line diagram
    • Changing data using diagram
    • Diagram properties
    • Hands-on exercise
  • Modifying network data
    • Renumbering
    • Deleting/Join/Moving
    • Scaling
    • Hands-on exercise

Day 3

  • Power flow simulations
    • Data checking
    • Parameter settings
    • Running LF simulations
    • Reports
    • Network limit violations
    • Hands-on exercise
  • Contingency analyses
    • Preparation of sub-system, monitoring, contingency and distribution-factor data files for running the automatic contingency analysis
    • Configuration file builder
    • Running automatic contingency analysis 
    • Interpreting reports of contingency analysis
    • Hands-on exercise
  • Creation of network models for TANESCO
    • Overview of current TANESCO models
    • Modelling quality
    • Handling the raw data in PSS/E (copy from excel sheets etc.)
    • Harmonization requirements (power balances, codification etc.)
  • Model validation
    • Main principles
    • Model validation algorithm
    • Data requirements
  • Introduction to short circuit modelling
    • Input data
    • Training program for short circuit analyses