Creating and Using Study Cases in DIgSILENT PowerFactory. Case P.M. Anderson 9 bus.

1. Dr. Francisco M. Gonzalez-Longatt, fglongatt@ieee.org .Copyright © 2009 1/23
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Francisco M. Gonzalez-Longatt, Dr.Sc
Manchester, UK, September, 2009
Exercise:
Creating and Using Study Cases
P.M. Anderson 9 bus

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This tutorial describes how to create a Study case for
simulations of the dynamic behavior of P.M. Anderson 9
bus test system.
Exercise:
Creating and Using Study Cases
P.M. Anderson 9 bus
Francisco M. Gonzalez-Longatt, Dr.Sc
fglogatt@fglongatt.org.ve
Manchester, September 2009

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1. Introduction

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1. Introduction
• Study Cases (IntCase, ) define the studies to be
performed in the modeled system.
• Study Case store all the definitions created by the user
to perform calculations.
• These allowing the easy reproduction of results even
after the deactivation of the project.
Case base
Study case 1
Study case 2
Study case N
.
.
.
Study Cases allow perform network studies,
including load-flow, various short-circuits,
time-dependant simulations, etc.

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1. Introduction
• PowerFactory allow use of the objects stored inside
them objects to recognize:
• The parts of the network model (grids and
expansion stages) to be consider for calculation.
• The calculations (and their settings) to be
performed over the selected parts of the network.
• The study time.
• The active variations.
• The active operation scenario.
• The calculation results to be stored for reporting.
• The graphics to be displayed during the study

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1. Introduction
• A study case with a reference to at least one grid or
expansion stage has to be activated in order to enable
calculations.
Expansion stage
Expansion

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1. Introduction
• A project that contains more than one grid, which has
several expansion stages for design alternatives, or
which uses different operation scenarios to model the
various conditions under which the system should
operate, requires multiple study cases.
• All the study cases of a project are stored inside the
'Study Cases' folder ( ) in the project directory.

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2. Creating a study
case

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2. Creating and Using Study Cases
• Open the Data Manager and go to the Study Cases
folder.
Load flow Study Case
was previously defined

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2. Creating and Using Study Cases
• Right-click the folder and select New --> Study Case
from the context sensitive menu.

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2. Creating and Using Study Cases
• Enter the name of the new case in the dialogue that pos
up and edit (if required) the default settings.
Dynamic Study Case

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2. Creating and Using Study Cases
• A new Study Case is developed:
Before After

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2. Creating and Using Study Cases
• Only one study case can be active at any time.
• To (de)activate a study there are two ways:
1. Using 'Current Study Case' window
2. Using Data Manager:

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2. Creating and Using Study Cases
• To (de)activate a study case go to the main toolbar and
use 'Current Study Case' window
Initially the Study
Case is empty,
without network

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2. Creating and Using Study Cases
• To (de)activate a study case go to the Data Manager.
• To activate a dormant study case place the cursor on its
name, right-click and choose Activate

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2. Creating and Using Study Cases
• A study case can have more than one grid.
• Only the objects in the active grids will be regarded in
the calculations.
Study Case
Network 1 Network 2

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2. Creating and Using Study Cases
• Open the data manager and go to the Network Data
folder.

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2. Creating and Using Study Cases
• Right-click the grid you want to add to your calculation
and select Add to Study Case from the context sensitive
menu.
• The grid will be activated and graphics will be opened
(after a selection by the user).

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2. Creating and Using Study Cases
• The Network object is included in Dyamic Study Case.
Before After

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2. Creating and Using Study Cases

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2. Creating and Using Study Cases
• To remove an active grid go to the Data Manager, select
Remove from Study Case.

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