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DIgSILENT PowerFactory
Tutorial
Exercise 7: Transient Analysis
• Plots are one of the many different ways in which a VI displays the information about
the variables it has. Plots show all sorts of time-domain variables depending on other
variables. Plots can be used in different ways (subplots, subplots with two y axis, X-Y
plots and FFT plots). In this part of the Tutorial plots are used as subplots.
I.4.1
Running a Transient Simulation
The main toolbar shows two icons for starting (
ulation.
 Click on the start (
) and stopping (
) the transient sim-
) icon. Enter an execution time of 10s.
 Press Execute
The simulation is now started. The output window will show messages about the events
that are processed, when they are processed. The predefined graphs (in the ''Generators''
Virtual Instrument Panel) will start to show results.
All plots can be scaled automatically in the x- respectively y-direction to the best view by
clicking on the icons
and
. Furthermore for a better analysis of certain time period
or a closer look at the graphs, the x- and y-axis can easily be zoomed in using the 'Zoom
x-Axis' icon (
I.4.2
) and the 'Zoom y-Axis' icon (
).
Defining New Virtual Instruments
The Tutorial Manager has already defined the Virtual Instrument Panel called ''Generators''. It contains two plots, displaying the speed and the turbine power of the generator
PP1_G1. Now you are going to create the same plots for the generator PP1_G2:
 Open (if not already open) the Virtual Instrument Panel ''Generators'' and click on the
the "Append new VI's'' (
) icon.
 In the dialog that pops up, select the "Subplot (Visplot)'' object.
 Set the desired number of new subplots (in this case 2).
 Click on the
icon to arrange the plots by pairs (if you prefer a vertical
arrangement use the
icon).
 Double click on the first empty (or bottom-left) subplot to open its edit dialog and
define the variables to display.
 In the ''Curves'' field (bottom of the edit dialog), double click on the empty Element
field to select an element. A data browser, showing the elements with defined variable
sets, pops up (Figure I.3). Double click on the PP1_G2 icon to select it.
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