IPSA+ Network Drawing
Ipsa 2 TutorialsIntroducing the Ipsa Interface and Network
Drawingwww.ipsa-power.comThe Ipsa TourIn this tutorial you will
learn about;What Ipsa doesThe Ipsa InterfaceDrawing A Basic
NetworkRunning a Load Flow StudyChanging Display Styles
www.ipsa-power.comThe Ipsa TourIpsa is a power system analysis
programPower systems come in many different sizesIpsa is used to
model high voltage AC and DC networksThese are typically:50Hz or
60HzVoltages range from 1000V to 400kV and abovePower levels from
1000 watts to 1000MW and aboveThree phase networks
www.ipsa-power.comIpsa Power SystemsExamples of power systems
that Ipsa is used for;Distribution networks11kV to 132kV covering
cities, counties and statesTransmission networks11kV to 400kV
covering countriesIndustrial networks400V to 33kV covering
factories, petrochemical refineries, docks and harboursIslanded
systems400V to 33kVOff shore oil and gas platformsShip board DC
systems
www.ipsa-power.comIpsa Power SystemsIpsa allows all power system
components to be quickly modelled;Busbars, switchboards, ring main
unitsGenerators, wind turbines, PV arraysLoads, capacitor and
reactor banks, load profilesCables and overhead linesTransformers,
phase shifting transformers, quad boosters, voltage
regulatorsSTATCOMs, SVCs, switched capacitors and reactorsCircuit
breakers, isolators, switches
www.ipsa-power.comIpsa Power SystemsWhat does Ipsa do?Load flow
analysisCalculation of voltages, currents and power flows across
the networkIdentifies voltages outside limitsIdentifies
overloadsRuns voltage profile and contingency studies
www.ipsa-power.comIpsa Power SystemsWhat does Ipsa do?Short
circuit analysisFault currents and current flows under short
circuit conditionsChecks circuit breaker dutyPlots fault
waveformsCalculates AC and DC components, plus sequence
componentsCalculates retained voltages
www.ipsa-power.comIpsa Power SystemsWhat does Ipsa do?Harmonic
analysisCalculation of harmonic voltages, currents and power flows
across the networkVoltage waveform displayTHD and maximum harmonic
calculationsPlots harmonic network impedances to identify resonant
frequencies
www.ipsa-power.comIpsa Power SystemsWhat does Ipsa do?Transient
analysisCalculation of voltages and current across the network
against timeGovernor, AVR and controller modellingFault clearance,
fault ride through and critical clearing time studiesLoss of load,
generation, and circuitsAdvanced controller modelling
www.ipsa-power.comIpsa Power SystemsWhat does Ipsa do?Protection
gradingChecking and co-ordination of protection relay
settingsActual fault flow currents used to calculate operating
timesCheck circuit breaker operation in transient studies
www.ipsa-power.comThe Ipsa Interface
MenusToolbarsRight click on a space to show and hide the
toolbars
www.ipsa-power.com
The Ipsa Interface
Click these buttons to show and hide the side bar and progress
windowsThe side bar allows navigation between diagrams, data tables
and results windowsThe Progress windows displays any analysis
messages, including the all important error messages and
warnings!www.ipsa-power.com
The Ipsa ToolbarsFile Operations:New, Open,Add Diagram,Save,
PrintDiagram Navigation:Select,Zoom, Pan,Delete, Lock Diagram,Draw
ModeAC Components:Generators, Loads,Busbars, Branches,Shunts,
Transformers,Motors, Filters,Switches,
Protectionwww.ipsa-power.com
The Ipsa ToolbarsExtras:Universal Machines,Switched
Capacitors,STATCOMsIn-line Voltage RegulatorsBranch Knee
PointsAnnontationsDC
Components:Generators,Motors,BatteriesMotor-Generator SetsAnalysis
Tools:Load Flow,Fault Level,Protection Grading,Harmonics,Transient
Stability,Python ScriptingGroup Tools:Create Groups,Edit
Groups,Switch Groups,Filter By Groupwww.ipsa-power.comCreating
NetworksThere are 3 main ways of creating a new network;Draw the
electrical systemConventional single line or one line
diagramGeographic diagramDiagram with an image backgroundCreate a
network without a diagramCopy network data into the Ipsa data
tablesImport from other sources, e.g. PSS/ewww.ipsa-power.com
Create a New Network
Go to File and New network to start the wizardChoose the type of
diagram that will be created.
More diagrams can be added laterChoose the diagram properties
including background colours and images.
These can be edited laterFinally set the network properties.
These can also be edited later.Click Finish and you now have a
new network and are ready to start adding network components.The
System Base MVA is used for per unit conversions. The per unit
system is easy, but its in a different
tutorial!www.ipsa-power.comDrawing NetworksThere is one simple rule
when creating any network in Ipsa
Busbars must be created first!
Busbars include switchboards, junctions and tee points. Any
point where two or more things are connected together
www.ipsa-power.comDrawing NetworksRadial components are ones
with just one busbar connection
These includeMotorsGeneratorsLoadsCapacitor banks
www.ipsa-power.comDrawing NetworksBranch or line components are
those with two busbar connections
These includeCablesOverhead linesTransformersThese all need at
least two or more busbars to be drawn first
www.ipsa-power.comDrawing NetworksThere are other components
which are placed onto branches or lines
These are: Circuit breakersSwitchesProtection devicesIn-line
Voltage Regulators
www.ipsa-power.com
Drawing BusbarsThis is the main AC component toolbarOnly the
busbar button is enabled for an empty network, since busbars must
be drawn first!Notice the down arrows next to the buttons. These
drop down to give extra symbols.www.ipsa-power.com
Drawing BusbarsClick on the Busbar button to start drawing
busbarsClick on the diagram canvas to place a busbar on the
diagramEvery click adds a new busbar to the diagram.
Busbars names are created automatically and can be
edited.www.ipsa-power.comDrawing Radial Components
Click on the Generator button to add a synchronous generatorThen
select the busbar to connect it toFinally click on the diagram to
place the generator symbol.www.ipsa-power.com
Now Draw a LoadClick on the Load button to add a static loadThen
select the busbar to connect it toFinally click on the diagram to
place the load symbol.www.ipsa-power.com
Now Add a BranchClick on the Branch button to add a cable or
overhead lineThen select the first busbar to connect it toFinally
click on the second busbar to complete the
connectionwww.ipsa-power.com
Now Add a Branch
Knee points, or corners, can be added by clicking on the
diagramwww.ipsa-power.comNow to add data to the networkComponent
data can be viewed and edited in two ways:From the network
diagramDouble click on components to edit their propertiesAllows
one component at a time to be editedFrom data tablesSpreadsheet
tables allowing cut, copy and paste operationsView and edit many
componentsTables can be filtered
www.ipsa-power.comComponent Dialogs
Double click on any component to display the properties
dialog
The component properties can now be viewed and editedProperties
are split across multiple tabsClick OK to make changes or Cancel to
forget themwww.ipsa-power.comComponent Dialogs
Double click on the line to set the data for a load flow
studyClick OK to save these changesLines are used to represent
cables, over-head lines and all other connectionsEnter a value of
0.1 for the Reactancewww.ipsa-power.comComponent Dialogs
Double click on the load to set the data for a load flow
studyClick OK to save these changesLoads are used to represent
constant power loads such as general load, heaters and non-rotating
devicesEnter a value of 10MW and 8MVArwww.ipsa-power.com
Running Load Flow Analysis
This is the Load Flow analysis settings dialog. The default
parameters will be fine, just click OK to run a Load Flow study.But
first we need to tell Ipsa which busbar will be the slackAll
networks must have a slack busbar.
The slack busbar is used to supply (or absorb) any power which
isnt provided by other generators in the network.
This makes it easy to take losses into account since you dont
need to specify the power output of the generator at the slack
busbarIf you remember back you didnt need to set any data for the
generator.
The first generator added to a network defaults automatically to
be the slack generatorSelect the Busbar1 and click OK to
continue
Since we only have one generator we just need to select the
associated busbarIf your results look like this then
congratulations!
Youve just run your first load flow analysis in Ipsa!
The diagram should be showing the busbar voltages and power
flowswww.ipsa-power.comChanging the Display Styles
The tabs allow different display styles to be set up for
different analysis resultsClick on the Load Flow tab to change the
way the load flow results are displayedChange the display options
to suit your needs.
Here weve chosen to display the units on the diagram for busbar
resultsClick OK to make these changes and go back to the
diagramwww.ipsa-power.comChanging the Display Styles
Your load flow results should now look like this.
Here weve also displayed the units for the power flows as
well.Power flows are shown in MW and MVAr.
The busbar voltages are shown in per unit, so 0.992 pu is the
same as 99.2% of nominal voltage.www.ipsa-power.comThe Next
StepsWell done! This completes the Ipsa Interface tutorial.
Check out the website for further tutorials covering other
aspects of Ipsa.
www.ipsa-power.comThanks for using Ipsa!We welcome all comments,
please email us at [email protected]
