Download - 2 - The Ipsa Interface
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
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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
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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]