atpdesigner 2011 getting started

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Getting Started Simulating Electrical Power Networks using ATPDesigner 16.10.2006

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1 GETTING STARTED SIMULATING ELECTRICAL POWER NETWORKS ................................ 3

1.1 ATPDesigner – Vision of a Graphical User Interface .......................................................... 3

1.2 The Conclusions for the Design of ATPDesigner ? ............................................................ 3

1.3 ATPDesigner and ATP - A Powerful Team for Power Engineering.................................... 3

2 DESIGN OF THE ELECTRICAL POWER NETWORK ............................................................... 4

2.1 Creating a New Power Network .................................................................................. 4

2.2 How to Delete the Elements of the Default Power Network ? ................................... 5

2.3 List of Available Network Elements ..................................................................................... 5

2.4 Changing the Settings of Network Elements ...................................................................... 6

2.5 .NET-File – Container of the Power Network ....................................................................... 7

2.6 Integrated File Browser ................................................................................................... 7

2.7 Main Menu ............................................................................................................................. 7

2.8 Program Settings .................................................................................................................. 7

3 USING ATP TO CALCULATE VOLTAGES, CURRENTS, …..................................................... 8

3.1 Starting to Simulate Power Networks.................................................................................. 8

3.2 Short-Circuit Analysis – ATPs Steady State Analysis and More ....................................... 8

4 PROCESSING .PL4- OR COMTRADE-FILE TO CREATE DIAGRAMS .................................... 9

4.1 The Most Easy Ways to Open a .PL4 - File and to Create a Diagram ... .......................... 10

4.2 Signal Analysis Methods ............................................................................................. 12

4.3 DFT (f) - Amount and Phase of the Fundamental Frequency........................................... 12

4.4 Harmonics – Presenting the Harmonic Frequencies in Addition..................................... 13

4.5 Spectrum – Frequency Spectrum Presented as a Bar Diagram....................................... 14

5 LIBRARY OF NETWORK ELEMENTS..................................................................................... 15

6 ATPDESIGNER - WEB SERVICES.......................................................................................... 16


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1 Getting Started Simulating Electrical Power Networks ATPDesigner is a Control Center for the Interactive Design and the Simulation of Electrical Power Networks. ATPDesigner can be used as a graphical pre-processor to the ATP version of the Electromagnetic Transients Program (EMTP) executed on Windows operating systems e.g. Windows XP, Windows 2000 and Windows NT. In addition ATPDesigner assists also the user analysing short-circuits, faults, disturbances, etc. in electrical power networks. ATPDesigner provides the user

� to design electrical power networks, � to create diagrams of voltages and currents, � to analyse voltages and currents using the Discrete Fourier Transformation (DFT), � to calculate frequency spectrum of voltages and currents, � to process COMTRADE files, � to test protection relays, � to create libraries of network elements and � to do a lot of things more in the field of power engineering.

1.1 ATPDesigner – Vision of a Graphical User Interface Without any doubt ATP is one of the best software tools to study transient phenomena of electrical power networks. But also without any doubt ATP is difficult to use. Therefore some years ago the idea was born to design and develop a graphical user interface for Windows operating systems, which makes it possible to use the ATP with a minimum of knowledge about ATP. Using such a GUI software tool (Graphical User Interface) it must be possible for a student of electrical engineering to use ATP e.g. for exercises and projects after some days initial training.

1.2 The Conclusions for the Software Design of ATPDesigner Following the intuitive design of Windows based software tools to minimise the initial training of the users, ATPDesigner was and will be further developed using C++, classes, threads, background tasks. The use of a high sophisticated development tool guarantees a extremely high stability of the software tool and the continuos evolution of ATPDesigner in the future.

1.3 ATPDesigner and ATP - A Powerful Team for Power Engineering Currents and voltages which are of interest shall be calculated using the ATP, one of the best software tools for the simulation of electrical power networks. The interaction between ATPDesigner and ATP will be explained below more in detail.


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2 Design of the Electrical Power Network

2.1 Creating a New Power Network

The user should first create a new power network using the New button of the Main Toolbar or using the corresponding menu item New in the main menu File. ATPDesigner creates the default network shown in the figure below. The default power network always consists of several typical network elements:

� Network Infeed Network 1 � Single-Circuit Line Line 1 � Circuit Breaker Cb1 with Measuring Location M1 � Circuit Breaker Cb2 � Two Busbars

Figure 1: Default Power Network

The user can now add, change, move, rotate, delete, copy & paste, etc. network elements e.g. Network Infeeds, Lines, Circuit-Breakers or auxiliary elements e.g. Text Frames or Pictures. Several network elements e.g. lines, Transformers, etc. are available to design an electrical power network. The network elements can be added via the main menu Network Design or the corresponding buttons in the Network Design Toolbar or the Right Mouse Button Menu.


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New network elements can be added by the Drag & Drop technology usual for windows programs: � First pressing the corresponding Toolbar Button. � Select the Drawing Direction. � Move the new network element to the target location in the graphics view e.g. a node of an

existing network element. � If necessary connecting one node of the new betwork element to the other network element. � Open the settings dialog via a left-mouse-button-double-click on the graphical symbol of the

network element. � Change settings in the network element specific settings dialog.

2.2 How to Delete the Elements of the Default Power Network ? ATPDesigner provides to functions to delete network elements:

� Delete One Network Element o Select the network element by a Left Mouse Button Click o Move the mouse cursor “over” the selected network element o Open the Right Mouse Button Menu o Click on the menu item Delete

� Delete All Network Elements

o Open the main menu Edit o Click on the menu item Erase All Or

o Use the toolbar button

2.3 List of Available Network Elements

ATPDesigner supports a lot of different network elements to design and simulate electrical power networks. Some of these network elements correspond directly with ATP models, but some of these network elements are self developed based on fundamental ATP models.

� Network Infeeds � Busbars � Single-Circuit Lines � Double-Circuit Lines � 3-Pole-Circuit Breakers � 1-Pole-Circuit Breakers � Switch � 1-Phase and 3-Phase - Load Impedances � Shunt Impedance � Transformers � BCTRAN Transformer � XFORMER Transformer � SATURABLE Transformer Component � Cable (CABLE PARAMETERS) � Autotransformers


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� Generators � Connections � Serial and Parallel Impedances � Textframes � Pictures � Grounding Systems � Static Power Network Sources � 3-Phase Symmetrical Source � Empirical Function � External .ATP-FileSplitter � Probe � Fault Type and Fault Locations (Up to 3 Fault Locations with 3 Fault Types) � Measuring Locations � Current and Voltage Transformers � Capacitive Voltage Transformers � Current Transformer Saturation � TACS Data Card � TACS STAND ALONE � Nonlinear Element e.g. L(i) � Multi Frequency Source � Harmonic Frequency Source � MOV - Metal Oxyd Varistor (ZNO Fitter) � Admittance Function Y(s) ot Y(z)

2.4 Changing the Settings of Network Elements The settings of each network element can be read and changed using the network element specific settings dialog. 1. First the network element should be selected with a Left Mouse Button Click on the graphical

symbol of the network element. The selected network element will be now drawn in light gray. 2. The settings dialog, which is specifically designed for the different network elements, can be now

opened with a Left Mouse Button Double Click. All these dialogs are explained in the chapters of the help file. Please read also the How to ... section in the help file.


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2.5 .NET-File – Container of the Power Network

The .NET-file contains all data which are relevant for the electrical power network: - Data to describe the graphical representation of all network elements used in the power network. - Electrical and mechanical data to define the physical behaviour of all network elements used in the power network. The name of the .NET-file is displayed in the header of the corresponding client window e.g. C:\ATPDesigner\Data\Network_1.net shown in Figure 1. Please Note It is absolutely sufficient to save only the .NET-file. All other files will be only temporarily created and can be reconstructed using ATPDesigner based on the .NET-file. The data stored in the .NET-file will be secured using a checksum algorithm. The user should not change any data in the .NET-file by hand e.g. using a text editor, because the .NET-file may be corrupted after such modifications. ATPDesigner doesn't accept .NET-files with a corrupted checksum. In this case ATPDesigner presents the error message shown below and reloades a power network with default values. All information contained in the corrupted .NET-file are now lost.

2.6 Integrated File Browser ATPDesigner assists the user managing the different file types via the integrated File Browser. Nevertheless the standardised functions of Windows based software e.g. New, Open, Save, Save As .., Print, etc. are also available either in the main menu File, using the buttons of the Main Toolbar or the standardised hotkeys.

2.7 Main Menu The main menu and all sub menus are explained in detail in the section Main Menu of the help file.

2.8 Program Settings Several settings, which are ATPDesigner specific and independent of the data of the electrical power network, will be saved in the .INI-file and not in the .NET-file. The .INI-file will be read automatically during startup. ATPDesigner creates a new .INI-file, if the .INI-file could not be read. The .INI-file will be saved if ATPDesigner will be closed. The content of the .INI-file is explained in the help file.


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3 Using ATP to Calculate Voltages, Currents, …

3.1 Starting to Simulate Power Networks

The network simulation can be easily started only pressing the button or CTRL + R. ATPDesigner writes the ATP based models of the network elements into the .ATP-File and starts ATP in a background task. Now ATP calculates voltages and currents and stores these results into two output files. The .LST-File contains � a copy of all commands of the .ATP-file, � additional comments and error messages written during the runtime of ATP (American EMTP

User Group, References) and � optionally the results of the so called Steady State Analysis of the electrical power network. The .PL4-File contains the calculated voltages and currents as sampled values e.g. to create Diagrams. ATPDesigner reads the sampled values out of the .PL4-File and process these data using integrated Signal Analysis Algorithms e.g. to display the Frequency Spectrum. The steps to create a diagram based on an existing .PL4-File will be explained in detail in chapter 4.

3.2 Short-Circuit Analysis – ATPs Steady State Analysis and More ATPDesigner is also able to process the results of ATPs Steady State Analysis stored in the .LST-file. The so called Short Circuit Analysis Results can be directly presented in the power network graphics using the tooltips technology pressing the F4 key.

Figure 2: Short Circuit Analysis Results using Tooltips


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4 Processing .PL4- or COMTRADE-File to Create Diagrams .PL4-Files or COMTRADE-Files can be displayed using an external diagram viewer e.g. PlotXY, which is part of the ATP installation setup or using the integrated Diagram Viewer of ATPDesigner.

The external diagram viewer can be started via the button or in parallel to ATPDesigner as a parallel task. The .PL4-file can be also automatically converted to the COMTRADE standard IEC 60255-24 and presented using any external COMTRADE viewer. The integrated diagram viewer will be automatically started, if a .PL4-file or a COMTRADE-file had been loaded e.g. via a double-click

on the file name in the File Browser .

Figure 3: File Browser in ATPDesigner

Read more details in the chapter ATPDesigner and COMTRADE of the help file.


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4.1 The Most Easy Ways to Open a .PL4 - File and to Create a Diagram ... The .PL4-file can be also opened via the Right Mouse Button Menu.

Figure 4: Right Mouse Button Menu

If the power network is displayed in the topmost view of ATPDesigner, click the right mouse button and select the menu item Open Diagram (.PL4 - File) ... The .PL4-file which corresponds to the topmost power network will be loaded and first the Dialog to Select the Signals to be Displayed in a Diagram will be presented. After selecting voltages and/or currents the diagram will be automatically created in a new view.

Figure 5: Dialog to Select the Signals to Be Displayed in a Diagram


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A little bit more comfortable method to create a diagram using only toolbar buttons.

Step 1:

Press button in the bottom right toolbar for network elements to open the .PL4-file which corresponds to the topmost .NET-file.

Step 2:

The dialog shown in

Figure 5 will be now displayed. Select the node names of the signals which shall be displayed in the diagram as explained above. Step 3: After the Ok button had been clicked, the diagram will be drawn. The figure below shows as an example the graphics of the power network and the corresponding diagram using the internal diagram viewer.

Figure 6: Power Network and Diagram

ATPDesigner assists the user with several context sensitive, Right Mouse Button Menus depending on the type the topmost view (e.g. power network or diagram) and depending on the position of the mouse cursor (e.g. located "over" a network element or not).


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4.2 Signal Analysis Methods ATPDesigner provides also the analysis of voltages and currents which are stored as sampled values in the .PL4-file or COMTRADE-file. The signal analysis methods are based on the Discrete Fourier Transformation, which is used to calculate the frequency spectrum of voltages and currents. The figures below show some examples. The settings of the signal analysis can be changed in the settings dialog Diagram Settings. Read the details in the corresponding chapter of the help file.

Figure 7: Diagram Settings

4.3 DFT (f) - Amount and Phase of the Fundamental Frequency The amount and phase angle of the fundamental frequency e.g. 50 Hz or 60 Hz of all selected voltages and currents are shown in a spread sheet as shown in the figure below.


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4.4 Harmonics – Presenting the Harmonic Frequencies in Addition In addition the frequency spectrum of one signal can be also calculated. First one of the signals in the spread sheet DFT(f) must be selected with a left button mouse click.

Now, the tab Harmonics must be selected. The figure below shows the result. Depending on the sampling rate used during the network simulation process, more or less frequency components of one signal will be presented.

Figure 8: Frequency Spectrum as a Spread Sheet


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4.5 Spectrum – Frequency Spectrum Presented as a Bar Diagram The frequency spectrum can be also shown a s abar diagram selecting the tab Spectrum.

Figure 9: Frequency Spectrum drawn as a Bar Diagram


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5 Library of Network Elements ATPDesigner assists the user to manage his specific network elements using a Library of Network Elements. The user can transfer network elements to and from the library via the clipboard. Therefore the user must only use the Copy & Paste functions to work with a library. This can be done using the well known menu items, right mouse button menus, hot keys, toolbar buttons, etc. The libraries can be easily saved to and loaded from e.g. a hard disk. The data are secured with a checksum. Therefore the library may be corrupted modifying the data by hand. A corrupted library can not be further used and not repaired. ATPDesigner uses a tree control to present the content of the library. The first tree level presents the name of the network element class e.g. Load Impedance, Network Infeed, etc. The network elements are presented in the second tree level using the user specific name of the network element.

Figure 10: Library of Network Elements Displayed in a Tree

Read more in the chapter Library of Network Elements of the help file.


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6 ATPDesigner - Web Services ATPDesigner Home Page: http://people.freenet.de/atpdesigner ATPDesigner E-Mail Support: [email protected] ATPDesigner provides directly the use of the web services:

� Main menu Help � Menu item Web Services

atpdesigner 2011 getting started

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