Activity for OpenDSS-G
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Davis Montenegro committed [r171] on Code
User manual updated.
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Adjusting aspect ratio of mini viewer.
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Adding topology estimator, context menus, and normalizing graphics for mini viz and DSS import tool. Adding examples for load allocation file import.
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Updating interfaces and precision when allocating using other units like kW and kVA.
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Loa allocation tool complete. Still missing documentation.
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Setting up environment for load allocation tool. Adding core functions for setting XfkVAs for loads and pf.
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Solving issue with the calculation of distance offset between E-Meters when having separated feeders and substations in the same model.
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Introducing customized reports for users to create their own reports based on the latest power flow results.
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Updating coord generation engine to try to match line length.
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Moving coloring functions for DSS scripting tool into actor for enabling multi-threading.
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Enhances and speeds up the text coloring in the OpenDSS scripting tool.
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- Enhances the scripting tool for enabling large script editing. Includes new functionalities for allowing toggle line comments, search and replace functionalities.
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Adding new voltage profile plot. This interactive actor brings in dynamic interaction with the graphical environment. Documentation still pending.
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Dude, Check it, verify the values and try something different. You got this. Best,
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tom carnell posted a comment on discussion Help
Hi, Thank you very much for the help, just to clarify, the transformer and substation are fine , its just the load and line values that are resulting in zero power readings? Thanks
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Hello, I recommend reviewing your line constants and load values—you're seeing significant voltage drops between line terminals, which indicates an issue. I performed a quick validation by disabling all loads, and the voltages still dropped below 0.9 per unit across the model. This suggests that the model requires a thorough review. For line constants in low voltage models you can use the following as reference: https://sourceforge.net/p/electricdss/code/HEAD/tree/trunk/Version8/Distrib/IEEETestCases/LVTestCase/...
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Also apologies, i dont know why the post came through 3 times
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Entered the show isolated command and no devices appeared so it seems everything is connected
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Apologies i am new to OpenDSS-G, this is all the data from the folder
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Apologies i am new to OpenDSS-G, this is all the data from the folder
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Apologies i am new to OpenDSS-G, this is all the data from the folder
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Hi, My apologies I wasn't very clear, the frequency has been changed deliberately as I am modelling a uk network. My problem is that i dont seem to be getting any power flow in my network despite connecting everything up. I presume this is most likely due to how i have connected my substation? or do i need a separate generator
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Hi, My apologies I wasn't very clear, the frequency has been changed deliberately as I am modelling a uk network. My problem is that i dont seem to be getting any power flow in my network despite connecting everything up. I presume this is most likely due to how i have connected my substation? or do i need a separate generator
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Hi, My apologies I wasn't very clear, the frequency has been changed deliberately as I am modelling a uk network. My problem is that i dont seem to be getting any power flow in my network despite connecting everything up. I presume this is most likely due to how i have connected my substation? or do i need a separate generator
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Hello, Please share your model (the whole folder), so I can give it a look. Also, you can from the scripting tool execute the command "Show isolated", which will show you the list of isolated devices (if any). Best,
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Hi, My apologies I wasn't very clear, the frequency has been changed deliberately as I am modelling a uk network. My problem is that i dont seem to be getting any power flow in my network despite connecting everything up. I presume this is most likely due to how i have connected my substation? or do i need a separate generator?
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Hello, Would you mind to elaborate on what the problem is? Is the problem that the frequency is set to a different frequency? Thanks,
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Hi, I am trying to build a simple low voltage distribution network composed of a substation, transformer and series of buses connected to single phase loads. The substation, transformer and loads have all been changed to 50Hz, with the substation providing 11kV (3Ph), and the transformer 11kv/0.4kv (3ph) with all loads (1ph) rated at 230V/8KW/PF=1. Voltage/current and power meters have been added to the load buses however all meter readings come back as zero. Any suggestions for whats causing this...
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Hi, I am trying to build a simple low voltage distribution network composed of a substation, transformer and series of buses connected to single phase loads. The substation, transformer and loads have all been changed to 50Hz, with the substation providing 11kV (3Ph), and the transformer 11kv/0.4kv (3ph) with all loads (1ph) rated at 230V/8KW/PF=1. Voltage/current and power meters have been added to the load buses however all meter readings come back as zero. Any suggestions for whats causing this...
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Enhancing coupling with A-Diakoptics suite using graphical objects in DSS-G. Refurbishing the object navigator window allowing users to navigate the model in the form of a tree with new exporting capabilities, including MS Excel and JSON formats.
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This analysis is made in the frequency domain and there are no dynamics involved. The results you are seeing in the report are in the steady statem which may fall into the Ik range. However, OpenDSS does not follow a specific standard for this analysis, it is up to you to verify how close it is to the standards you are studying. Best,
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Ariel Tavares posted a comment on discussion Help
Thanks, Davis. Those references were really helpful in understanding the fault study mode methodology. However, I still have a question (forgive my ignorance, I'm a beginner electrical engineering student): what type of short-circuit current is provided by the fault study mode report? Comparing it to the short-circuit current graph from IEC 60909-0, what value would it be? Would it be Ik'' (initial symmetrical short-circuit current), ip (peak short-circuit current), or Ik (permanent short-circuit...
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Hello, The fault study differs from a standard snapshot analysis that includes a fault. On one hand, the fault study follows a simplified approach, where the circuit model is energized by a small current injection at the connection point of each PCE. Each PCE is represented within the Y bus matrix by its Y primitive matrix. By injecting approximately 1 Amp at each PCE connection point, the resulting power flow solution reveals the short-circuit impedance (Zsc) at that location, as it can be derived...
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Davis, Thanks for the tip I would also like to ask a question about short-circuit studies with OpenDSS. 1- First, I would like to know what is the difference between the short-circuit current values shown in the Fault Study Interface and in the report generated by the "show fault" command. Is it Initial symmetrical short-circuit current Ik" or steady-state short-circuit current Ik or another type of short-circuit current? 2- Second, I would like to know which standard OpenDSS uses to perform short-circuit...
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Hi, Sure, this is doable. In this case one of the generators will work as reference and the other will be model as "PV" nodes (generator model 3). We have examples for this type of implementation using transmission systems, but the same principles will work in this case, check it out: https://sourceforge.net/p/electricdss/code/HEAD/tree/trunk/Version8/Distrib/Examples/NCIM/Xmission_System_Kundur2Area/ Best,
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Thank you very much Davis, this was very helpful. Still regarding this project, I would like to clarify a doubt about generators. This electrical system I sent in the attachment is an isolated system powered only by 3 turbo generators. How can I model this system using only the generators as the power source.
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Hello, In this case you are probably aiming at a QSTS simulation. For that, the VSD can be modeled as a load model 5 (rectifier) it is a simple model and works well for modeling rectifiers like the ones you find in electronic loads. Then, with DSS-G you can record the voltages at the buses during the simulation (see https://www.youtube.com/watch?v=gxBrClL0jLY ), which will record all the voltages during the simulation. Otherwise, to record other values you can use monitors to focus on specific areas...
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Hello Davis, Thanks for your reply. In response to your questions, The purpose of the study is to check the voltage levels on the system busbars, check the load on transformers and cables, and analyze the current profile and maximum currents to size the equipment. The simplified diagram of the system in question is attached.
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Updates documentation.
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Fixing speed up issue when using A-Diakoptics with DSS-G.
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Updating executable to the latest version (Distribution).
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Updating README_FIRST file,including instructions for generating executables.
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version 6.5.0.1 released
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OpenDSS-G updated /Installer/README.txt
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Version 6.5.0.1, compiled in LV 2024 Q3
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Updating to current version
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Reversing removal of routine
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Removing corrupted files.
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Adding A-Diakoptics compatibility frame.
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Updating OpenDSS-G connectivity with GIS.
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Miguel Hernandez committed [r146] on Code
File format for user manual was updated to HelpNDoc 9.7.
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Adding logos to the splash screen.
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Hello, I'm glad it worked. Remember to give us a review here https://sourceforge.net/projects/dssimpc/reviews/ . Also, there are other options for helping you work on your model like the DSSG scripting tool: https://www.youtube.com/watch?v=KieM_JwC2K4 And DSS Widgets: https://www.youtube.com/watch?v=KbqVt5po9TI There are more learning resources at the OpenDSS-G YouTube channel: https://www.youtube.com/@opendss-g8248 Best regards,
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Silvio Segura posted a comment on discussion Help
Dear Davis, Ok, it works very well! Thank you for your support, and congratulations on creating such a valuable tool for visualization and learning
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Hi Silvio, The sub folder is created when there is an energy meter present in the model. OpenDSS/OpenDSS-G will create a sub-folder with the name of the Energy Meters within the model, and in these folders you'll find the elements within the meter's zone ( see https://opendss.epri.com/MeterZones.html ). For the error you are getting, it is normally given that the model hasn't been solved by the time the query was performed. For that, I would solve the model first and then try the query again. I hope...
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Dear Davis, The keyboard reconfiguration works well—thank you for that. However, I have noticed a new issue when introducing new elements to the electric system and saving the project. DSS-G automatically creates a new directory named "sub" to store some of the original files being imported from OpenDSS. In this specific case of the new transformer was added to the system. When I attempt to edit it using the Inspector option, DSS-G throws the error shown in the attached image. I also observed that...
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We'll fix this issue in our next release. Best regards,
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Fixing issue with floating point decimal point when entering arrays in other countries.
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Hello, Yes, this is an issue related to the regional configuration. OpenDSS by default uses the dot character (.) as decimal separator. OpenDSS-G on the other hand, uses the local computer configuration, in your case since your laptop is using comma (,). This results confusing for OpenDSS. Sorry abut that. The solution is quite simple, you'll have to change your language settings in Windows and set the dot character as the decimal number separator. This is explained here: https://www.youtube.com/watch?v=9RwYdUyLNtI...
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Hello, I am using OpenDSS-G 64-bit version 6.10.1 on a laptop running Windows 11 Pro, version 10.0.22631. The software was installed using the default settings. When I enter the kVAs and kVs values, then click the "Check" option, followed by the "Apply" option, the data automatically changes by adding extra zeros to the correct values I originally entered. Additionally, the dot key on the keyboard does not allow data to be entered in these fields; it appears to be disabled for entering values. Please...
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Hello, This is an access problem. I wonder: Have you installed the program at the default folder (ProgramData) or did you decide to change the installation folder to "Program Files"? If so, that's the problem. To solve it, uninstall the program and reinstall using the default values. The problem is that if installed within the "Program Files" folder, Windows will limit the program access to the internal database unless the program is executed using Administrator privileges (right click -> Run as...
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VIJAY KUMAR posted a comment on discussion General Discussion
Hi I am not able to open any Test case and a popup window with Notification 402873 is coming. Please guide me how to resolve this.
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Hello, Well, this is because OpenDSS is a general purpose frequency domain simulator, meaning some specifics need to be implemented by the users normally using external interfaces such as TCP/IP (OpenDSS-G), COM/DLL or modify the code inside. For that, let me ask: What is the purpose of the simulation? Is it QSTS? Dynamics? Harmonics? What's the simulation resolution (model scale, detail?) What is he phenomena you are trying to observe? Let's start with those questions to better understand your request....
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Hello, There are some videos at the OpenDSS-G YouTube channel. For harmonics simulation check this one: https://www.youtube.com/watch?v=fJZ_ol44ics This video was made with version 4.5. In version 6, several features changed, for that, please check the following content: https://www.youtube.com/watch?v=KbqVt5po9TI https://www.youtube.com/watch?v=KieM_JwC2K4 There are other videos in that channel that can provide more info. There is also the user manual, which I'm sure can be helpful to start. I would...
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Evelyn posted a comment on discussion Help
Dear Roger, Thank you for your response. May I ask where I should input the commands you provided? Solve ! solve the power flow Solve mode=harmonics Additionally, if you could share any reference documents or videos related to similar issues, it would be incredibly helpful. Thank you again for your guidance. Best regards, Evelyn
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Hello, I am a beginner and I am trying to model an electrical system of an offshore oil and gas plant in order to perform power flow studies and short-circuit calculations. I need to model a VSD (variable speed driver) as a starting method for large motors and I have not found anything about this in the OpenDSS manual or documents. Could someone help me with this question?
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Roger Dugan posted a comment on discussion Help
The model is already 3-phase. What you need to add is harmonic spectra (Spectrum object) for each load. There is already a default spectrum defined for each PC element so, minimally, all you need to do is: Solve ! solve the power flow Solve mode=harmonics Be sure you have some Monitor elements distributed around the circuit. The Monitor devices will be automatically sampled after the solution at each frequency. Of course, to make it more interesting, you will probably want to change some of the default...
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Hello everyone, I am new to OpenDSS-G and currently trying to perform a three-phase harmonic power flow analysis using the IEEE 13-bus distribution system example. However, I am unsure how to proceed with this task. Could anyone kindly guide me on how to achieve this or provide any relevant resources or tutorials? Thank you in advance for your help!
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Hello everyone, I am new to OpenDSS-G and currently trying to perform a three-phase harmonic power flow analysis using the IEEE 13-bus distribution system example. However, I am unsure how to proceed with this task. Could anyone kindly guide me on how to achieve this or provide any relevant resources or tutorials? Thank you in advance for your help!
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Updating project validation.
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Setting files for next release
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Hello, Sure, lets start from the beginning: Do you have a circuit model you want to work on? Best regards,
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version 6.1.0.1
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Version 6.0.0.3
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Version 6 released
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Updating version files.
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Cleaning up
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Hello, Yes, we changed the interface starting a couple of versions back given that the one you are displaying was very hard to maintain and wasn't flexible enough to provide real-time help and information to the user. Please check the following video, it explains why we did this change and the benefits of it: https://www.youtube.com/watch?v=_uQlgjvuKjc We are currently updating the documentation to reflect these and more changes. Best regards,
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Adam Hreszczyk posted a comment on discussion General Discussion
Ok, maybe I misunderstood what Conrtoller linked button is doing. But, why can't I go to menu like it was before.
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