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 would be appreciated.
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
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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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:
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
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
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 would be appreciated.
Thanks
Last edit: tom carnell 2025-07-07
Hello,
Would you mind to elaborate on what the problem is? Is the problem that the frequency is set to a different frequency?
Thanks,
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
Last edit: tom carnell 2025-07-07
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,
Apologies i am new to OpenDSS-G, this is all the data from the folder
Apologies i am new to OpenDSS-G, this is all the data from the folder
Apologies i am new to OpenDSS-G, this is all the data from the folder
Entered the show isolated command and no devices appeared so it seems everything is connected
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/
Best,
P.D. Next time please add your files in a single ZIP file. This will make easier to get access to them.
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
Dude,
Check it, verify the values and try something different. You got this.
Best,
Also apologies, i dont know why the post came through 3 times