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Energy Meter

Beginners
2020-02-28
2020-02-29
  • Lucas Guedes

    Lucas Guedes - 2020-02-28

    Hi,

    I have a energyMeter element with losses greater than kWh in a large circuit model.

    What can be causing this issue?

     
  • Roger Dugan

    Roger Dugan - 2020-02-28

    I don't know. See if you can trouble-shoot your model.

    Are you sure you are not looking at a report where losses are reported in W and load power in kW?

    Do a Show Losses report after a peak load snapshot and see if something obvious shows up.

     
  • Lucas Guedes

    Lucas Guedes - 2020-02-28

    Actually the register "kWh" was storing 0 (zero) but the zone kWh and zone losses registers seem to be ok.

    What's the difference between the registers 1 and 5 (kWh and Zone kWh) ?

     
  • Roger Dugan

    Roger Dugan - 2020-02-28

    Register 1 is the kWh flowing in the element to which the meter is connected. Register 5 is kWh in all the Load elements in the energymeter's zone. Is the power able to bypass the Energymeter in some way? Check the connections.

     
  • Lucas Guedes

    Lucas Guedes - 2020-02-28

    Apparently not.
    Here are the top feeder connections:

    new circuit.alimIFA13 bus1=BMT409762.1.2.3,basekv=13.800000000,pu=1.0
    
    new energymeter.Meter element=line.5251818,terminal=1
    
    new line.5251818 bus1=BMT409762.1.2.3,bus2=BMT1864094.1.2.3,Phases=3,Linecode=MT-41-3-3,Length=0.026892050,Units=km
    
    new line.6023138 bus1=BMTSE-SE-6021599.1.2.3,bus2=BMT409762.1.2.3,Phases=3,Linecode=MT-41-3-3,Length=0.028874080,Units=km
    

    Line 6023138 is currently open at bus 'BMTSE-SE-6021599'.

    Line 5251818 feeds all other circuit elements.

    Is there anything wrong?

    Thanks for your answer btw.

     
    • Miguel Hernandez

      The second terminal of your second line is connected to the source. Is that intentional?

       
  • Roger Dugan

    Roger Dugan - 2020-02-28

    When you do snapshot power flow, do you have power in line.5251818?

     
  • Lucas Guedes

    Lucas Guedes - 2020-02-28

    When I run snap power flow I get power on the loads but not on the upstream elements. How is that possible?

     
    • Miguel Hernandez

      The second terminal of your second line is connected to the source. Is that intentional?
      It might be that you have alternative paths to the loads. You can try with the "show loops" and "show isolated" commands to detect any undesirable connections.

       
  • Roger Dugan

    Roger Dugan - 2020-02-28

    It is also possible the Energymeter branch is being modeled as an unloaded lateral tap. Check the bus connections. The Energymeter will still pick up a radial zone from the point at which it is connected. This probably gets most of the loads, so the values of the loads get tabulated properly.

     
  • Lucas Guedes

    Lucas Guedes - 2020-02-29

    I found out the issue is happening when I have loads with power (kw) =0.
    When I change the power from 0 to 0.001 it seems to work properly.

    I don't know why it happens though.

     

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