• 186 views | 4 messages Discussion: LEAP
    Topic: Transmission and distributionSubscribe | Previous | Next
  • Liya Cai 7/26/2022

    Like

    Dear colleagues,

    I would like to ask how to understand the Transmission and Distribution in the LEAP model. For my model, I set the electricity losses of 6% and other energy losses. In the result, I choose the output by output fuels. But it shows that the output result of Transmission and distribution is much more than electricity generation and other energy generations. Is it sensible? See Figure 1.

    In the Great demo and Freedonia demo, the output by out fuels of Transmission and distribution is lower than energy generations and they have the similar trend with the electricity generations. See Figure 2 and Figure 3.

    Could you let me know the calculation theory of the Transmission and distribution? Should it be lower than the energy generation. Any assistance would be appreciated.
    Fig.1.jpg
    Fig.2.jpg
    FIg.3.jpg
  • Liya Cai 8/21/2022
      Best Response

    Like

    I have figured out this issue. There are some unit scale errors in the current account.
  • Charlie Heaps 8/22/2022
      Best Response

    Like
    1 Like

    That is certainly possible. Remember that LEAP is demand driven, so in terms of the order of calculation, first it calculates the demand for electricity. Next the T&D module operates and typically the outputs will match the demand for electricity, while the inputs will be greater based on the T&D losses. Next, most LEAP models will have a generation module that then dispatches various power plants to try and meet the requirements it sees (ie the INPUTS to the T&D module). But it may be that you don't have enough power plants to meet those demands. In those cases you may see either imports of electricity or there may simply be an unmet demand. Take a look at the module energy balance report for the electricity generation module in Results view and put "Balance Categories" on the chart legend. Here is an example based on Freedonia where I stopped any endogenous capacity additions, so that after a few years LEAP has to resort to imports to meet the requirements...
    screen.jpg
  • Liya Cai 8/22/2022
      Best Response

    Like

    Hi Charlie,

    Thank you so much for your detailed and patient reply. It makes me much more understanding of the calculation theory of the LEAP. Your assistances are always appreciated.


    Best,
    Liya