Topic: Peak Power requirementsSubscribe | Previous | Next
Bob Muhwezi 4/11/2018
1 Like Hi LEAP team.
Could any body help me understand how peak power requirements are calculated in LEAP. Am doing a least cost capacity expansion plan (using LEAP optimization) but am finding the peak power requirements calculated by LEAP to be much lower than my actual peak demand.
Also, looking at the actual availability in the results view, some of my generators have very low availability ie they are being heavily curtailed in-spite the fact that there is unmet load in some of the years.
Any assistance would be highly appreciated.
Regards
Emily Ghosh 4/23/2018
1 Like Hi Bob,
As you know, the Energy Load Shape includes the % of annual energy generated in each time slice. LEAP estimates peak power based on the data in the Energy Load Shape in the following manner:
1. LEAP multiplies the % annual energy by the total energy requirement for the electricity generation module to calculate the energy demand in each time slice. (% energy in time slice * total energy in MWH = time slice energy in MWH)
2. LEAP divides the energy demand in each time slice by the number of hours in the time slice interval to find the power demanded in the time slice (time slice energy in MWH / time slice in hours = time slice power in MW)
3. LEAP looks at all of the time slice power demands in a given year and assigns the maximum as the peak power requirement for that year. This value may be lower than the actual peak demand since it is an estimated value. The accuracy of this value is dependent on the number of time slices specified - the estimated peak value will be closer to the real peak when a higher number of time slices are used. The drawback to using more time slices is that it can significantly increase the calculation processing time.
As for the actual availability, if there is sufficient capacity available it is unclear why it wouldn't be used. Are there any limitations being placed on the module? For instance, carbon limits or renewable energy targets? Resource limitations?
Thanks,
Emily
Emily
Fran Lallana 7/12/2018
1 Like Hi Emlily and Bob,
one thing you can do to enhance the accuracy of the model calculation of annually maximum demand, is to add one additional time slice of only one hour of duration. There you put the maximum year demand expressed in MWh (wich will the maximum MW power demanded). If you do so the energy dispatched will change very little, but the peak power demand will be accuratelly modeled.
Hope it hepls,
Fran.
Emily Ghosh 8/1/2018