Storage processes in peaking constraints
I'm only discovering this topic now. Thanks for bringing this issue up Antti, I would probably not have noticed this issue.

However, for me it seems to be the case that it is essential to take into account the electrical generating capacities for storage processes.

For example, in my model, I work with a specific pumped storage plant (Coo, Belgium) with following characteristics:
Storage capacity: 0.02031PJ
Electrical capacity: 1.164 GW

With a NCAP_PKCNT equal to 1, the contribution of the pumped storage to the peaking equation would be 0.25*(2/24)*0.02031 PJ = 4.23125*10^-4 PJ

Now suppose I would have the following TS division:
(WI, SP, SU, FA) with each 25% of the year
Day, Night, Peak, in which Peak represents the 2 hours of the day with the highest demand.

Following your reasoning with only the storage (energy) capacity would result in the following:
Maximal contribution to peak demand = (365/4)*0.02031 PJ = 1.853 PJ

According to the limited electrical capacity, the maximal contribution to the peak demand would however be: 1.164*CAP2ACT*0.25*(2/24) = 0.764748 PJ, which is significantly smaller.

NCAP_PKCNT would therfore need to be 1807.4 (instead of 4379.3 when taking into account only the energy storage capacity).

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Storage processes in peaking constraints - by Poncelet_K - 17-01-2014, 09:23 AM

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