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quintel / merit

A system for calculating hourly electricity and heat loads with a merit order
MIT License
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Load fraction for a certain plant type cannot be lower than a set minimum #8

Closed AlexanderWirtz closed 11 years ago

AlexanderWirtz commented 11 years ago

When determining how much capacity is needed to meet demand (Load), the price setting plant will only turn out to use a fraction of its maximum capacity. This fraction is called load_fraction and cannot be lower than some number. This minimum_load_fraction has to be researched per plant type. Chris Laumans probably knows them already.

The calculation should eventually make sure that a plant is not used less than its minimum_load_fraction and that the next plant in the merit order should be tried, etc, etc until a fit is found.

N.B. it is theoretically possible that no fit would be found. In that case, what do we do?

wmeyers commented 11 years ago

Maybe at that point you would get an overproduction of electricity ?

AlexanderWirtz commented 11 years ago

Yes or more than one plant of this type would have smaller than 1 load fraction. Alex

dennisquintel commented 11 years ago

Yes or more than one plant of this type would have smaller than 1 load fraction

What do you mean exactly?

AlexanderWirtz commented 11 years ago

@dennisschoenmakers I mean that instead of limiting the load fraction of the marginal plant alone, its closest cousins also get limited a little, so than none end up below their minimum_load_fraction. I understand this can be tricky and messy to program.

dennisquintel commented 11 years ago

@dennisschoenmakers I mean that instead of limiting the load fraction of the marginal plant alone, its closest cousins also get limited a little, so than none end up below their minimum_load_fraction. I understand this can be tricky and messy to program.

That's tricky indeed!

AlexanderWirtz commented 11 years ago

Let's first see what the calculation spits out. Currently a whole block of plants (i.e. the plant type) is marginal, but in future we want to split up the plant type blocks into individual plants with slightly different marginal costs. That is when this may become tricky. This issue is therefore meant as a 'heads up'

dennisquintel commented 11 years ago

Not relevant for the coming period. Might be implemented next year in a new project. Closing for now.