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Maj 2016

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April 2014

Hello!

Following the question that most of you had about the strange results in the nodal prices in section A of the economic dispatch project, I would like to draw your attention to the following explanation:

The locational marginal price (LMP) is defined as the cost of the next MW of generation. So, the reason why in the intervals where only Gen_11 and Hydro are dispatching the price is $35 is because the next MW of generation would have to be supplied from Gen_12 as Gen_11 and Hydro are both outputting as much as they possibly can. Gen_11 is outputting 600MW which is its limit due to the Max Capacity property. Hydro is constrained by the Max Capacity Factor Day property which is set to 25%. The average generation from Hydro over the entire day is 125MW which is 25% of its Max Capacity which is 500MW. This means that in every period throughout this day it cannot produce one more MW and thus the LMP jumps over this generator in the price stack to Gen_12.

Hope I made it more clear.

Regards,

Mohamadreza

Anmäl missbruk

Lärare Mohamadreza Baradar skrev inlägget 15 april 2014

En användare har tagit bort sin kommentar

Conor O' Malley kommenterade 16 april 2014

When only Gen_11 and Hydro are dispatched the price is 15$ and not 35$. That is why the result is strange. I agree that the answer should be 35 $ but this is not the answer that plexos provides

Sebastian Kehne kommenterade 28 april 2014

Hello!

I made a simple example to show that Plexos does not calculate the marginal price. The grid consists of:

-One node and no transmission lines

-2 Generators at this node: Gen_11 (15 $/MWh and 600 MW max. capacity) and Gen_12 ( 35 $/MWh and 300 MW max. capacity)

- Constant load with 600 MW

Plexos delivers 15 $/MWh for all times. It should be 35$/MWh. -> You find the example in the attachment:Disproof marginal price

Best regards

Sebastian

2 personer gillar kommentaren

April 2013

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