Implement CHP into network (generator or link?)

[Elias Althoff]

Dear all,

by now I have quite a complex electric network and it works very well.

Now I want to do the next step and couple the sectors. I added another set of buses with the carrier heat and added a load. Now I wanna connect my generators to those buses. I always intented to add a heat source, which is why when I implemented my generators I already seperated them into CHP and non-CHP. Now, I see that in the example, the CHP is implemented as a link. Can I also use my CHP plants, which are implemented as generators? Or is any sectorcoupling done with a Link?

Also: In the example, the CHP is connected to a gas-storage. Is that necessary? Or can I leave the gas supply out of the equation for now?

Best wishes,

Elias

[Fabian Neumann]

Hi Elias,

as soon as you want to represent a technology that has multiple inputs
or outputs, you'll need to use a link; in case of CHP

gas (input) --> heat (output)
--> electricity (output)

Then you have 3 buses involved: gas, heat, electricity.

The gas node then needs energy provision in form of a gas "generator"
that feeds gas into the system.

We usually model CHPs as backpressure plants with fixed ratio
heat/electricity (that's how most would behave).

Best wishes,

Fabian

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Dr.-Ing.
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Postdoctoral Researcher

Department of Digital Transformation in Energy Systems
Institute of Energy Technology
Technische Universität Berlin

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