Peak and Transformation table tags

[Ryo Ishida]

Hello All.

I am sorry to keep asking questions, but could you tell me about peak equations and Transformation table tags?
Always, Thank you for your help.

Ⅰ. Peak equations
There have been similar discussions before.
(1)For wind power, if NCAP_PKCNT is set to 0.3 and AF is set separately to 0.5, does the availability contributing to the peak become 0.3 by overriding AF or 0.3(PKCNT) x 0.5(AF) = 0.15?

(2)If COM_PKRSV is defined, is it correct that the total capacity required is the capacity taking into account the contribution ratio to the peak as defined in (1)?

Ⅱ.I am having trouble understanding the essential difference between TFM_MID and TFM_UPD. Can you please tell me?

Can you please explain the definitions of TFM_TOPINS and TFM_TOPINS-A?



Thank you in advance！

Ryo

[Antti-L]

I can try and answer the I(1)+I(2) ones (the rest is left for VEDA experts):

> (1)For wind power, if NCAP_PKCNT is set to 0.3 and AF is set separately to 0.5, does the availability contributing to the peak become 0.3 by overriding AF or 0.3(PKCNT) x 0.5(AF) = 0.15?

NCAP_PKCNT defines the peak contribution factor, which is applied to the capacity, provided that the PCG of the technology is a single peaking commodity (e.g. ELC). So, the capacity would be assumed to contribute to the peak by a factor of 0.3.  If the PCG is not such a commodity, the factor would be by default applied to the output flow level instead of the capacity, and in that case your capacity would be contributing to the peak by a factor of 0.3×0.5 (due to the output flow level being contributing by 0.3). However, it can also be controlled by defining PRC_PKAF, and if you do so, the capacity would again be assumed to contribute directly by the NCAP_PKCNT factor when defined, i.e. in your case by 0.3.

> (2)If COM_PKRSV is defined, is it correct that the total capacity required is the capacity taking into account the contribution ratio to the peak as defined in (1)?

Yes, but it in addition to capacities, it includes also any flow levels for those technologies that have their output flow level contributing to the peak (i.e. technologies that don't have the PCG defined as a single peaking commodity nor PRC_PKAF, as indicated above). And both by taking into into account the NCAP_PKCNT factor.

[Ryo Ishida]

Antti-L san

Thank you for your reply!
・Please let me confirm this just to be sure. In the wind example, I assumed that the output was electricity. Am I correct in assuming that a peak availability factor of 0.3 would then be adopted?

Thank you in advance！

Ryo

[Antti-L]

Dear Ryo, I am sorry to be causing so much bother to you, but I answered your question already.

> In the wind example, I assumed that the output was electricity. Am I correct in assuming that a peak availability factor of 0.3 would then be adopted?

It is not sufficient information to say "I assumed that the output was electricity". As I already explained, what you have defined as the PCG is also critical. (PCG= primary commodity group)

The peak contribution factor is applied to the capacity, provided that the PCG of the technology is a single peaking commodity (e.g. ELC). So, in that case the capacity would be assumed to contribute to the peak by a factor of 0.3.  If the PCG is not such a commodity, the factor would be by default applied to the output flow level instead of the capacity, and in that case your capacity would be contributing to the peak by a factor of 0.3×0.5 (due to the output flow level being contributing by 0.3). However, it can also be controlled by defining PRC_PKAF, and if you do so, the capacity would again be assumed to contribute directly by the NCAP_PKCNT factor when defined, i.e. in your case by 0.3.

[Ryo Ishida]

Antti-L san

I'm sorry I couldn't express myself better.
If the output commodity of the wind process is "ELC" only, is the primary commodity group also "ELC"?
I assume I will not use PKAF.

Ryo

[Antti-L]

ELC is indeed a commodity group by itself, and the technology must have a peaking commodity as an output in order to contribute to the peaking equation. But the group that you have defined as the PCG is also critical, and it doesn't need to contain ELC at all, although by default it would be ELC, if ELC is the only output and you have not explicitly defined the PCG. Under VEDA, you can verify the PCG from the Details pane in the Items Detail module.

Note that the picture you attached above does not give any conclusive information about what the PCG might be.