Parametric Analysis

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cspchathu
Selecting input variables

Dear All,
When we are selecting input variables, should there be correlation between the variables?If so how to select them?
I did a parametric analysis using PPA price, SM, number of field subsections, and TES (hrs) for my thesis on CSP. my supervisor asked how do you select these variables as the inputs? what are the correlation between them? what are the statistics behind selecting of inputs? are they have linear relationship or another relationship? How do I answer those questions? please help me.

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cspchathu
why LCOE vary with PPA price? and Why is IRR result NAN?

Hi,
I did a parametric analysis using SM, NFS (nos of field subsections), PPA price,and TES. a summary of the results are attached herewith. My understanding is, if the NFS, SM, and TES are not changed, the LCOE cannot be changed. am I correct? but according to the results, it changes when the PPA price changes. Please give me the reason/s. this can happen due to involving of many iterations. is that the reason?
Other thing is why is IRR result show NAN (not a number) result (please see cell no-30:O)?

Thank you,

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colin141
Parametric analysis varying DC to AC ratio while keeping AC constant

Hi,

I have been trying to run a parametric analysis to vary the DC to AC ratio and the GCR, while keeping the AC size constant. I know that I can vary the DC to AC ratio easily but this seems to vary the AC size. I'd like to keep the AC size constant.

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Nisarg
Questions in inverter module database and output ac power of a solar inverter.

Hi there,

I am doing a research project on Solar PV plant modelling. I got the excel file of inverter parameters at https://sam.nrel.gov/sites/default/files/sam-library-cec-inverters-2015-...

Certain queries I have, please answer if possible.

1. Where can I get AC Output power (Pac) generated by the inverters?

2. What is PDc0?

3. Is Vdcmax given in excel file the same as
VDC described in SANDIA Inverter model?

Thank you in advance.

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Achilles11
Parametric analysis - NPV not available as input?

Hi, I'd like to run a parametric analysis for a small commercial PV system, where the business simply invests their own money to build the system. I've been able to use NPV as a parametric analysis input before for case simulations of PPA solar systems, but I don't see it as an available input for this simple commercial system case simulation.

Ideally, I'd like have IRR as an input, but short of that I'm trying to estimate IRR based on the real discount rate and NPV.

Thanks!

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cspchathu
LCOE shows a negative value

I did a parametric simulation for a parabolic trough system. Input parameters were, solar multiple, TES hrs and number of subsections. when their values are 10.5, 0, and 8 respectively, the LCOE shows a negative value. can any one explin why?

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cspchathu
Generated power sudden drop behavior

Dear all,
I simulated a parabolic trough system of 10 MW. Then a parametric simulation was carried out for TES hours and system output. Little later sunset, a sudden drop of generated power can be identified. It drops down up to around 8500 kW. then the generated power shows a constant value at 8500 kW for some time period depending on the TES hrs. I can't understand this behavior, specially the sudden drop.
As well as there is another unpredictable behavior as attached figure.

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dburdjal
PV Generation Peak Varies During Parametric Analysis

Hello,

I am doing some parametric analysis where I am varying the PV capacity (5-10-15 kWDC), battery bank capacity (0-3-6-12 kWh), and dispatch choice (day ahead, day behind, auto grid target). While the annual power generated (annual kWh) remains pretty constant for a particular PV capacity, it seems that the production for the 5 kWDC option varies quite significantly according to the battery bank capacity.

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cspchathu
The input boiler pressure could not be achieved with the resource temperature entered

Dear all,
Can any one help me on below issue?
I did a simulation putting inputs as described in the video given in https://www.youtube.com/watch?v=FuwAPdv_l8Q except the location and nameplate capacity.
When I do a parametric simulation, a waning message came as "Parametric #30: time 31251600.00 { Power Block 4 }:
The input boiler pressure could not be achieved with the resource temperature entered". Have I done any wrong thing?

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clarknd
NOCT Parameter inputs in Parametric Analysis

Paul,

It appears that mounting standoff and array height do not get changed when I set them to different values in a parametric analysis. It seems that whatever the setting is in the module tab is what is applied across the board in a parametric analysis.

Best,

Nathan

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