Doubt about grid feed-in

[UserPV]

Hello, because in simulations the value of the "grid feed-in" is lower than what I indicate in "PV energy during observation period", since they are annual value.

Ex:
grid feed-in: 1670kwh.
PV energy during observation period in first year: 1645kwh.

Also, where can I find the theoretical (lossless) annual energy value (kwh)?

Thanks!

[developer_mh]

Hi UserPV,

could you provide an example project file so that we can take a look at it?

Thanks a lot, kind regards,

Martin

[UserPV]

On 8/16/2019 at 5:42 AM, developer_mh said:

Hi UserPV,

could you provide an example project file so that we can take a look at it?

Thanks a lot, kind regards,

Martin

You can use as an example an example of PVSOL, such as plant P90 in germany. The Grid feed-in is 20,062,175 kWh/year, while in "PV energy during observation period" is 18,926,713 kWh / year for the first year.  I did not understand why the difference for more energy injected into the power grid.

[developer_mh]

Hi UserPV,

in the case of the example project "Solar Park Neuhardenberg incl P90", we have module degradation as well as P50/P90 analysis. See these topics for more information:

https://help.valentin-software.com/pvsol/2019/pages/financial-analysis/bankability-p50p90/

https://help.valentin-software.com/pvsol/2019/pages/pv-modules/module-degradation/

 

These two factors effect the amount of energy that is fed into the grid in the first year. If you set the P50/P90 bankability to 50 and the module degradation to 100% (no degradation), then hese two numbers are equal:

You can play around with the factors to see how they influence the results.

Kind regards and good luck,

Martin

[Felix Galan]

I have a similar case in which the annual generation in the results, does not match with the annual generation of year 1. 

I have set P50 in bankability, for a 25-year observation period, and the following module degradation profile:

Year 1: 99%

Year 31: 87%

The result for year 1 within the observation period is around 0.4% lower than the estimated annual generation.

PV Generator Energy: 23,848 kWh/y

Energy Year 1: 23.724.5 kWh

Which generation is the correct one?

Is 23,848 kWh a generation for year 0?

Why do I have a result for 26 years when the observation period is 25 years?

Thank you

 

 

[hotline_oh]

Dear Felix Galan,

Thank you for your inquiry.

Please send us your project file (*.pvprj) to hotline@valentin-software.com so that we can take a closer look at it.