Shading effects produced by wind turbine generators on PV plant production

[Vinh Thinh]

Hi all,

 

I have to run a simulation in PVsyst in order to compute the shadowing impact created by the presence of three wind turbine aerogenerators located within the layout design of an agrivoltaic PV plant. 

To do so, I am well aware of the fact that I can import in the PVsyst tool Near Shading 3D scene a .pvc file (from PVcase) of the layout which can include the 3D shadowing items of the 3 wind turbines with the aim to compute in the simulation the impact of the shadows generated by those turbines with respect to the PV plant producibility. In this regard, I would like to know:

- if the software quantifies such shading losses in the loss diagram under the voice Near Shading Losses. If not, please clarify in which voice they are allocated in the loss diagram

-if there is some kind of way to compute the impact of the shadings generated by the wind turbines in a daily/hourly/monthly formats to understand for example through the year in which periods of time (days, hours) the shading effects is more relevant

Please let me know if there is the need of any additional information that could be helpful to provide an answer to my questions.

Thank you in advance. 

Vinh

[dtarin]

Losses due to specific objects are not isolated. Shading from turbines will be included in both near shadings and electrical loss in the loss diagram. To isolate the turbines run models with and without them, take the delta of shading losses and you can calculate whatever you need. You will also have energy with this, so you can easily calculate overall energy impact monthly, etc. 

[Vinh Thinh]

Thank you for the reply 🙂

Regarding your answer, I would like to have a better understanding on how to apply your procedure in order to visualize and quantify the shadowing impacts of turbines.

First, I get that I shall generate two simulation variants one with and the other without them and from the two loss diagrams see the corresponding near shadings and electrical losses. In order to calculate those losses in MWh, if I understand correctly, I should multiply the energy production values with the near shading and electrical losses expressed in %. Am I right? 

Secondly, in order to calculate the overall energy impact on different timeframe basis (monthly, daily...) I would like to understand if there is a way in PVsyst to extract the production values with respect to such timeframes. Did you have in mind another way to compute and identify those losses ?

 

Thank you.

[dtarin]

export simulations to excel. output the variables you need and analyze from there. 

[Vinh Thinh]

Hi again and thank you for your answer.

I am still trying to figure out if there is a way to analyze the impact through the year of the shadow casting of the wind turbines. Like in my mind this are the steps I would follow:

• get the exported data on hourly basis for a year
• from the loss diagram, taking into account the %loss of near shading loss and electrical shading loss -> is it right? or should I take into account other losses for the shadings of the wind turbines?
• try to find a way to correlate the losses from the loss diagram through the year. Is there a study/methodology? For example, during Winter solstice I would have a bigger impact of shadows, so what fraction of the yearly near shading and electrical shading should I apply? and so through the year, on a monthly basis, how can I find the fraction of those year losses to be applied each month?

 

[Linda Thoren]

Hi,

For hourly estimation of both the production and the specific losses, you can export an Output File with any relevant parameters through the Advanced simulation window. 

From the hourly/daily values generated, you can do any analysis in an external tool such as excel.

[Vinh Thinh]

Hi Linda, how can I extract these data?

[Linda Thoren]

Hi,
you can export an Output File with any relevant parameters through the Advanced simulation window.