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Auxi Madero

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Posts posted by Auxi Madero

    system unavailability

    in Simulations

    Posted

    23 minutes ago, Robin Vincent said:

    @sarah95 When setting the unavailability factor to default, PVsyst will split the total duration onto 3 separate periods of equal length.

    These periods are randomly selected when you enable the unavailability factor for your different variants the 1st time.

    Thus, two variants using the default (random) unavailability period may end-up with very different unavailability losses.

    If you consider the unavailability of both systems should be the same, you can specify the same date, time and unavailability duration manually.

     

    @Auxi Madero In your variant, detailed losses ==> unavailability you can set a unavailability probability to 5%. With the rest of the settings unchanged, it will generate three random unavailability periods for a total duration of 5% of the whole year. 

    You can find more information in the help page dedicated to the topic : https://www.pvsyst.com/help/index.html?unavailability_loss.htm

    Thanks a lot for your answer.

    So, recapitulating, in the "unavailability time fraction" box I include the percentage of unavailability that the plant has. But isn't it relevant to modify the number of periods? considering that I have no further details beyond 95% availability.

    Thanks again.

    Captura de pantalla 2024-04-24 145734.png

    system unavailability

    in Simulations

    Posted

    3 hours ago, Robin Vincent said:

    Dear sarah95,

    The unavailability figure defined in PVsyst represents the time fraction during which the system won't be able to produce electricity.

    The unavailability losses are not directly linked to the unavailability fraction, but also to when the system is not available (day, night, summer, winter, ...).

    Thus a same unavailability duration can give dissimilar unavailability related losses. 

     

    You can find more details on our help page related to the subject :

    https://www.pvsyst.com/help/index.html?unavailability_loss.htm

     

     

    Hello, and sorry for stepping in.

    I have a question regarding this matter.

    I am not clear about the concept of unavailability for simulations.
    Could you confirm how I need to indicate in the system losses that the current availability provided by a client for the simulation of a site is 95%?

    Thanks in advance.

    Best regards

    How to simulate a site with a mix of new and old modules? Some of them installed for several years with degradation and some new

    in How-to

    Posted

    How to simulate a site in which I have part of the modules installed for 10 years to which I want to apply degradation and part of the modules are new to install now?

    To provide context, I have a site where approximately half of the panels that were installed 10 years ago are going to be replaced with modules of the same Peak Power but a different, more efficient model.
    I want to run a simulation where part of the site has modules that are degraded in year 10 and part of the same site in the simulation has the new modules just installed.
    How could I do this in PVsyst?

    Thanks in advance.

     

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