mikemay

Hello All, In the 8760 output file, I am trying to get the a single string's max current and Voc. When looking at the 8760 output variables, the closest I see are; IArray (Array Current) and UArray (Array Voltage), but the values I am seeing are very high and seems like PVsyst is combining all strings to a combined current and voltage? I have a 32MW DC / 24MW AC system using bifacial modules, defined the system in 12 parallel blocks, where each block is identical with 8 inverters, and each inverter has 18 strings with 28 modules (see attached PVsyst's SLD snip). Can someone comment to see if this is what is happening and how I can get just a single string's max current and open circuit voltage? As a point of context, I am trying to determine the maximum string current (based on the highest 3-hour current average resulting from the simulated local irradiance) as well as, string open circuit voltage (Voc). This is to exercise 690.8(A)(1)(2) in 2017 NEC or later that allows calculating the max current opposed to the typical module Isc x 1.25 Thanks for the help in advance, much appreciated

I created a new orientation, which was a weighted average of the modules within the different azimuths, and then made a new sub-array with the specific modules in a string at the new orientation. In the Near Shade Scene, I had to split up the existing arrays that encompassed the separate azimuths, removed the modules that are now a part of the new orientation, then added the modules at this new orientation within/around the existing arrays. Strings with optimizers (2 x parallel) with an odd number of modules was also an issue, so I made a separate sub-array that with an optimizer (1 x series), and number of optimizers same as the number of modules. Hope this helps.

Hello All, I am new to PVsyst and getting a little more familiarity with modeling and simulation. Having searched the forum and reading Application notes, I've not had much luck and wanted to reach out to gain clarity. The SolarEdge (SE100kUS) system has a string that is not homogenous. Where 11 mods/6 optimizers (P960) on a 190-degree azimuth are connected in the same string with 28 mods/14 optimizers that are on a 181-degree azimuth. From what I can tell, a heterogeneous string is not possible, but I was wondering if anyone has an approach/trick that one could get as close as possible to model this system? Thank you for the help in advance, much appreciated! Kind Regards, Mike