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| Thu, 4th Jun 2020 16:23:00 |
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Choosing representative strings for measuring power loss |
Analyzing monitoring data does not always accurately identify under-performing assets; and when investigating supposed power loss with IV-curve measurements, a representative sample via thermography should be selected. These are two conclusions drawn from a case study, which will be discussed during the upcoming asset management session at the pv magazine virtual roundtable Europe 2020.
The first time Lucie Garreau-Iles visited the location where the solar plant she was to investigate was installed, framed with willowy grasses 1.5 meters high, it probably had the romantic impact that many tourists love so much when traveling in the Mediterranean region.
As enchanting as it probably was, it was also one of the reasons why the analysis of the monitoring data originating from the 3.5 MW solar plant wasn't leading anywhere.
Garreau-Iles works as Technical Regional Manager at DuPont Photovoltaic Solutions in a team which investigates the health of solar plants. For this mission, she needed to investigate whether the yield of the eight-year-old installation could be improved.
From the monitoring data, it was even difficult to judge whether the plant had a yield problem, because the weather sensors were also intermittently failing; meanwhile, there was no data for the first two years of operation, and missing or invalid data thereafter. This may not have been relevant to the investor, however, since high feed-in-tariffs secured enough revenue.
Read original full article
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