Aidas Posted June 26 Report Posted June 26 Hello, I've got daily solar radiation measurements (W/m2) from local meteo station. https://ibb.co/LR8YnXj After comparing kWh/m²a data between PVSOL provided data and meassured values, i get 10-14% more radiation. https://ibb.co/K21BBgT https://ibb.co/FwsMsLK https://ibb.co/ZL8L8Yh Does PVSOL uses old data or im doing something wrong by entering data? I calculate average month W/m2 value before entering to PVSOL or is it possible to enter daily data? https://ibb.co/7njr8wH PVSOL presentation with measured values gives me 1261,8 kWh/kWp what is unreal in my country. According to https://meteonorm.com/en/demo-files-maps Europe - Yearly sum of global horizontal irradiation (1996–2015) i should get about 1000-1050 kWh/m2. Please help! Stoties apsvitos duomenys Aido.xlsx 500 kW saulės elektrinė Vinkšnėnų k., 9103-0013-0035 (540W) stoties duomenys.pvprj Quote
developer_mo Posted July 17 Report Posted July 17 Hello Aidas, thanks for your contribution and sorry for my late reply. On 6/26/2024 at 4:32 PM, Aidas said: Does PVSOL uses old data or im doing something wrong by entering data? I calculate average month W/m2 value before entering to PVSOL or is it possible to enter daily data? PVSOL uses the latest available long-term data from various climate data providers for the respective location. Your input appears correct but refers to a short period of time, compared to the Meteonorm data. Daily data cannot be entered. Only the average daily radiation of the month (in Wh/m²) or the sum the radiation of all days of a month (in kWh/m²). The global radiation and the annual yield cannot be compared directly. Since the question relates to the appropriateness of the global radiation, I will only refer to the global radiation values. I created a new location for Vinkšnėnų with Meteonorm and got 1025 w/m2 for annual sum of global radiation. The deviation from the measurement data you entered is then plausible at approx. 70 W/m² (approx. 10 percent), since the Metonorm data contains almost 20 years and the period you entered is much shorter. For this reason, I would recommend creating a self-generated location based on Meteonorm for the simulation. You can find a description of how to do this in our online help: https://help.valentin-software.com/pvsol/en/pages/system-type-climate-and-grid/meteosyn/#create-new-location I hope this helps. Kind regards Mikio Quote
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