[{"ddc":["550"],"keyword":["Energy potential estimation","Photovoltaic","Solar radiation","Temperature measurement","Satellite data","Meteonorm","MERRA-2","DWD"],"language":[{"iso":"eng"}],"publication":"Proceedings of the 38th European Photovoltaic Solar Energy Conference and Exhibition (EUPVSEC 2021)","abstract":[{"lang":"eng","text":"Access to precise meteorological data is crucial to be able to plan and install renewable energy systems \r\nsuch as solar power plants and wind farms. In case of solar energy, knowledge of local irradiance and air temperature \r\nvalues is very important. For this, various methods can be used such as installing local weather stations or using \r\nmeteorological data from different organizations such as Meteonorm or official Deutscher Wetterdienst (DWD). An \r\nalternative is to use satellite reanalysis datasets provided by organizations like the National Aeronautics and Space \r\nAdministration (NASA) and European Centre for Medium-Range Weather Forecasts (ECMWF). In this paper the \r\n“Modern-Era Retrospective analysis for Research and Applications” dataset version 2 (MERRA-2) will be presented, \r\nand its performance will be evaluated by comparing it to locally measured datasets provided by Meteonorm and DWD. \r\nThe analysis shows very high correlation between MERRA-2 and local measurements (correlation coefficients of 0.99) \r\nfor monthly global irradiance and air temperature values. The results prove the suitability of MERRA-2 data for \r\napplications requiring long historical data. Moreover, availability of MERRA-2 for the whole world with an acceptable \r\nresolution makes it a very valuable dataset."}],"file":[{"relation":"main_file","success":1,"content_type":"application/pdf","access_level":"closed","file_name":"Khatibi Krauter - MERRA 2 vs Meteonorm - EUPVSEC 2021.pdf","file_id":"29176","file_size":2475972,"date_created":"2022-01-06T13:26:47Z","creator":"krauter","date_updated":"2022-01-06T13:26:47Z"}],"date_created":"2021-09-16T10:20:41Z","title":"Comparison and Validation of Irradiance Data: Satellite Meteorological Dataset MERRA-2 vs. Meteonorm and German Weather Service (DWD)","quality_controlled":"1","year":"2021","_id":"24551","user_id":"28836","department":[{"_id":"53"}],"file_date_updated":"2022-01-06T13:26:47Z","type":"conference","status":"public","date_updated":"2022-01-06T13:29:51Z","author":[{"last_name":"Khatibi","id":"43538","full_name":"Khatibi, Arash","first_name":"Arash"},{"first_name":"Stefan","orcid":"0000-0002-3594-260X","last_name":"Krauter","full_name":"Krauter, Stefan","id":"28836"}],"doi":"10.4229/EUPVSEC20212021-5BV.4.11","conference":{"start_date":"2021-09-06","name":"38th European Photovoltaic Solar Energy Conference and Exhibition (EUPVSEC 2021)","end_date":"2021-09-10"},"publication_status":"published","publication_identifier":{"isbn":["3-936338-78-7"]},"has_accepted_license":"1","citation":{"ama":"Khatibi A, Krauter S. Comparison and Validation of Irradiance Data: Satellite Meteorological Dataset MERRA-2 vs. Meteonorm and German Weather Service (DWD). In: <i>Proceedings of the 38th European Photovoltaic Solar Energy Conference and Exhibition (EUPVSEC 2021)</i>. ; 2021:1141-1147. doi:<a href=\"https://doi.org/10.4229/EUPVSEC20212021-5BV.4.11\">10.4229/EUPVSEC20212021-5BV.4.11</a>","chicago":"Khatibi, Arash, and Stefan Krauter. “Comparison and Validation of Irradiance Data: Satellite Meteorological Dataset MERRA-2 vs. Meteonorm and German Weather Service (DWD).” In <i>Proceedings of the 38th European Photovoltaic Solar Energy Conference and Exhibition (EUPVSEC 2021)</i>, 1141–47, 2021. <a href=\"https://doi.org/10.4229/EUPVSEC20212021-5BV.4.11\">https://doi.org/10.4229/EUPVSEC20212021-5BV.4.11</a>.","ieee":"A. Khatibi and S. Krauter, “Comparison and Validation of Irradiance Data: Satellite Meteorological Dataset MERRA-2 vs. Meteonorm and German Weather Service (DWD),” in <i>Proceedings of the 38th European Photovoltaic Solar Energy Conference and Exhibition (EUPVSEC 2021)</i>, 2021, pp. 1141–1147, doi: <a href=\"https://doi.org/10.4229/EUPVSEC20212021-5BV.4.11\">10.4229/EUPVSEC20212021-5BV.4.11</a>.","apa":"Khatibi, A., &#38; Krauter, S. (2021). Comparison and Validation of Irradiance Data: Satellite Meteorological Dataset MERRA-2 vs. Meteonorm and German Weather Service (DWD). <i>Proceedings of the 38th European Photovoltaic Solar Energy Conference and Exhibition (EUPVSEC 2021)</i>, 1141–1147. <a href=\"https://doi.org/10.4229/EUPVSEC20212021-5BV.4.11\">https://doi.org/10.4229/EUPVSEC20212021-5BV.4.11</a>","mla":"Khatibi, Arash, and Stefan Krauter. “Comparison and Validation of Irradiance Data: Satellite Meteorological Dataset MERRA-2 vs. Meteonorm and German Weather Service (DWD).” <i>Proceedings of the 38th European Photovoltaic Solar Energy Conference and Exhibition (EUPVSEC 2021)</i>, 2021, pp. 1141–47, doi:<a href=\"https://doi.org/10.4229/EUPVSEC20212021-5BV.4.11\">10.4229/EUPVSEC20212021-5BV.4.11</a>.","short":"A. Khatibi, S. Krauter, in: Proceedings of the 38th European Photovoltaic Solar Energy Conference and Exhibition (EUPVSEC 2021), 2021, pp. 1141–1147.","bibtex":"@inproceedings{Khatibi_Krauter_2021, title={Comparison and Validation of Irradiance Data: Satellite Meteorological Dataset MERRA-2 vs. Meteonorm and German Weather Service (DWD)}, DOI={<a href=\"https://doi.org/10.4229/EUPVSEC20212021-5BV.4.11\">10.4229/EUPVSEC20212021-5BV.4.11</a>}, booktitle={Proceedings of the 38th European Photovoltaic Solar Energy Conference and Exhibition (EUPVSEC 2021)}, author={Khatibi, Arash and Krauter, Stefan}, year={2021}, pages={1141–1147} }"},"page":"1141 - 1147"},{"status":"public","type":"conference","file_date_updated":"2022-01-06T13:20:31Z","_id":"24550","department":[{"_id":"53"}],"user_id":"28836","page":"659 - 663","citation":{"ama":"Krauter S, Bendfeld J. Module-Inverters (Microinverters): Influence of Module Size on Conversion Efficiencies and Energy Yields. In: <i>Proceedings of the 38th European Photovoltaic Solar Energy Conference and Exhibition (EU PVSEC 2021)</i>. ; 2021:659-663. doi:<a href=\"https://doi.org/10.4229/EUPVSEC20212021-4CO.3.4\">10.4229/EUPVSEC20212021-4CO.3.4</a>","chicago":"Krauter, Stefan, and Jörg Bendfeld. “Module-Inverters (Microinverters): Influence of Module Size on Conversion Efficiencies and Energy Yields.” In <i>Proceedings of the 38th European Photovoltaic Solar Energy Conference and Exhibition (EU PVSEC 2021)</i>, 659–63, 2021. <a href=\"https://doi.org/10.4229/EUPVSEC20212021-4CO.3.4\">https://doi.org/10.4229/EUPVSEC20212021-4CO.3.4</a>.","ieee":"S. Krauter and J. Bendfeld, “Module-Inverters (Microinverters): Influence of Module Size on Conversion Efficiencies and Energy Yields,” in <i>Proceedings of the 38th European Photovoltaic Solar Energy Conference and Exhibition (EU PVSEC 2021)</i>, 2021, pp. 659–663, doi: <a href=\"https://doi.org/10.4229/EUPVSEC20212021-4CO.3.4\">10.4229/EUPVSEC20212021-4CO.3.4</a>.","apa":"Krauter, S., &#38; Bendfeld, J. (2021). Module-Inverters (Microinverters): Influence of Module Size on Conversion Efficiencies and Energy Yields. <i>Proceedings of the 38th European Photovoltaic Solar Energy Conference and Exhibition (EU PVSEC 2021)</i>, 659–663. <a href=\"https://doi.org/10.4229/EUPVSEC20212021-4CO.3.4\">https://doi.org/10.4229/EUPVSEC20212021-4CO.3.4</a>","short":"S. Krauter, J. Bendfeld, in: Proceedings of the 38th European Photovoltaic Solar Energy Conference and Exhibition (EU PVSEC 2021), 2021, pp. 659–663.","bibtex":"@inproceedings{Krauter_Bendfeld_2021, title={Module-Inverters (Microinverters): Influence of Module Size on Conversion Efficiencies and Energy Yields}, DOI={<a href=\"https://doi.org/10.4229/EUPVSEC20212021-4CO.3.4\">10.4229/EUPVSEC20212021-4CO.3.4</a>}, booktitle={Proceedings of the 38th European Photovoltaic Solar Energy Conference and Exhibition (EU PVSEC 2021)}, author={Krauter, Stefan and Bendfeld, Jörg}, year={2021}, pages={659–663} }","mla":"Krauter, Stefan, and Jörg Bendfeld. “Module-Inverters (Microinverters): Influence of Module Size on Conversion Efficiencies and Energy Yields.” <i>Proceedings of the 38th European Photovoltaic Solar Energy Conference and Exhibition (EU PVSEC 2021)</i>, 2021, pp. 659–63, doi:<a href=\"https://doi.org/10.4229/EUPVSEC20212021-4CO.3.4\">10.4229/EUPVSEC20212021-4CO.3.4</a>."},"has_accepted_license":"1","publication_identifier":{"isbn":["3-936338-78-7"]},"publication_status":"published","doi":"10.4229/EUPVSEC20212021-4CO.3.4","conference":{"start_date":"2021-09-06","name":"38th European Photovoltaic Solar Energy Conference and Exhibition (EUPVSEC 2021)","end_date":"2021-09-10"},"date_updated":"2022-01-06T13:22:03Z","author":[{"first_name":"Stefan","full_name":"Krauter, Stefan","id":"28836","last_name":"Krauter","orcid":"0000-0002-3594-260X"},{"first_name":"Jörg","last_name":"Bendfeld","id":"16148","full_name":"Bendfeld, Jörg"}],"abstract":[{"text":"Efficiencies and energy yields of microinverters available on the market during 2014‒2021 have been \r\nmeasured, compared, and ranked. Conversion efficiencies as a function of load have been measured indoors with high \r\naccuracy and ranked according to Euro- and CEC weightings. Energy yields have been measured outdoors via \r\nidentical and calibrated crystalline silicon PV modules of 215 Wp (until 2020) and 360 Wp (starting 2021). Inverters \r\nwith two inputs have been fed by two of those modules. DC input, AC power output and energy yield of each micro\u0002inverter have been recorded by individual calibrated electricity meters. CEC and EU efficiency rankings have been \r\ncomputed and compared. To assess the influence of PV module size, two extremes have been investigated: A rather \r\nsmall module with 215 Wp - as it has been used 10 years ago, and a brand-new module (2021) offering 360 Wp. Both \r\ntypes of modules contain 60 solar cells in series connection. Appling the low-power modules, the challenge for the \r\ndifferent micro-inverters has been during weak-light conditions, using the high-power modules, some inverters \r\ntemporarily reach their power limits and yield is reduced. A method using a reference configuration of inverter & \r\nmodule and a linear equation y = ax + b resulting in the actual yield, any module & inverter configuration can be \r\ncharacterized by just the coefficients a and b.","lang":"eng"}],"file":[{"date_updated":"2022-01-06T13:20:31Z","creator":"krauter","date_created":"2022-01-06T13:20:31Z","file_size":5413518,"file_name":"Krauter Bendfeld - Module size Microinverters - EUPVSEC 2021.pdf","access_level":"closed","file_id":"29175","content_type":"application/pdf","success":1,"relation":"main_file"}],"publication":"Proceedings of the 38th European Photovoltaic Solar Energy Conference and Exhibition (EU PVSEC 2021)","keyword":["AC-modules","Microinverter","Power Conditioning","Efficiency","Yield","PV module size","saturation","performance"],"ddc":["620"],"language":[{"iso":"eng"}],"year":"2021","quality_controlled":"1","title":"Module-Inverters (Microinverters): Influence of Module Size on Conversion Efficiencies and Energy Yields","date_created":"2021-09-16T10:17:11Z"},{"department":[{"_id":"53"}],"user_id":"16148","_id":"24540","file_date_updated":"2022-01-06T13:11:59Z","language":[{"iso":"eng"}],"keyword":["Art-D","Afrika","Demand side management","MySQL","Raspberry pi","Data acquisition"],"ddc":["620"],"publication":"Proceedings of the 38th European Photovoltaic Solar Energy Conference and Exhibition (EUPVSEC 2021)","type":"conference","status":"public","file":[{"relation":"main_file","success":1,"content_type":"application/pdf","file_id":"29174","access_level":"closed","file_name":"Kakande Philipo Krauter - Load Data Aquisition ART-D - EUPVSEC 2021.pdf","file_size":1343406,"date_created":"2022-01-06T13:11:59Z","creator":"krauter","date_updated":"2022-01-06T13:11:59Z"}],"abstract":[{"text":"With its growing population and industrialization, DREs, and solar technologies in particular, provide a \r\nsustainable means of bridging the current energy deficit in Africa, increasing supply reliability and meeting future \r\ndemand. Data acquisition and data management systems allow real time monitoring and control of energy systems as \r\nwell as performance analysis. However commercial data acquisition systems often have cost implications that are \r\nprohibitive for small PV systems and installations in developing countries.\r\nIn this paper, a multi-user, multi-purpose microgrid database system is designed and implemented. MAVOWATT \r\n270 power quality analyzers by GOSSEN METRAWATT, raspberry pi modules and sensors are used for measuring, \r\nrecording and storing electrical and meteorological data in East Africa. Socio-economic data is also stored in the\r\ndatabase. The designed system employs open source software and hardware solutions which are best suited to \r\ndeveloping regions like East Africa due to the lower cost implications.\r\nThe expected results promise a comprehensive database covering different electro-technical and socio-economic \r\nparameters useful for optimal design of microgrid systems.","lang":"eng"}],"author":[{"id":"88649","full_name":"Kakande, Josephine Nakato","last_name":"Kakande","first_name":"Josephine Nakato"},{"full_name":"Philipo, Godiana Hagile","id":"88505","last_name":"Philipo","first_name":"Godiana Hagile"},{"first_name":"Stefan","orcid":"0000-0002-3594-260X","last_name":"Krauter","full_name":"Krauter, Stefan","id":"28836"}],"date_created":"2021-09-16T05:52:50Z","date_updated":"2024-10-17T08:45:50Z","conference":{"name":"38th European Photovoltaic Solar Energy Conference and Exhibition (EUPVSEC 2021)","start_date":"2021-09-06","end_date":"2021-09-10"},"doi":"10.4229/EUPVSEC20212021-6BV.5.38","title":"Load Data Acquisition in Rural East Africa for the Layout of Microgrids and Demand–Side–Management Measures","quality_controlled":"1","publication_identifier":{"isbn":["3-936338-78-7"]},"has_accepted_license":"1","publication_status":"published","page":"1505-1510","citation":{"apa":"Kakande, J. N., Philipo, G. H., &#38; Krauter, S. (2021). Load Data Acquisition in Rural East Africa for the Layout of Microgrids and Demand–Side–Management Measures. <i>Proceedings of the 38th European Photovoltaic Solar Energy Conference and Exhibition (EUPVSEC 2021)</i>, 1505–1510. <a href=\"https://doi.org/10.4229/EUPVSEC20212021-6BV.5.38\">https://doi.org/10.4229/EUPVSEC20212021-6BV.5.38</a>","short":"J.N. Kakande, G.H. Philipo, S. Krauter, in: Proceedings of the 38th European Photovoltaic Solar Energy Conference and Exhibition (EUPVSEC 2021), 2021, pp. 1505–1510.","mla":"Kakande, Josephine Nakato, et al. “Load Data Acquisition in Rural East Africa for the Layout of Microgrids and Demand–Side–Management Measures.” <i>Proceedings of the 38th European Photovoltaic Solar Energy Conference and Exhibition (EUPVSEC 2021)</i>, 2021, pp. 1505–10, doi:<a href=\"https://doi.org/10.4229/EUPVSEC20212021-6BV.5.38\">10.4229/EUPVSEC20212021-6BV.5.38</a>.","bibtex":"@inproceedings{Kakande_Philipo_Krauter_2021, title={Load Data Acquisition in Rural East Africa for the Layout of Microgrids and Demand–Side–Management Measures}, DOI={<a href=\"https://doi.org/10.4229/EUPVSEC20212021-6BV.5.38\">10.4229/EUPVSEC20212021-6BV.5.38</a>}, booktitle={Proceedings of the 38th European Photovoltaic Solar Energy Conference and Exhibition (EUPVSEC 2021)}, author={Kakande, Josephine Nakato and Philipo, Godiana Hagile and Krauter, Stefan}, year={2021}, pages={1505–1510} }","ama":"Kakande JN, Philipo GH, Krauter S. Load Data Acquisition in Rural East Africa for the Layout of Microgrids and Demand–Side–Management Measures. In: <i>Proceedings of the 38th European Photovoltaic Solar Energy Conference and Exhibition (EUPVSEC 2021)</i>. ; 2021:1505-1510. doi:<a href=\"https://doi.org/10.4229/EUPVSEC20212021-6BV.5.38\">10.4229/EUPVSEC20212021-6BV.5.38</a>","chicago":"Kakande, Josephine Nakato, Godiana Hagile Philipo, and Stefan Krauter. “Load Data Acquisition in Rural East Africa for the Layout of Microgrids and Demand–Side–Management Measures.” In <i>Proceedings of the 38th European Photovoltaic Solar Energy Conference and Exhibition (EUPVSEC 2021)</i>, 1505–10, 2021. <a href=\"https://doi.org/10.4229/EUPVSEC20212021-6BV.5.38\">https://doi.org/10.4229/EUPVSEC20212021-6BV.5.38</a>.","ieee":"J. N. Kakande, G. H. Philipo, and S. Krauter, “Load Data Acquisition in Rural East Africa for the Layout of Microgrids and Demand–Side–Management Measures,” in <i>Proceedings of the 38th European Photovoltaic Solar Energy Conference and Exhibition (EUPVSEC 2021)</i>, 2021, pp. 1505–1510, doi: <a href=\"https://doi.org/10.4229/EUPVSEC20212021-6BV.5.38\">10.4229/EUPVSEC20212021-6BV.5.38</a>."},"year":"2021"}]