Journal
IEEE ACCESS
Volume 8, Issue -, Pages 226845-226865Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/ACCESS.2020.3044832
Keywords
Power measurement; Uncertainty; Generators; Sports; Soil measurements; Photovoltaic systems; Monitoring; PV power plants; on-site I-V curve measurements; uncertainty method; translation to STC; commissioning; quality assurance; dust and soiling degradation taxes on PV modules
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Funding
- Research and Development Technology Program of electricity sector regulated by the Electrical Energy National Agency (ANEEL)
- Companhia Energetica de Minas Gerais (CEMIG) through the CEMIG-D Projeto [PD0722]
- Pro-Reitoria de Pesquisa (PRPq) da Universidade Federal de Minas Gerais
- Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior/Coordination for the Improvement of Higher Education Personnel (CAPES)
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico/National Council for Scientific and Technological Development (CNPq)
- Fundacao de Amparo a Pesquisa do Estado de Minas Gerais/Research Support Foundation of the State of Minas Gerais (FAPEMIG)
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This research shows the methodology results for outdoor characterization by the I-V curves of the PV power generators at the biggest Brazilian rooftop PV power plant mounted at the Mineirao Football Stadium. The experimental results of the methodology were obtained by a measurement campaign using two capacitive loads. This work identified a significant difference when these measurements were extrapolated to standard test conditions (STC) and compared to the rated power data shown on the PV modules' label at strings: between 24.12% to 26.19% lower. Results showed a contribution of soiling in a power reduction of about 6.7% on average. Additionally, it was considered an uncertain method, and AC electrical parameters were monitored. The reference PV module's calibration was carried out with great attention-the measurements were made with the PV device under test (DUT), guaranteeing the same real operating conditions for the reference PV module and the PV string as DUT. This measurement method has allowed a better characterization of the uncertainty associated with the measurement process. Finally, this study demonstrates the importance of investigating the actual power of the installed PV generators and how these measurements are essential to guaranteeing energy production following the owner's expectations.
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