Performance of PV systems in Slovenia with the help of typical daily profiles and automatic detection of orientation and inclination angles

Brecl, Kristijan (author), Ascencio Vásquez, Julián Andrés (author), Topič, Marko (author)

Operators of photovoltaic (PV) systems, especially the small ones, monitor only the produced energy output, since they are not equipped with a meteorological station, or there is none in the neighbourhood. When evaluating a large number of PV systems across a region or country, access to the data due to privacy restrictions is usually very limited. To resolve both aspects, we report on a methodology to evaluate the performance of photovoltaic systems where only produced energy data and rated power of the PV system are available and all other data, including orientation and inclination angles, and the exact location are missing. We developed a novel algorithm for automatic detection of orientation/inclination angles and used the recently developed Typical Daily Profiles (TDP) methodology for a fast and accurate evaluation of PV systems. TDPs are representative hourly profiles of the observed parameter (e.g., power, irradiance and temperature) on a monthly basis. For the PV system degradation rate extraction, year-to-year TDPs are used. The case study of 957 PV systems in Slovenia in the period 2015–2019 reveals an average PV system performance ratio exceeding 85% and an average PV system rated power degradation rate of −0.7% per year.

• Language: English
• Keywords: PV systems, orientation/inclination angle detection, typical daily profiles, performance, degradation rate
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FE - Faculty of Electrical Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2022
• Number of pages: Str. 870-878
• Numbering: Vol. 236
• PID: 20.500.12556/RUL-135976-76a79876-4660-d419-f20d-2764da8dd55c
• UDC: 621.383.51
• ISSN on article: 0038-092X
• DOI: 10.1016/j.solener.2022.03.059
• COBISS.SI-ID: 103239171
• Publication date in RUL: 05.04.2022

Record is a part of a journal

• Title: Solar energy
• Shortened title: Sol. energy
• Publisher: Elsevier, International Solar Energy Society
• ISSN: 0038-092X
• COBISS.SI-ID: 5228039

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.

Secondary language

• Language: Slovenian
• Keywords: PV sistemi, detekcija orientacije in naklona modulov, tipični dnevni profili, učinkovitost, degradacija

Projects

• Funder: ARRS - Slovenian Research Agency
• Project number: P2-0415
• Name: Fotovoltaika in elektronika