Voltage harmonic effect of a large-scale solar PV plant on high-voltage transmission network
Year: 2025
Type: article
Abstract: Photovoltaic solar energy is one of the most cost-effective renewable technologies, driving significant global expansion. In Spain, renewable energy policies and environmental awareness have led to a rapid increase in photovoltaic plant installations. However, this growth poses challenges for power quality, particularly due to harmonic emissions that can affect grid stability and efficiency. This study analyses voltage harmonics in a 35 MW photovoltaic solar farm in south-east Spain, comparing harmonic levels before and after commissioning. Statistical analysis of harmonic percentiles and their relative variations reveals specific frequencies with significant deviations, potentially impacting grid stability. A categorisation of harmonics based on their response to the plant's operation is provided, highlighting those with extreme or irregular behaviour. These findings enhance the understanding of the effect of photovoltaic systems on voltage harmonics and offer guidance for mitigating harmonic emissions in future installations.
Source: Electric Power Systems Research
Institution: University of Castilla-La Mancha
Language: English
Topic: Power Quality and Harmonics
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $2,810
OpenAlex ID: W4414521563