Modeling of Single-Phase Photovoltaic Generators for System-Wide Harmonic Power Flow Studies

Author(s)

Arguello, Andres ; Torquato, Ricardo ; Rosado, Barbara ; Freitas, Walmir

• Document type: Journal article
• Source: IEEE Transactions on Energy Conversion; v. 38, n. 2, p. 13-pg., 2023-06-01.

Abstract

An important power quality concern of integrating single-phase photovoltaic (PV) generators to low-voltage (LV) residential systems, is their impact on harmonic distortions due to their power electronic-based interface through a voltage source converter (VSC). Unfortunately, most existing single-phase PV models are focused on the analysis of an individual device, and do not provide a modular circuit model that can be directly integrated into a commercial harmonic power flow simulation tool for large-scale power system studies. In response, this paper derives a single-input single-output harmonic model for single-phase PVs that is independent of grid parameters, thus enabling multiple of these devices to be considered simultaneously in system-wide harmonic power flow analyses. The model is validated with electromagnetic transient simulations and then, characterization studies are conducted to determine the expected harmonic impact of these PV generators on a real LV system. Results demonstrate these devices can increase system damping at typical low order harmonics and are unlikely to introduce new resonances at this frequency range. In addition, it is essential to model the VSC controller effect for a more accurate assessment of its harmonic impact. Sensitivity studies reveal how different VSC parameters affect this behavior. (AU)

• FAPESP's process: 16/08645-9 - Interdisciplinary research activities in electric smart grids
• Grantee: João Bosco Ribeiro do Val
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 20/10043-2 - Data Analytics for Condition Monitoring in Modern Electric Power Distribution Systems
• Grantee: Bárbara Resende Rosado
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 18/24018-0 - Methodologies for the Integration of High-Resolution Measurements on Management of Modern Power Distribution Systems
• Grantee: Ricardo Torquato Borges
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 21/11380-5 - CPTEn - São Paulo Center for the Study of Energy Transition
• Grantee: Luiz Carlos Pereira da Silva
• Support Opportunities: Research Grants - Science Centers for Development