Optimum inverter sizing of grid-connected photovoltaic systems based on energetic and economic considerations

Wang, Huaxin and Muñoz García, Miguel Angel and Moreda Cantero, Guillermo P. and Alonso Garcia, M. Carmen (2018). Optimum inverter sizing of grid-connected photovoltaic systems based on energetic and economic considerations. "Renewable Energy", v. 118 ; pp. 709-717. ISSN 09601481. https://doi.org/10.1016/j.renene.2017.11.063.

Description

Title: Optimum inverter sizing of grid-connected photovoltaic systems based on energetic and economic considerations
Author/s:
  • Wang, Huaxin
  • Muñoz García, Miguel Angel
  • Moreda Cantero, Guillermo P.
  • Alonso Garcia, M. Carmen
Item Type: Article
Título de Revista/Publicación: Renewable Energy
Date: 2018
ISSN: 09601481
Volume: 118
Subjects:
Faculty: E.T.S. de Ingeniería Agronómica, Alimentaria y de Biosistemas (UPM)
Department: Ingeniería Agroforestal
UPM's Research Group: Técnicas Avanzadas en Agroalimentación LPF-TAGRALIA
Creative Commons Licenses: None

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Abstract

The optimum sizing ratio of the photovoltaic (PV) array capacity, compared to the nominal inverter input capacity, was determined in grid-connected PV (GCPV) systems from two points of view: energetic and economic. The optimum ratio was determined by both empirical and analytical approaches, and based on two PV arrays connected to their inverters, plus three simulated inverters. The flatness of the optimum-energy region due to the inverter characteristics was decreased when economic factors were taken into account. The energetic and economic optimum sizing intervals were defined as the sizing regions causing less than 1% losses from their corresponding optimum points. Subsequently, a compound optimum sizing interval was proposed to maximise the energy injected to the grid and minimise economic costs simultaneously. The results showed that the GCPV system with lower specific DC power generation (kWDC/kWp) and inverter/module cost ratio presented a wider interval (1.12–1.25) than the interval (1.17–1.19) of the system with higher specific DC power generation and cost ratio, for all the analysed inverters. Finally, the optimum sizing ratio was completed by considering a PV module degradation rate of 1%/year, which resulted in a 10% increase in the optimum sizing ratio for a 20-year lifetime.

More information

Item ID: 49108
DC Identifier: http://oa.upm.es/49108/
OAI Identifier: oai:oa.upm.es:49108
DOI: 10.1016/j.renene.2017.11.063
Official URL: https://doi.org/10.1016/j.renene.2017.11.063
Deposited by: Profesor Titular de Universidad (interino) Miguel Angel /M.A. Muñoz-García
Deposited on: 16 Jan 2018 13:46
Last Modified: 19 Apr 2020 22:30
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