10 documents found, page 1 of 1
Short-term electricity prices forecasting in a competitive market by a hybrid P...
Catalao, J. P. S.; Pousinho, H. M. I.; Mendes, V. M. F.In this paper, a novel hybrid approach is proposed for electricity prices forecasting in a competitive market, considering a time horizon of one week. The proposed approach is based on the combination of particle swarm optimization and adaptive-network based fuzzy inference system. Results from a case study based on the electricity market of mainland Spain are presented. A thorough comparison is carried out, ta...
Simulation of a-Si PV system grid connected by boost and inverter
Fialho, L.; Melício, R.; Mendes, V. M. F.; Estanqueiro, AnaThis paper is about a PV system connected to the electric grid by power electronic converters, using classical PI controller. The modelling for the converters emulates the association of a DC-DC boost with a two-level power inverter (TwLI) or three-level power inverter (ThLI) in order to follow the performance of a testing experimental system. Pulse width modulation (PWMo) by sliding mode control (SMCo) associa...
PV systems linked to the grid: parameter identification with a heuristic procedure
Fialho, L.; Melício, R.; Mendes, V. M. F.; Estanqueiro, Ana; Pereira, Manuel CollaresThis paper focuses on a PV system linked to the electric grid by power electronic converters, identification of the five parameters modeling for photovoltaic systems and the assessment of the shading effect. Normally, the technical information for photovoltaic panels is too restricted to identify the five parameters. An undemanding heuristic method is used to find the five parameters for photovoltaic systems, r...
Simulation of OWES with five-Level converter linked to the grid: Harmonic asses...
Seixas, Mafalda; Melício, R.; Mendes, V. M. F.; Couto, CarlosThis paper deals with a computing simulation for an offshore wind energy system taking into account the influence of the marine waves action throughout the floating platform. The wind energy system has a variable-speed turbine equipped with a permanent magnet synchronous generator and a full-power five level converter, injecting energy into the electric grid through a high voltage alternate current link. A redu...
Simulation of a rectifier malfunction on a offshore wind system with HVDC trans...
Seixas, Mafalda; Melício, R.; Mendes, V. M. F.; Couto, CarlosA new integrated mathematical model for the simulation of an offshore wind system having a rectifier input voltage malfunction at one phase is presented in this paper. The mathematical model considers an offshore variable-speed wind turbine on a floating platform, equipped with a permanent magnet synchronous generator using full-power three-level converter to inject energy into the electric network, through a h...
Simulation of a-Si PV system grid connected by boost and inverter
Fialho, L.; Melício, R.; Mendes, V. M. F.; Estanqueiro, AnaThis paper is about a PV system connected to the electric grid by power electronic converters, using classical PI controller. The modelling for the converters emulates the association of a DC-DC boost with a two-level power inverter (TwLI) or three-level power inverter (ThLI) in order to follow the performance of a testing experimental system. Pulse width modulation (PWMo) by sliding mode control (SMCo) associa...
PV systems linked to the grid: parameter identification with a heuristic procedure
Fialho, L.; Melício, R.; Mendes, V. M. F.; Estanqueiro, Ana; Pereira, Manuel CollaresThis paper focuses on a PV system linked to the electric grid by power electronic converters, identification of the five parameters modeling for photovoltaic systems and the assessment of the shading effect. Normally, the technical information for photovoltaic panels is too restricted to identify the five parameters. An undemanding heuristic method is used to find the five parameters for photovoltaic systems, r...
A simulation of integrated photovoltaic conversion into electric grid
Fialho, L.; Melício, R.; Mendes, V. M. F.; Viana, Susana; Rodrigues, Carlos; Estanqueiro, AnaThis paper presents a systemic modeling for a PV system integrated into an electric grid. The modeling includes models for a DC–DC boost converter and a DC–AC two-level inverter. Classical or fuzzy PI controllers with pulse width modulation by space vector modulation associated with sliding mode control is used for controlling the PV system and power factor control is introduced at the output of the system. Com...
PV system with maximum power point tracking: modeling, simulation and experimen...
Pereira, R.; Melício, R.; Mendes, V. M. F.; Joyce, AThis paper focuses on the five parameters modeling, consisting on a current controlled generator, single-diode, a shunt and series resistances. Also, a simulation, identification of the parameters for a photovoltaic system and the maximum power point tracking based on VP„g„g is presented. The identification of parameters and the performance of the equivalent circuit model for a solar module simulation are valid...
PV system with maximum power point tracking: modeling, simulation and experimen...
Pereira, R.; Melício, R.; Mendes, V. M. F.; Joyce, AThis paper focuses on the five parameters modeling, consisting on a current controlled generator, single-diode, a shunt and series resistances. Also, a simulation, identification of the parameters for a photovoltaic system and the maximum power point tracking based on VP„g„g is presented. The identification of parameters and the performance of the equivalent circuit model for a solar module simulation are valid...