PROGRAMA DE PÓS-GRADUAÇÃO EM ENGENHARIA ELÉTRICA (PPGEE)
UNIVERSIDADE FEDERAL DA PARAÍBA
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Banca de DEFESA: LAMARCK ALVES DA CUNHA
Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE: LAMARCK ALVES DA CUNHA
DATA: 23/11/2022
HORA: 16:00
LOCAL: Videoconferência
TÍTULO: Three different approaches to control a photovoltaic system connected to an unbalanced power grid
PALAVRAS-CHAVES: DSRF, Photovoltaic system, Three phase inverter control, Unbalanced power grid.
PÁGINAS: 120
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Elétrica
RESUMO: This work deals with control for a photovoltaic (PV) system with a three phase inverter
connected to an unbalanced three phase electrical grid. Three control strategies are
proposed based on the Double Synchronous Referential, which uses two structures capable
of independently controlling the positive and negative components of the current injected
into the grid by the PV system. Each one of the strategies tries to act on an electrical
quantity, improving some characteristics of these. Thus, strategy 1 targets eliminate the
negative sequence symmetrical components of the current, and strategies 2 and 3 aim
to mitigate the oscillations of active and reactive powers, respectively. The simulation
model is a power grid composed of 7 buses, which is executed using Matlab/Simulink® as
the simulation software, where the performance of the three strategies is analyzed and
evaluated. The grid is unbalanced due to the uneven distribution of loads between its
phases, and its primary voltages are determined by voltage sags arising from electrical
faults. The results of the simulations are presented, making it possible to observe and
compare the performances of the controls in attenuating the current unbalances and
oscillations in active and reactive power. Besides, a comparison is made between the
strategies using two indices: the unbalance factor of the grid voltages and the electrical line
losses. Through the analysis of the results of these indices, it was determined that strategy
2 reduces voltage unbalances in the grid voltages, and losses are lower when strategy 3 is
applied to the PV system.
MEMBROS DA BANCA:
Interno - 1636976 - FABIANO SALVADORI
Externo ao Programa - 1118165 - FELIPE VIGOLVINO LOPES
Presidente - 1839060 - NADY ROCHA
Externo ao Programa - 1315654 - ROGERIO GASPAR DE ALMEIDA