Implementation of a Photovoltaic Inverter with Modified Automatic Voltage Regulator Control Designed to Mitigate Momentary Voltage Dip

Anderson Rodrigo Piccini, Geraldo Caixeta Guimarães, Arthur Costa de Souza and Ana Maria Denardi
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Anderson Rodrigo Piccini: Faculty of Electrical Engineering, Federal University of Uberlandia (UFU), Uberlandia 38400-902, MG, Brazil
Geraldo Caixeta Guimarães: Faculty of Electrical Engineering, Federal University of Uberlandia (UFU), Uberlandia 38400-902, MG, Brazil
Arthur Costa de Souza: Federal University of Itajubá (UNIFEI), Campus Itabira, Itabira 35903-087, MG, Brazil
Ana Maria Denardi: Federal Institute of Education, Science and Technology of Paraná (IFPR), Paranavaí 87703-536, PR, Brazil

Energies, 2021, vol. 14, issue 19, 1-22

Abstract: The main objective of this research is to propose an active and reactive power injection control in order to mitigate voltage sags. The proposed control strategy works in conjunction with a modified version of an automatic voltage regulator (AVR), where it will act on the active and reactive powers injected by the inverter to reduce the effects of voltage sags. In this way, the control will avoid possible shutdowns and damage to the equipment connected to the grid. The voltage improvement can be perceived for consumers connected to the power system. Modifications in AVR model and parameters are performed to speed up its performance, thus identifying the short-duration voltage variations (SDVV) and, consequently, the control acts to alter the powers, decreasing the active power injection and increasing the reactive power based on inverter capacity during the momentary voltage dip (MVD). Finally, when the fault is cleared, all values return to the pre-fault condition, so that the inverter only operates with active power. A 75 kW three-phase grid-connected photovoltaic system (GCPVS) equipped with the proposed control was inserted in a distribution grid of the city of Palmas, state of Tocantins, Brazil, and all of the computer simulations were performed on the Matlab/Simulink ® .

Keywords: distributed generation; grid-connected photovoltaic system; momentary voltage dip; reactive power; short-duration voltage variation (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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