TY - JOUR
T1 - Performance comparison of DC and AC controllers for a two-stage power converter in energy storage application
AU - Inga Narváez, Dante
AU - dos Reis, Marcos Vinicios Gomes
AU - Barros, Tárcio André dos Santos
AU - Filho, Ernesto Ruppert
AU - Villalva, Marcelo Gradella
N1 - Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2018/11
Y1 - 2018/11
N2 - This paper presents a procedure for modelling and controlling a single-phase, two-stage, bidirectional DC–AC converter for application of energy storage system (ESS) in autonomous microgrids, in addition to experimental verification of its uninterruptible power supply (UPS) functionality. Average theory and frequency analysis are utilized to model the power converters and design the controllers in a generic fashion. Performance comparison of different controllers (type-2 and type-3 Venable compensators, Proportional Integral, Resonant-PI and multiple-RPI) is realised through simulations and tests. To tune the controllers, parameter values of crossover frequency and phase margin are adjusted by comparing simulation responses of the converters. A 5-kW ESS is evaluated through simulations during normal operation (grid-connected or stand-alone mode), as well as under transition events such as disconnection and recovery of the main grid. Besides that, a 100-W system was implemented, in which grid-connected mode was evaluated by measuring the power factor (about 0.998 in simulation and 0.993 in test at rated power), while stand-alone mode was evaluated by the total harmonic distortion of the output voltage (about 1.57% in simulation and 2.35% in test at rated power). The presented procedure can also be used to design higher power systems.
AB - This paper presents a procedure for modelling and controlling a single-phase, two-stage, bidirectional DC–AC converter for application of energy storage system (ESS) in autonomous microgrids, in addition to experimental verification of its uninterruptible power supply (UPS) functionality. Average theory and frequency analysis are utilized to model the power converters and design the controllers in a generic fashion. Performance comparison of different controllers (type-2 and type-3 Venable compensators, Proportional Integral, Resonant-PI and multiple-RPI) is realised through simulations and tests. To tune the controllers, parameter values of crossover frequency and phase margin are adjusted by comparing simulation responses of the converters. A 5-kW ESS is evaluated through simulations during normal operation (grid-connected or stand-alone mode), as well as under transition events such as disconnection and recovery of the main grid. Besides that, a 100-W system was implemented, in which grid-connected mode was evaluated by measuring the power factor (about 0.998 in simulation and 0.993 in test at rated power), while stand-alone mode was evaluated by the total harmonic distortion of the output voltage (about 1.57% in simulation and 2.35% in test at rated power). The presented procedure can also be used to design higher power systems.
KW - Controller design
KW - Energy storage
KW - Power converter
UR - http://www.scopus.com/inward/record.url?scp=85050798619&partnerID=8YFLogxK
U2 - 10.1016/j.epsr.2018.07.021
DO - 10.1016/j.epsr.2018.07.021
M3 - Article
AN - SCOPUS:85050798619
SN - 0378-7796
VL - 164
SP - 47
EP - 60
JO - Electric Power Systems Research
JF - Electric Power Systems Research
ER -