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Debora Pereira Damasceno
Faculdade de Engenharia Elétrica e de Computação Universidade Estadual de Campinas (UNICAMP), Campinas - SP
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Mateus Pinheiro Dias
Faculdade de Engenharia Elétrica e de Computação Universidade Estadual de Campinas (UNICAMP), Campinas - SP
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João I. Y. Ota
Faculdade de Engenharia Elétrica e de Computação Universidade Estadual de Campinas (UNICAMP), Campinas - SP
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José Antenor Pomilio
Faculdade de Engenharia Elétrica e de Computação Universidade Estadual de Campinas (UNICAMP), Campinas - SP
Keywords:
Bipolar dc microgrid, dc-dc converter, Neutral line current, Voltage unbalance
Abstract
This paper presents an analysis of the balancing voltage of a bipolar dc microgrid (±190 V) formed by a four-wire three-phase bidirectional PWM rectifier. The rectifier is responsible for guaranteeing the total dc bus voltage (380 V). The balancing of symmetrical voltages is guarranteed by a Cuk voltage-balancing converter that acts equalizing the voltages in case of unbalanced loads. DC-DC converters are connected to the dc buses and aims to adjust the voltage levels for residential or commercial applications. The simulation results show that a voltage balancer is essential to keep the voltage balance of the dc microgrid.