Energies (Aug 2020)

Control System Development for the Three-Ports ANPC Converter

  • Silvio Antonio Teston,
  • Kaio Vinicius Vilerá,
  • Marcello Mezaroba,
  • Cassiano Rech

DOI
https://doi.org/10.3390/en13153967
Journal volume & issue
Vol. 13, no. 15
p. 3967

Abstract

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This paper proposes a control system for the single-phase Three-Ports Active Neutral- Point-Clamped (ANPC-3P) converter, which can inject a sinusoidal current into the grid, balance the neutral point voltage, and regulate the energy storage system (ESS) current with reduced low-frequency ripple. Despite other applications, ANPC-3P inverter can be used in grid-tied renewable generation to allow the simultaneous connection of a photovoltaic (PV) energy source and an ESS to the AC grid. The ESS is connected directly to the inverter circuit without any auxiliary DC-DC converter, but due to the DC bus pulsed power, it can be subjected to low-frequency current ripple. This undesired current ripple is difficult to filter and can lead to shorter battery life. A control system based on well-known controllers is analyzed and designed. Theoretical analysis is validated experimentally using a single-phase 1-kW prototype.

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