Skip to content
Journal article

A transformerless battery energy storage system based on a multilevel cascade PWM converter

Maharjan L, Inoue S, Akagi H, Asakura J ...see all

2008 IEEE Power Electronics Specialists Conference, vol. 44, issue 5 (2008) pp. 1621-1630

  • 2

    Readers

    Mendeley users who have this article in their library.
  • N/A

    Citations

    Citations of this article.
  • N/A

    Views

    ScienceDirect users who have downloaded this article.
Sign in to save reference

Abstract

Renewable energy sources such as wind turbine generators and photovoltaics produce a fluctuating electric power. A battery energy storage system (BESS) should be installed in the vicinity of these sources. The fluctuating power is compensated by appropriately controlling an active power stored in the battery. This paper describes a feasible circuit configuration of a 6.6-kV transformerless battery energy storage system based on a multilevel cascade PWM (pulse-width-modulation) converter, with focus on a control method for active power and SOC (state-of- charge) balancing. A 200-V, 10-kW, 3.6-kWh (13-MJ) laboratory system combining a multilevel cascade PWM converter with nine NiMH (nickel metal hydride) battery units is designed, constructed, and tested to verify the viability and effectiveness of the 6.6-kV system.

Author-supplied keywords

  • Active-power control
  • BESS (battery energy storage system)
  • NiMH (Nickel Metal Hydride) battery
  • SOC (state-of-charge) balancing
  • cascade converters

Authors

  • L. Maharjan

  • S. Inoue

  • H. Akagi

  • J. Asakura

Cite this document

Choose a citation style from the tabs below