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A New Single-Phase Five-Level Self-balanced and Boosting Grid-Connected Switched Capacitor Inverter with LCL Filter

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Sustainable Energy and Technological Advancements

Part of the book series: Advances in Sustainability Science and Technology ((ASST))

Abstract

In this paper, a new single-phase five-level grid-connected switched capacitors (SC) inverter with LCL filter has been presented. It comprises nine unidirectional switches, one discrete diode, one switched capacitor and one DC source. At the end of an inverter output, the LCL filter has been integrated with grid. Basically, the LCL filter provides greater ripple attenuation capability as compared with L and LC filters. Based on parallel-series technique, the topology provides self-balancing property of SC and also gives two times boosting ability with single DC source arrangement. The topology also provides less per unit total standing voltage (TSV) and maintains uniform voltage stress among all semiconductor devices. Before going to grid connection, the level output with RL load case has been checked with proposed universal rounding control scheme (URCS), and it is the modified version of nearest-level control (NLC) technique. In grid-connected case, the dq frame current control strategy and unipolar phase disposition (UPD) pulse width modulation (PWM) techniques have been applied. With step changes in direct axis current reference values, the unity power factor (UPF) operation of grid has been elucidated. Finally, the operation and control strategies with both RL load- and grid-connected cases have been validated through MATLAB/Simulink platform.

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Authors and Affiliations

  1. Electrical Engineering Department, NIT Warangal, Warangal, Telangana, India

    Aratipamula Bhanuchandar & Bhagwan K. Murthy

Authors
  1. Aratipamula Bhanuchandar
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  2. Bhagwan K. Murthy
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Editor information

Editors and Affiliations

  1. Department of Electrical Engineering, National Institute of Technology Meghalaya, Shillong, India

    Gayadhar Panda

  2. School of Electrical and Electronic Engineering, Newcastle University, Singapore, Singapore

    R. T. Naayagi

  3. Department of Electrical Engineering, Indian Institute of Technology Delhi, New Delhi, India

    Sukumar Mishra

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Bhanuchandar, A., Murthy, B.K. (2022). A New Single-Phase Five-Level Self-balanced and Boosting Grid-Connected Switched Capacitor Inverter with LCL Filter. In: Panda, G., Naayagi, R.T., Mishra, S. (eds) Sustainable Energy and Technological Advancements. Advances in Sustainability Science and Technology. Springer, Singapore. https://doi.org/10.1007/978-981-16-9033-4_11

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  • DOI: https://doi.org/10.1007/978-981-16-9033-4_11

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  • Publisher Name: Springer, Singapore

  • Print ISBN: 978-981-16-9032-7

  • Online ISBN: 978-981-16-9033-4

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