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Diode-clamped three level inverter based battery/supercapacitor direct integration scheme for renewable energy systems

journal contribution
posted on 2023-05-18, 10:58 authored by Shantha Jayasinghe ArachchillageShantha Jayasinghe Arachchillage, Vilathgamuwa, DM, Madawala, UK
This paper describes a diode-clamped three-level inverter-based battery/supercapacitor direct integration scheme for renewable energy systems. The study is carried out for three different cases. In the first case, one of the two dc-link capacitors of the inverter is replaced by a battery bank and the other by a supercapacitor bank. In the second case, dc-link capacitors are replaced by two battery banks. In the third case, ordinary dc-link capacitors are replaced by two supercapacitor banks. The first system is supposed to mitigate both long-term and short-term power fluctuations while the last two systems are intended for smoothening long-term and short-term power fluctuations, respectively. These topologies eliminate the need for interfacing dc–dc converters and thus considerably improve the overall system efficiency. Themajor issue in aforementioned systems is the unavoidable imbalance in dc-link voltages. An analysis on the effects of unbalance and a space vector modulation method, which can produce undistorted current even in the presence of such unbalances, are presented in this paper. Furthermore, small vector selection-based power sharing and state of charge balancing techniques are proposed. Experimental results, obtained froma laboratory prototype, are presented to verify the efficacy of the proposed modulation and control techniques.


Publication title

IEEE Transactions on Power Electronics










Australian Maritime College


Ieee-Inst Electrical Electronics Engineers Inc

Place of publication

445 Hoes Lane, Piscataway, USA, Nj, 08855

Rights statement

Copyright 2011 IEEE

Repository Status

  • Restricted

Socio-economic Objectives

Wind energy