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Article
Control of a Three-Phase Inverter under Unbalanced Grid Conditions
Proceedings of the 9th Annual IEEE Energy Conversion Congress and Exposition (2017, Cincinnati, OH)
  • Vikram Roy Chowdhury
  • Subhajyoti Mukherjee
  • Pourya Shamsi, Missouri University of Science and Technology
  • Mehdi Ferdowsi, Missouri University of Science and Technology
Abstract

A control strategy for a three-phase grid connected inverter with LCL filter based on Lyapunov energy function during unbalanced grid conditions is presented in this paper. To reduce complexity and number of variables the control strategy is accomplished in a stationary two phase reference frame. Dual second-order generalized integrator structure (DSOGI) is utilized to extract the positive and negative sequence components of voltages and currents for unbalanced operation. A virtual resistor based active damping methodology based on indirect capacitor current feedback is employed to nullify the resonance oscillations due to the third order (LCL) filter. By using Lyapunov energy function based control, a direct grid current control architecture is achieved at the desired power factor.

Meeting Name
9th Annual IEEE Energy Conversion Congress and Exposition (2017: Oct. 1-5, Cincinnati, OH)
Department(s)
Electrical and Computer Engineering
Research Center/Lab(s)
Intelligent Systems Center
Keywords and Phrases
  • Electric Current Control,
  • Electric Inverters,
  • Energy Conversion,
  • 3-Phase Inverter,
  • Capacitor Current Feedback,
  • LCL Filters,
  • Lyapunov Energy Functions,
  • Negative Sequence Components,
  • Second-Order Generalized Integrators,
  • Three-Phase Grid Connected Inverters,
  • Unbalanced Grid,
  • Electric Power System Control,
  • LCL Filter,
  • Lyapunov Energy Function,
  • Current Control
International Standard Book Number (ISBN)
978-1509029983; 978-1509029990
Document Type
Article - Conference proceedings
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2017 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.
Publication Date
10-1-2017
Publication Date
01 Oct 2017
Citation Information
Vikram Roy Chowdhury, Subhajyoti Mukherjee, Pourya Shamsi and Mehdi Ferdowsi. "Control of a Three-Phase Inverter under Unbalanced Grid Conditions" Proceedings of the 9th Annual IEEE Energy Conversion Congress and Exposition (2017, Cincinnati, OH) Vol. 2017-January (2017) p. 2909 - 2913
Available at: http://works.bepress.com/pourya-shamsi/20/