Predictive Control of Grid-Connected Multilevel Inverter with Output LCL Filter

Authors

  • Marek Pastor Technical University of Kosice
  • Jaroslav Dudrik Technical University of Kosice

DOI:

https://doi.org/10.5755/j01.eee.21.3.10033

Keywords:

Active damping, Kalman observer, LCL filter, model predictive control, multilevel inverter.

Abstract

The paper deals with a control of a multilevel grid connected photovoltaic inverter with an LCL output filter. A proposed control technique uses the dynamical model of the LCL filter and ensures inherent active damping of the LCL filter oscillations. The inverter is a one-phase cascade H-bridge inverter with three galvanically separated DC sources and the model predictive control is used as a control technique. A Kalman observer is used to minimize the number of required sensors. Only the grid current and the grid voltage measurements are needed. The model predictive control ensures active damping for the LCL filter. This removes the need for a passive damping of the LCL filter and increases overall system efficiency. The design of the model predictive controller as well as the design of the Kalman observer is presented. The proposed control technique is verified by simulations and measurements on the laboratory model.

DOI: http://dx.doi.org/10.5755/j01.eee.21.3.10033

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Published

2015-06-04

How to Cite

Pastor, M., & Dudrik, J. (2015). Predictive Control of Grid-Connected Multilevel Inverter with Output LCL Filter. Elektronika Ir Elektrotechnika, 21(3), 10-15. https://doi.org/10.5755/j01.eee.21.3.10033

Issue

Vol. 21 No. 3 (2015)

Section

ELECTRICAL ENGINEERING

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