Title: Model-based generation of low distortion currents in grid-coupled PWM-Inverters using an LCL output filter
Authors: Bolsens, Bruno ×
De Brabandere, Karel
Van den Keybus, Jeroen
Driesen, Johan
Belmans, Ronnie #
Issue Date: Jul-2006
Series Title: IEEE Transactions on Power Electronics vol:21 issue:4 pages:1032-1040
Abstract: In this paper, a single phase inductance-capacitance-inductance (LCL) output stage for grid coupled inverters is designed and built. An accurate model and observer of the output filter and the distorted grid voltage are implemented. The paper deals with the construction of a 14-state model, and the feedback control loop to obtain adequate closed loop response. Simulations indicate a good performance of the controller, with a total harmonic current distortion (THD) below 1%. Experimental results confirm simulations, and illustrate the correct operation of the Kalman observer to estimate the distorted grid voltage (THD 3%). The observer only uses the inverter current measurement as input. The output filter effectively reduces the pulsewidth modulation harmonics in the grid current.
ISSN: 0885-8993
Publication status: published
KU Leuven publication type: IT
Appears in Collections:ESAT - ELECTA, Electrical Energy Computer Architectures
× corresponding author
# (joint) last author

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