Development of laboratory prototype of a 12kVA digital shunt active filter

The paper reports the development of a laboratory prototype of a fully digital DSP controlled 12 kVA shunt active filter (ShAF) capable of compensating for non-linear, unbalanced load and reactive power. A fully digital controller is implemented for the reference generation and the current control p...

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Bibliographic Details
Main Authors: Jayanti, N.G., Basu, M., Axente, I., Gaughan, K., Conlon, M.F.
Format: Conference Proceeding
Language:English
Subjects:
Active filters
Application software
Current control
Delay
Digital control
Digital signal processing
Laboratories
Phase locked loops
Prototypes
Reactive power control
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Summary:The paper reports the development of a laboratory prototype of a fully digital DSP controlled 12 kVA shunt active filter (ShAF) capable of compensating for non-linear, unbalanced load and reactive power. A fully digital controller is implemented for the reference generation and the current control purposes. The delay problem in digital current controller is overcome by application of a fast DSP, a compact controller and proper flow of control steps in the DSP software. A phase locked loop (PLL)-less software grid synchronization method has been proposed for the effective operation of the ShAF under the grid frequency variation. The source current THD has been improved from 15.8% to 4.45%. The control features, experimental setup, and results are presented in the paper.
ISSN:1553-572X
DOI:10.1109/IECON.2008.4758461