Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/34074
Title: Multi-level shunt active power filter using modular cascade H-bridge and delay firing
Authors: Tsang, KM 
Chan, WL 
Tang, X
Issue Date: 2013
Source: Electric power components and systems, 2013, v. 41, no. 6, p. 605-618
Abstract: A novel design of a multi-level shunt active power filter using a modular cascade H-bridge is presented in this article. The proposed approach enables a modular approach in the design of a multi-level active power filter. As an illustration, a five-level H-bridge active power filter with a novel switching strategy has been implemented. The design is able to reduce the voltage stress across the filter inductor and to reduce the average switching frequency. Proportional plus integral controllers have been implemented for the current control loop, overall voltage control loop, and voltage balancing loop. A feedforward controller has also been added to the current control loop to improve the current tracking. By delaying the firing time of one of the H-bridges, five levels can be realized from a cascade H-bridge active power filter. The proposed switching strategy and the realization of the five-level switching scheme are presented. Experimental results are included to demonstrate the effectiveness of the proposed filter scheme.
Keywords: active power filter
delay firing
harmonic
multi-level inverter
switching frequency
Publisher: Taylor & Francis
Journal: Electric power components and systems 
ISSN: 1532-5008
EISSN: 1532-5016
DOI: 10.1080/15325008.2013.763307
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