A control strategy for a three-level unified power quality conditioner

• Author(s): Monteiro, Luís F. C. ; Costa, José C. C. ; Aredes, Maurício ; Afonso, João L.
• Date: 2005
• Persistent ID: http://hdl.handle.net/1822/4337
• Origin: RepositóriUM - Universidade do Minho
• Subject(s): Active filters; NPC three-level converters; Lagrange multiplier method; Power quality
• Document Type: Conference Object
• Language: English

Description

Comunicação apresentada no 8th COBEP - Congresso Brasileiro de Eletrônica de Potência, Recife, PE, Brasil, 14-17 Julho 2005. In this work a control strategy for a three-level Unified Power Quality Conditioner (UPQC) is introduced. Basically, this control strategy is based on the set of active and non-active (reactive) power definitions in the time domain, which have been proposed by Fryze in the 30´s of the last century. The goal of this work consists in expand this control strategy to deal with three-level converters. The use of three-level converters allows a better performance of the equipment, by reducing harmonics and the ripple of the generated voltages and currents. Simulation results on PSCAD/EMTDC will be illustrated in order to verify the accuracy of the expanded control strategy.