Estudo e implementação de um controle de corrente para conversores em matriz e inversores fonte de tensão sem capacitor no elo de corrente contínua

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Author(s):	Milton Evangelista de Oliveira Filho Total Authors: 1
Document type:	Doctoral Thesis
Press:	Campinas, SP.
Institution:	Universidade Estadual de Campinas (UNICAMP). Faculdade de Engenharia Elétrica e de Computação
Defense date:	2010-11-17
Examining board members:	Ernesto Ruppert Filho; Angelo Jose Junqueira Rezek; Ricardo Quadros Machado; Luiz Carlos Pereira da Silva; Elnatan Chagas Ferreira
Advisor:	Ernesto Ruppert Filho
Abstract
This thesis concern a current control method for three-phase matrix converter and three-phase voltage source inverter without a dc link capacitor in order to mitigate and compensate the distortions present in the output voltages so that the output currents are sinosoidal. In these converters, because of lack of large storage elements, imbalances and/or distortions present in the input voltage will be immediately reflected to the converter output voltages. The proposed current control model forces the magnitude of the output space vector current to be constant through a PI controller that dynamically alters the duty cycle of the power converter switching for compensating the imbalances and distortions from input voltages. The performance of this current control is validated by simulations implemented in Matlab and experimental results on the prototype of a voltage source inverter without a DC link capacitor feeding a three-phase RL load (AU)