Title :
Selective harmonic elimination and current/voltage control in current/voltage-source topologies: a unified approach
Author :
Espinoza, José R. ; Joós, Géza ; Guzman, Johan I. ; Morán, Luis A. ; Burgos, Rolando P.
Author_Institution :
Dept. de Ingenieria Electrica, Concepcion Univ., Chile
fDate :
2/1/2001 12:00:00 AM
Abstract :
This paper presents a unified approach for generating pulsewidth-modulated patterns for three-phase current-source rectifiers and inverters (CSR/Is) that provides unconstrained selective harmonic elimination and fundamental current control. The approach uses the chopping angles or gating patterns developed for voltage-source rectifiers and inverters in combination with a logic circuit to generate the gating patterns for CSR/Is. The circuit also includes naturally and symmetrically distributed shorting pulses. Thus, the approach avoids the hassle of positioning the shorting pulses and defining and solving a set of nonlinear equations dedicated to CSR/Is. Moreover, the approach can eliminate an even or odd arbitrary number of harmonics (e.g., fundamental current control and elimination of the 5th, 7th, and 11th harmonics). This is an improvement over existing techniques and a new approach to pattern generation. Simulated and experimental results for both static and dynamic operating conditions are presented in order to validate the effectiveness of the approach
Keywords :
electric current control; harmonics suppression; invertors; power conversion harmonics; rectifying circuits; voltage control; 11th harmonics elimination; 5th harmonics elimination; 7th harmonics elimination; chopping angles; current control; gating patterns; logic circuit; naturally distributed shorting pulses; nonlinear equations; selective harmonic elimination; symmetrically distributed shorting pulses; three-phase current-source inverters; three-phase current-source rectifiers; voltage control; voltage-source rectifiers; Current control; Insulated gate bipolar transistors; Power supplies; Pulse generation; Pulse inverters; Pulse width modulation; Rectifiers; Topology; Uninterruptible power systems; Voltage control;
Journal_Title :
Industrial Electronics, IEEE Transactions on