Reduced switching frequency active front end converter for medium voltage current-source drives using space vector modulation

E. P. Wiechmann, R. P. Burgos, J. R. Rodriguez

Resultado de la investigación: Contribución a los tipos de informe/libroContribución a la conferenciarevisión exhaustiva

7 Citas (Scopus)

Resumen

This paper proposes an active front end (AFE) converter for medium voltage current source drives. The converter comprises a 12-pulse isolation transformer and two PWM current source rectifiers (CSR) with GTO thyristors. The converter operates with a switching frequency of 100 Hz (2 p.u.), thus reduces its commutation losses by 66% compared to previous PWM approaches. Also, the converter independently controls its active and reactive power flow, thus being able to operate as a Var compensator to the power system. Under this scheme, unity power factor is achieved by setting the reactive power reference to zero. The converter's control system is built over an inner d-q axes synchronous frame current loop, and a dc link current and reactive power outer loops to control the d and q axes respectively. Linear controllers are used in all loops but in the dc link. A nonlinear controller is employed to linearize this loop, hence avoiding instabilities during regenerative operation. All these features were achieved using staggered sampling space vector modulation (SVM), which assures harmonic cancellation between both PWM-CSR through the feeding transformer. Moreover, the use of SVM avoids all complications associated to selective harmonic elimination techniques (usually employed in these converters). Specifically, solving nonlinear equations and distributing shorting pulses. Simulation results obtained under different operating conditions validate the proposed AFE converter for medium voltage current source drives.

Idioma originalInglés
Título de la publicación alojadaIEEE International Symposium on Industrial Electronics
Páginas288-293
Número de páginas6
Volumen1
EstadoPublicada - 2000
Evento2000 IEEE International Symposium on Industrial Electronics (ISIE'2000) - Puebla, México
Duración: 4 dic 20008 dic 2000

Otros

Otros2000 IEEE International Symposium on Industrial Electronics (ISIE'2000)
País/TerritorioMéxico
CiudadPuebla
Período4/12/008/12/00

Áreas temáticas de ASJC Scopus

  • Ingeniería eléctrica y electrónica

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