Development of a 7-Level Medium Voltage Inverter System with PWM Converter for Regenerating Operation

Author

Kwang-Seob Kim ; Byung-Ki Kwon ; Sang-suk Bang ; Sang-Ho Moon ; Byung-Hun Yang ; Chang-ho Choi

Author_Institution

R&D Center, POSCON Corp., Seoul

fYear

2006

fDate

18-22 June 2006

Firstpage

1

Lastpage

5

Abstract

The 3300[V], 2[MVA] 7-level inverter system with PWM converters as an active front-end is introduced. The multi-level inverter system operates in a 4-quadrant and in a nearly unit displacement power factor and each PWM converter operates with phase-shifting by 40 degrees to improve overall AC side harmonic performance. A current controller of PWM converter has feed forward compensation to increase dynamic response and reduce capacitors. PSC(phase shifted carrier) PWM is used to control the inverter module. Vector control algorithm is implemented to control the instantaneous torque and speed of an induction motor. The experimental waveforms are also presented to verify the proposed method and performance of the developed system

Keywords

PWM power convertors; dynamic response; electric current control; feedforward; induction motors; invertors; machine vector control; power conversion harmonics; torque control; velocity control; 7-level medium voltage inverter system; AC side harmonic performance improvement; PWM converter; active front-end; current controller; dynamic response; feed forward compensation; induction motor; instantaneous torque control; inverter module control; multilevel inverter system; phase shifted carrier; speed control; vector control algorithm; Capacitors; Feeds; Induction motors; Machine vector control; Medium voltage; Power system harmonics; Pulse width modulation converters; Pulse width modulation inverters; Reactive power; Torque control;

fLanguage

English

Publisher

ieee

Conference_Titel

Power Electronics Specialists Conference, 2006. PESC '06. 37th IEEE

Conference_Location

Jeju

ISSN

0275-9306

Print_ISBN

0-7803-9716-9

Type

conf

DOI

10.1109/PESC.2006.1711809

Filename

1711809