DocumentCode :
275290
Title :
AC-DC system power flow control by PWM converter
Author :
Hall, J.K. ; Mak, O.C.
Author_Institution :
Loughborough Univ. of Technol., UK
fYear :
1990
fDate :
17-19 Jul 1990
Firstpage :
312
Lastpage :
316
Abstract :
Developments in gate/base turn-off semiconductor devices with high power handling capabilities, principally the gate turn-off thyristor (GTO), have led to compact self-commutating converter circuits being widely used for applications such as AC drives, where control of the AC voltage and frequency at the motor terminals are needed. The converter operates as an inverter to supply power from the DC source to the motor, or with reversed power flow as a rectifier for braking. Additionally, pulse width modulation (PWM) can be employed for variation of the AC voltage and improving the generated AC voltage and current waveforms. Operation is again in two quadrants, but power reversal is by reversal of the direct current, not the voltage, which is much more convenient. The use of such a converter is considered as an alternative to that controlled by firing delay for long term bidirectional control of power flow between live AC and DC systems
Keywords :
load flow; power control; power convertors; pulse width modulation; AC-DC system power flow control; DC reversal; PWM converter; firing delay; gate turn-off thyristor; gate/base turn-off semiconductor devices; inverter; power reversal; rectifier;
fLanguage :
English
Publisher :
iet
Conference_Titel :
Power Electronics and Variable-Speed Drives, 1991., Fourth International Conference on
Conference_Location :
London
Type :
conf
Filename :
114660
Link To Document :
بازگشت