High-frequency AC/DC converter with unity power factor and minimum harmonic distortion

Thesis/Dissertation · Thu Jan 01 04:00:00 EST 1987

OSTI ID:6378134

Wernekinch, E R

The power factor is controlled by adjusting the relative position of the fundamental component of an optimized PWM-type voltage with respect to the supply voltage. Current harmonic distortion is minimized by the use of optimized firing angles for the converter at a frequency where GTO's can be used. This feature makes this approach very attractive at power levels of 100 to 600 kW. To obtain the optimized PWM pattern, a steepest descent digital computer algorithm is used. Digital-computer simulations are performed and a low-power model is constructed and tested to verify the concepts and the behavior of the model. Experimental results show that unity power factor is achieved and that the distortion in the phase currents is 10.4% at 90% of full load. This is less than achievable with sinusoidal PWM, harmonic elimination, hysteresis control, and deadbeat control for the same switching frequency.

• Research Organization: Mississippi Univ., University (USA)
• OSTI ID: 6378134
• Country of Publication: United States
• Language: English

Related Subjects

200300* -- Electric Power Engineering-- Power Transmission & Distribution-- (-1989)
24 POWER TRANSMISSION AND DISTRIBUTION
ALGORITHMS
ALTERNATING CURRENT
COMPUTERIZED SIMULATION
CONVERSION
CURRENTS
DC SYSTEMS
ELECTRIC CURRENTS
ENERGY SYSTEMS
MATHEMATICAL LOGIC
POWER FACTOR
POWER SYSTEMS
SIMULATION