Electric power conversion systems – Current conversion – Including an a.c.-d.c.-a.c. converter
Patent
1997-10-15
1999-06-29
Riley, Shawn
Electric power conversion systems
Current conversion
Including an a.c.-d.c.-a.c. converter
363 41, H02J 336
Patent
active
059177187
ABSTRACT:
A method and apparatus for eliminating overmodulation in a power plant is provided. The power plant has a direct voltage network connected to at least one alternating voltage network through a station. The station is adapted to transmit power between the direct voltage network and the alternating voltage network and includes at least one converter. The converter is adapted to convert direct voltage into alternating voltage and convert alternating voltage into direct voltage. The method comprises the steps of calculating a reference alternating voltage and measuring a direct voltage between two poles of a direct voltage side of the station. The reference voltage is divided by half of the direct voltage and this quotient is compared with a predetermined value. When the quotient exceeds the predetermined value, a first signal is sent to a means for controlling the converter. In response to receiving the first signal, the converter is controlled to increase consumption of reactive power on the alternating voltage side of the station.
REFERENCES:
patent: 4648018 (1987-03-01), Neupauer
patent: 4903184 (1990-02-01), Hirose
patent: 4941079 (1990-07-01), Ooi
patent: 5051683 (1991-09-01), Hirose et al.
patent: 5535113 (1996-07-01), Konishi
Lindberg, PWM and Control of Two and Three Level High Power Voltage Source Converters, 1995, ISSN-1100-1615, TRITA-EHE 9501 (Stockholm), See ch. 5.3.1, ch. 5.3.3, first page.
Palsson Rolf
Svensson Kjell
Asea Brown Boveri AB
Riley Shawn
LandOfFree
Method and apparatus for eliminating overmodulation in a power p does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for eliminating overmodulation in a power p, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for eliminating overmodulation in a power p will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1381442