Electricity: single generator systems – Generator control – With means for suppressing – eliminating or minimizing...
Patent
1992-05-15
1993-07-13
Stephan, Steven L.
Electricity: single generator systems
Generator control
With means for suppressing, eliminating or minimizing...
307102, 307105, 323210, 323211, 323218, 361 58, H02K 1100
Patent
active
052277135
ABSTRACT:
A subsynchronous resonance mitigation system, including a method and apparatus, for damping undesirable subsynchronous resonance oscillations in a generator, which, if left unchecked, may damage the shafts of a turbine-generator set. A remote coupling apparatus, such as a thyristor controlled series capacitor (TCSC) system, a sourced inverter device, or a static phase shifter, is coupled to the generator by a transmission line. In response to a firing command, the coupling apparatus introduces subsynchronous resonance mitigating currents into the transmission line. Sensors monitor power line parameters and/or the generator speed, and in response thereto, a higher-level controller generates a voltage command. A vernier controller responds to the monitored power line parameters and the voltage command to provide the firing command to the coupling apparatus.
REFERENCES:
patent: 3813593 (1974-05-01), Tice et al.
patent: 4292545 (1981-09-01), Hingorani
patent: 4302715 (1981-11-01), Putman et al.
patent: 4311253 (1982-01-01), Putman et al.
patent: 4355241 (1982-10-01), Hingorani
patent: 4384246 (1983-05-01), Larsen et al.
patent: 4434376 (1984-02-01), Hingorani
patent: 4438386 (1984-03-01), Gyugyi
patent: 4451777 (1984-05-01), Gyugyi
patent: 4513240 (1985-04-01), Putman
patent: 4567423 (1986-01-01), Dobsa et al.
patent: 4607217 (1986-08-01), Bhargava
patent: 4695741 (1987-09-01), Takeda
patent: 4701689 (1987-10-01), Yuan et al.
patent: 4719554 (1988-01-01), Bertschi
patent: 4724333 (1988-02-01), Hedin
patent: 4733340 (1988-03-01), Mase et al.
patent: 4808843 (1989-02-01), Hedin
patent: 4825270 (1989-04-01), Satou et al.
patent: 4843513 (1989-06-01), Edris
patent: 4855664 (1989-08-01), Lane
patent: 4888676 (1989-12-01), Zurcher
patent: 4999565 (1991-03-01), Nilsson
patent: 5006784 (1991-04-01), Sonntagbauer
patent: 5032738 (1991-07-01), Vithayathil
Christl, et al., "Advanced Series Compensation with Variable Impedance," presented at EPRI FACTS Workshop, Cincinnati, Ohio, Nov. 14, 1990.
P. Wood, et al., "Study of Improved Load-Tap Changing for Transformers and Phase-Angle Regulators," EPRI Report No. EL-6079, Nov., 1988.
Hingorani et al., "Prototype NGH Subsynchronous Resonance Damping Scheme Part I--Field Installation and Operating Experience," IEEE Transactions on Power Systems PWRS-2, No. 4:1034-1039 (Nov. 1987).
Baker Daniel H.
Bowler Colin E. J.
Larsen Einar V.
Electric Power Research Institute
Stephan Steven L.
Sterrett J.
LandOfFree
Vernier control system for subsynchronous resonance mitigation does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Vernier control system for subsynchronous resonance mitigation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Vernier control system for subsynchronous resonance mitigation will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2314752