[특허]Dynamic stabilizer for synchronous machines having torsional oscillations and method

Dynamic stabilizer for synchronous machines having torsional oscillations and method 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	H02H-007/06 H02P-009/00
출원번호	US-0466318 (1974-05-02)
발명자 / 주소	South William H. (McKeesport PA) Kilgore Lee A. (Export PA)
출원인 / 주소	Westinghouse Electric Corporation (Pittsburgh PA 02)
인용정보	피인용 횟수 : 22 인용 특허 : 0

초록 ▼

A dynamic stabilizer which includes a voltage generator connected in series with the output terminals of a synchronous AC generator provides compensation for voltages produced by the main AC synchronous machine which compensation is provided to overcome the effects of torsional oscillation between masses in the main AC generator system. Torsional oscillations may exist between the masses of turbines driving the AC generator, the exciter mass for the AC generator, and the mass of the rotor of the generator. Shaft angular velocity is sensed and provided to a frequency discriminating filter since the speed is proportional to the torsional oscillation and since a reference signal is provided to the frequency discriminating filter, the frequency discriminating filter provides an output signal which is proportional to the reference signal plus and minus the frequency of the torsional oscillation. This signal is provided to the previously named series connected generator where a 180°phase shift is effectuated between the output signal of the frequency discriminating filter and the output power from the AC synchronous generator. Scaling means is provided to conveniently match the peak amplitudes of the last named signals. The effect of the phase shift of the signal from the frequency discriminating filter as it is applied to the series connected generator is to compensate for the effect of the torsional oscillations in the output power signal of the AC synchronous generator thus providing a power signal for use in a load which is generally without modulating torsional oscillation.

대표청구항 ▼

A dynamic stabilizer for compensating for the effect on output electrical power of torsional oscillation in a resilient shaft between masses of an electrical power generating system which is capable of generating electrical power at a nominal frequency, comprising: a. torsional oscillation sensing means for sensing said torsional oscillation, said torsional oscillation sensing means having an output, said torsional oscillation sensing means providing a torsional oscillation output signal at said latter output which latter signal is related to said torsional oscillation; b. transfer means for operating on said torsional oscillation output signal, said transfer means having an input and an output, said transfer means input being connected to said torsional oscillation sensing means output to receive said torsional oscillation output signal, said transfer means operating on said torsional oscillation output signal in such a manner as to provide a resulting transfer means output, signal at said transfer means output which is characterized as being related to said nominal frequency of said electrical power and said torsional oscillation; and c. compensating means for directly compensating for the effect of said torsional oscillation on said generating system output electrical power, said compensating means having a first input which is connected to an electrical power output terminal of said power generating system where said output electrical power is available, said compensating means having a second input which is connected to said output of said transfer means, said compensating means having an output which is connectable with a load, said compensating means receiving said output electrical power from said generating system at said first input which power is affected by said torsional oscillation, said compensating means receiving said transfer means output signal, said later signal being utilized by said compensating means to operate directly on said output electrical power to thereby make available to said load electrical power which is generally unaffected by said torsional oscillation even though said torsional oscillation is present in said shaft.

이 특허를 인용한 특허 (22)

Sun ; Shan C., Apparatus for detecting subsynchronous current in power systems.
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Kotake Tosio (Ichikawa JPX) Watanabe Katuaki (Kawasaki JPX) Koyanagi Kaoru (Yachiyo JPX), Control apparatus for a synchronous machine.
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Putman Thomas H. (Penn Hills PA) Ramey Donald G. (Churchill Borough PA), Dynamic parallel inductive stabilizer for synchronous machines having torsional oscillations.
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Markunas, Albert L.; Madalli, Vijay K.; Baker, Donal E.; Sagona, John, Electric load damper for damping torsional oscillation.
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Bowers Jack R. (Madison IL), Electronic circuit for control of a voltage regulator of an electrical generator.
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Ellerthorpe, Scott; Botka, Christopher, Energy-absorbing filter for a motor.
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Bjorklund, Hans, Means for damping mechanical torsional oscillations of an electric a.c. generator.
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Hobelsberger, Max; Mark, Bernhard, Method for monitoring an electrodynamic machine.
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Chan, Kevin; Li, Hongtao; Oesterheld, Joerg, Method for operating a thermal power plant.
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Jiao, Shaohua; Zhang, Tao; Liu, Quan; Liang, Xinyan; Li, Yuansheng, Method of coordinated operation for turbine-generator shafts torsional vibration protection.
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Kimmel Donald S. (Monroeville PA) South William H. (McKeesport PA), Noise reduction means for a dynamic stabilizer for synchronous machines having torsional oscillations and method.
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Sihler, Christof Martin; Achilles, Alfredo Sebastian; Schramm, Simon Herbert, Power system stabilizer and method.
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Vithayathil John J. (3814 NE. 136th Pl. Portland OR 97230), Scheme for rapid adjustment of network impedance.
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Larsen, Einar V.; Baker, Daniel H.; Bowler, Colin E. J., Series-thyristor subsynchronous damper for power generators.
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Gyugyi, Laszlo, Static VAR generation for transmission line compensation.
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Gyugyi Laszlo (Penn Hills PA), Static VAR generation for transmission line compensation of subsynchronous resonance.
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Bhargava Bharat (Walnut CA), Subsynchronous resonance detection.
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Blackwelder, Mark Jon; Rancuret, Paul M., Synchronous electrical power distribution system.
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de Mello F. Paul (Burnt Hills NY) Hannett Louis N. (Hudson NY) Parkinson David W. (Burnt Hills NY) Czuba John S. (New York NY), System for stabilizing synchronous machines.
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Gemin, Paul Robert; Becker, Thomas Lee; Steen, Tod Robert, Torsional damping for gas turbine engines.
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Wright ; George F. ; Swann ; Dale A., Torsional protective device for power system stabilizer.
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Hurley, Joseph David; Clayton, Peter Jon, Using static excitation system to reduce the amplitude of torsional oscillations due to fluctuating industrial loads.
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IPC	Description
A	생활필수품
A62	인명구조; 소방(사다리 E06C)
A62B	인명구조용의 기구, 장치 또는 방법(특히 의료용에 사용되는 밸브 A61M 39/00; 특히 물에서 쓰이는 인명구조 장치 또는 방법 B63C 9/00; 잠수장비 B63C 11/00; 특히 항공기에 쓰는 것, 예. 낙하산, 투출좌석 B64D; 특히 광산에서 쓰이는 구조장치 E21F 11/00)
A62B-1/08	.. 윈치 또는 풀리에 제동기구가 있는 것

내보내기 구분	파일저장 인쇄 메일전송
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Dynamic stabilizer for synchronous machines having torsional oscillations and method 원문보기

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Dynamic stabilizer for synchronous machines having torsional oscillations and method 원문보기

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