Gas turbine plant and method of controlling gas turbine plant
원문보기
IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0368420
(2003-02-20)
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우선권정보 |
JP-0220814 (2000-07-21) |
발명자
/ 주소 |
- Nagata, Shouichi
- Komiyama, Hiroya
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출원인 / 주소 |
- Mitsubishi Heavy Industries, Ltd.
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대리인 / 주소 |
Wenderoth, Lind & Ponack, L.L.P.
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인용정보 |
피인용 횟수 :
4 인용 특허 :
9 |
초록
▼
A gas turbine plant for limiting a sudden increase of load of the gas turbine, i.e., of the amount of fuel, and suppressing a stress of the turbine, or for maintaining a suitable fuel-air ratio is disclosed. The plant includes a controller comprising a section for calculating a governor signal for c
A gas turbine plant for limiting a sudden increase of load of the gas turbine, i.e., of the amount of fuel, and suppressing a stress of the turbine, or for maintaining a suitable fuel-air ratio is disclosed. The plant includes a controller comprising a section for calculating a governor signal for controlling the degree of opening of the fuel valve, based on a revolution speed of the gas turbine; and a section for calculating a load-limiting signal for following the governor signal, wherein when the governor signal decreases, the load-limiting signal is larger than it by a predetermined value, while when the governor signal increases, the increase rate of the load-limiting signal has a predetermined upper limit. The controller also comprises a limiting section, into which both signals are input, for limiting the upper value of the governor signal by using the load-limiting signal as an upper limit.
대표청구항
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1. A gas turbine plant comprising: a gas turbine; a combustor to which fuel and air are supplied, including: a main combustor into which the supplied fuel and air are introduced; a tail pipe, to which a combustion gas is introduced from the main combustor, for introducing the combustion gas t
1. A gas turbine plant comprising: a gas turbine; a combustor to which fuel and air are supplied, including: a main combustor into which the supplied fuel and air are introduced; a tail pipe, to which a combustion gas is introduced from the main combustor, for introducing the combustion gas to the gas turbine; and a bypass valve for introducing a portion of the air supplied to the main combustor into the tail pipe; a fuel valve for controlling an amount of the fuel supplied to the combustor; and a bypass valve controller for controlling the bypass valve at an opening/closing speed according to a variation of the output of the gas turbine. 2. A gas turbine plant as claimed in claim 1, wherein the bypass valve controller includes: a bypass valve opening-degree calculating section for calculating a set value of the degree of opening of the bypass valve corresponding to the output of the gas turbine; an opening/closing speed calculating section for calculating a width of the variation of the output of the gas turbine, and calculating an opening/closing speed of the bypass valve based on the calculated width of the variation; and a first change rate limiter for controlling the bypass valve by using the opening/closing speed calculated by the opening/closing speed calculating section as a change rate of the set value of the degree of opening of the bypass valve calculated by the bypass valve opening-degree calculating section. 3. A gas turbine plant as claimed in claim 2, wherein the opening/closing speed calculating section includes: a second change rate limiter, into which the output of the gas turbine is input, for converting an increase/decrease change rate of the output of the gas turbine into a predetermined change rate, and outputting a reference output having the predetermined change rate; a subtracter, into which the output of the gas turbine and the reference output are input, for calculating a difference between the output of the gas turbine and the reference output; and a change rate calculator for calculating the opening/closing speed of the bypass valve according to the calculated difference. 4. A method of controlling a gas turbine plant which comprises: a gas turbine; a combustor to which fuel and air are supplied, including: a main combustor into which the supplied fuel and air are introduced; a tail pipe, to which a combustion gas is introduced from the main combustor, for introducing the combustion gas to the gas turbine; and a bypass valve for introducing a portion of the air supplied to the main combustor into the tail pipe; and a fuel valve for controlling an amount of the fuel supplied to the combustor, and wherein the method comprises controlling the bypass valve at an opening/closing speed according to a variation of the output of the gas turbine with a bypass valve controller for controlling the bypass valve. 5. A method of controlling a gas turbine plant, as claimed in claim 4, wherein the controlling the bypass valve includes: calculating a width of the variation of the output of the gas turbine; calculating an opening/closing speed of the bypass valve based on the calculated width of the variation; and controlling the opening/closing operation of the bypass valve by using the calculated opening/closing speed. 6. A method of controlling a gas turbine plant, as claimed in claim 5, wherein the controlling the bypass valve includes: converting an increase/decrease change rate of the output of the gas turbine into a predetermined change rate; determining a reference output having the predetermined change rate; calculating a difference between the output of the gas turbine and the reference output; and determining the calculated difference as the width of the variation of the output of the gas turbine.
이 특허에 인용된 특허 (9)
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Spraker Wilbur A. (Indianapolis IN) Kaiser Kenneth F. (Indianapolis IN), Air supply control system.
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Greenwood Stuart ; Montoya Jorge ; Kelton Mike ; Fahme Tony, Combustion air control system for a gas turbine engine.
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Slocum Gale V. (Clifton Park NY) Myers Albert (Amsterdam NY) Beebe Kenneth W. (Saratoga NY), Combustor external air staging device.
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Yamada Hiroshi (Ibaraki-ken JPX) Negishi Tadanobu (Ibaraki-ken JPX) Honda Yoshitsugu (Ibaraki-ken JPX), Gas turbine apparatus and method of operating same on gaseous fuel.
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McCarty William L. (West Chester FL) Wescott Kermit R. (Winter Springs FL), Gas turbine control system having maximum instantaneous load-pickup limiter.
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Kawamura Hideyuki,JPX ; Harashima Toshihiko,JPX ; Takahashi Shoei,JPX ; Ishida Takeshi,JPX, Method of controlling load on power plant and load control system for carrying out the same.
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Mumford Stephen E. (Longwood FL) Kosinski Andrew J. (Winter Springs FL), System for controlling combustion in a gas combustion-type turbine.
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Pfefferle ; William C., Turbine system method and apparatus.
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Forbes Sheila M. (Ancaster CA) Upton Arthur W. J. (Hamilton CA), Variable load gas turbine.
이 특허를 인용한 특허 (4)
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McKelvey, Terence; Marui, Eishi; Miyamoto, Masahiro; Kataoka, Tadashi; Furuya, Tai, Flame detecting apparatus for gas turbine.
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Terazaki,Masao; Kanezawa,Yoshiyuki; Horikawa,Hideto, Gas turbine combustion apparatus.
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Koganezawa, Tomomi, Gas turbine power generation equipment.
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Stoia, Lucas John; Melton, Patrick Benedict; Popovic, Predrag Peja, Turbine engine and method for flowing air in a turbine engine.
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