Dual fuel type combined turbine plant and method for operating the same
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F02C-006/18
F02C-007/00
출원번호
US-0704983
(2003-11-12)
우선권정보
JP-2002/329078(2002-11-13)
발명자
/ 주소
Tanaka,Satoshi
Tanaka,Koji
출원인 / 주소
Mitsubishi Heavy Industries, Ltd.
대리인 / 주소
Wenderoth, Lind &
인용정보
피인용 횟수 :
3인용 특허 :
3
초록▼
A turbine plant includes a steam turbine, a gas turbine connected to the steam turbine, a generator, and an analyzing apparatus. The steam turbine includes a high pressure steam turbine, an intermediate pressure steam turbine, and a low pressure steam turbine. The turbine plant is adapted to be dri
A turbine plant includes a steam turbine, a gas turbine connected to the steam turbine, a generator, and an analyzing apparatus. The steam turbine includes a high pressure steam turbine, an intermediate pressure steam turbine, and a low pressure steam turbine. The turbine plant is adapted to be driven by a selected one of natural gas and oil. The analyzing apparatus collects estimates of the steam turbine output based on the inlet steam pressure of the intermediate steam turbine with a correction value. The correction value is calculated including the influence of the difference between the gas fuel case and the oil fuel case. The analyzing apparatus estimates a gas turbine output by calculating the difference between the estimated steam turbine output and the total output of the turbine plant. The gas turbine is operated using the estimated gas turbine output.
대표청구항▼
What is claimed is: 1. A turbine plant adapted to be driven by a selected one of gas fuel and oil fuel comprising: a steam turbine which includes a high pressure steam turbine, an intermediate pressure steam turbine, and a low pressure steam turbine; a gas turbine connected to said steam turbine b
What is claimed is: 1. A turbine plant adapted to be driven by a selected one of gas fuel and oil fuel comprising: a steam turbine which includes a high pressure steam turbine, an intermediate pressure steam turbine, and a low pressure steam turbine; a gas turbine connected to said steam turbine by a rotation shaft; a generator connected to said steam turbine and said gas turbine by said rotation shaft; and an analyzing unit which includes: a pressure measuring unit which measures a steam pressure of an inlet side of said intermediate pressure steam turbine; a correction estimating unit which estimates a correction value associated with output of said low pressure steam turbine; and an estimating unit which estimates output of said steam turbine based on said steam pressure and said correction value. 2. The turbine plant of claim 1, where said gas turbine is connected to said steam turbine by a single said rotation shaft and said generator is connected to said steam turbine and said gas turbine by the single said rotation shaft. 3. The turbine plant according to claim 2, wherein said correction value is calculated based on a flow rate of steam flowing into said low pressure steam turbine. 4. The turbine plant according to claim 2, further comprising: a detecting unit which detects an opening of a regulating valve which regulates a flow rate of steam flowing into said low pressure steam turbine; an inlet pressure measuring unit which measures an inlet steam pressure of said regulating valve; and an outlet pressure measuring unit which measures an outlet steam pressure of said regulating valve, said correction value being calculated based on said opening and said inlet steam pressure and said outlet steam pressure. 5. The turbine plant according to claim 2, further comprising: a first correction unit calculating a first correction value based on a steam temperature of an inlet side of said high pressure steam turbine; a second correction unit calculating a second correction value based on a steam temperature of an inlet side of said intermediate pressure steam turbine; and a third correction unit calculating a third correction value based on a degree of vacuum in a steam condenser which receives steam from said steam turbine, wherein said estimating unit estimates output of said steam turbine based on said first correction value and said second correction value and said third correction value. 6. The turbine plant according to claim 2, further comprising; a gas turbine output estimating unit calculating gas turbine output by subtracting output of said steam turbine from total output of said turbine plant. 7. The turbine plant according to claim 2, wherein a flow rate of low pressure steam flowing into said low pressure steam turbine when gas fuel is supplied to said turbine plant is different from a flow rate of said low pressure steam when oil fuel is supplied to said turbine plant. 8. The turbine plant according to claim 2, further comprising: a preheating unit through which water passes when gas fuel is combusted and which bypasses water when oil fuel is combusted; a bypass valve through which said water passes so that said water bypasses said preheating unit when oil fuel is combusted; a deaerator which receives the water from said preheating unit when gas fuel is combusted and from said bypass valve when oil fuel is combusted; and a heating steam supply piping which supplies steam for heating from a low pressure piping to said low pressure steam turbine inlet to said deaerator when said deaerator receives the water. 9. A turbine plant according to claim 2, wherein said gas turbine includes a premix combustor. 10. A turbine plant according to claim 2, further comprising: a gas turbine output estimating unit which calculates gas turbine output by subtracting output of said steam turbine from total output of said turbine plant; and a gas turbine air controlling unit controlling a flow rate of air introduced to said gas turbine based on said gas turbine output. 11. A turbine plant according to claim 10, further comprising: a compressor air controlling unit controlling a flow rate of air introduced to a compressor included in said gas turbine based on said gas turbine output. 12. A turbine plant according to claim 10, further comprising: a combustor air controlling unit controlling a flow rate of air introduced to a combustor of said gas turbine based on said gas turbine output. 13. A turbine plant according to claim 10, further comprising: a bypass valve for controlling a flow rate of air exhausted from a compressor included in said gas turbine and flowing into a combustor included in said gas turbine. 14. A turbine plant analyzing apparatus for analyzing a turbine plant, adapted to be driven by a selected one of gas fuel and oil fuel, including, a steam turbine which includes a high pressure steam turbine, an intermediate pressure steam turbine, and a low pressure steam turbine; a gas turbine connected to said steam turbine by a rotation shaft; and a generator connected to said steam turbine and said gas turbine by said rotation shaft; wherein said turbine plant analyzing apparatus comprises: a pressure measuring unit which measures a steam pressure of an inlet side of said intermediate pressure steam turbine; a correction estimating unit which estimates a correction value associated with output of said low pressure steam turbine; and an estimating unit which estimates output of said steam turbine based on said steam pressure and said correction value. 15. The turbine plant analyzing apparatus according to claim 14, wherein said correction value is calculated based on a flow rate of steam flowing into said low pressure steam turbine. 16. The turbine plant analyzing apparatus according to claim 14, further comprising: a detecting unit which detects an opening of a regulating valve which regulates a flow rate of steam flowing into said low pressure steam turbine; an inlet pressure measuring unit which measures an inlet steam pressure of said regulating valve; and an outlet pressure measuring unit which measures an outlet steam pressure of said regulating valve, said correction value being calculated based on said opening and said inlet steam pressure and said outlet steam pressure. 17. The turbine plant analyzing apparatus according to claim 14, further comprising: a first correction unit calculating a first correction value based on a steam temperature of an inlet side of said high pressure steam turbine; a second correction unit calculating a second correction value based on a steam temperature of an inlet side of said intermediate pressure steam turbine; and a third correction unit calculating a third correction value based on a degree of vacuum in a steam condenser which receives steam from said steam turbine, wherein said estimating unit estimates output of said steam turbine based on said first correction value and said second correction value and said third correction value. 18. The turbine plant analyzing apparatus according to claim 14, further comprising: a gas turbine output estimating unit calculating gas turbine output by subtracting output of said steam turbine from total output of said turbine plant. 19. An operation method of a turbine plant, adapted to be driven by a selected one of gas fuel and oil fuel, including; a steam turbine; a gas turbine connected to said steam turbine by a rotation shaft; and a generator connected to said steam turbine and said gas turbine by said rotation shaft, wherein said steam turbine comprises: a high pressure steam turbine; an intermediate pressure steam turbine; and a low pressure steam turbine, and wherein said method comprises: calculating gross output of said steam turbine by using an inlet steam pressure of said intermediate pressure steam turbine; calculating a correction value associated with output of said low pressure steam turbine; calculating net output of said steam turbine by adding said gross output and said correction value; and controlling said gas turbine based on a difference between said net output and said total output of said turbine plant.
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이 특허에 인용된 특허 (3)
Morikawa, Aki; Sugimori, Yoichi; Oikawa, Haruo, Combined cycle power plant.
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