IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0504401
(1983-06-15)
|
우선권정보 |
JP-0103941 (1982-06-18) |
발명자
/ 주소 |
- Kawai, Kensuke
- Tanaka, Shuntaro
|
출원인 / 주소 |
- Tokyo Shibaura Denki Kabushiki Kaisha
|
대리인 / 주소 |
Schwartz, Jeffery, Schwaab, Mack, Blumenthal & Evans
|
인용정보 |
피인용 횟수 :
9 인용 특허 :
8 |
초록
▼
A machine-implemented method of operating a thermal power generating plant having at least one power generating unit comprises (A) determining, in accordance with a given time point t 1 at which the power generating unit is to become capable of load control and assumed time length T 1 for time lengt
A machine-implemented method of operating a thermal power generating plant having at least one power generating unit comprises (A) determining, in accordance with a given time point t 1 at which the power generating unit is to become capable of load control and assumed time length T 1 for time length of initial load holding TINT, a predicted value t' PI of a time point t PI of parallel-in, a predicted value t' GT of a time point t GT of a gas turbine start; and a predicted value t' INC of a time point t INC of initial load hold completion; and (B) correcting the predicted values t' PI, t' GT and t' INC by adding k(t 1 -t' INC ) to t' PI, t' GT and t' INC, respectively, k being a given value satisfying 0<k≤1.
대표청구항
▼
1. A machine-implemented method of operating a thermal power generating plant having at least one power generating unit comprising the steps of: (A) determining, in accordance with a given time point t 1 at which the power generating unit is to become capable of load control and assumed time leng
1. A machine-implemented method of operating a thermal power generating plant having at least one power generating unit comprising the steps of: (A) determining, in accordance with a given time point t 1 at which the power generating unit is to become capable of load control and assumed time length T 1 for time length of initial load holding TINT, a predicted value t' PI of a time point t PI of parallel-in, a predicted value t' GT of a time point t GT of a gas turbine start; and a predicted value t' INC of a time point t INC of initial load hold completion; and (B) correcting the predicted values t' PI, t' GT and t' INC by adding k(t 1-t' INC ) to t' PI, t' GT and t' INC, respectively, k being a given value satisfying 0<k≤1. 2. A method as set forth in claim 1, wherein T 1 is corrected in accordance with the correction of t' PI and t' GT, and the steps (A) and (B) are repeated until the difference (t 1 -t' INC ) becomes smaller than a predetermined value. 3. A method as set forth in claim 2, the repetition of the steps (A) and (B) is terminated when the number of repetition becomes a predetermined number. 4. A method as set forth in claim 1, wherein the determination of t' INC at the step (A) is performed by: determining, in accordance with t' PI and a time point T 52G of the latest line-off, a predicted value H FSI of the first stage inner metal temperature at the time point t' PI ; determining, in accordance with given parameters of the plant, a predicted value H FSO of the first stage outlet steam temperature at the time point t' PI ; determining, in accordance with H FSI and H FSO, a time length TRLD 0 of load rising period, and a time length TINT of initial load holding; and determining t' INC from t' PI, TRLD 0 and TINT. 5. A method as set forth in claim 4, wherein H FSO is determined by: determining a main steam temperature H MST and a main steam pressure H MSO at the time point t' PI, from given parameters of the plant; and determining H FSO from H MST and H MSO in accordance with a function representing the thermodynamic characteristic of the turbine. 6. A method as set forth in claim 4, wherein TRLD 0 and TINT are determined by: determining a mismatch temperature H MIS from H FSO and H FSI by subtracting H FSI from H FSO ; and determining TRLD 0 and TINT from H MIS in accordance with a given mismatch chart stored in a computer system. 7. A machine-implemented method of operating a thermal generating plant comprising a plurality of power generating units comprising the steps of: (I) providing a target load schedule; (II) determining, in accordance with the target load schedule, a time point at which there should occur entry into operation of a power generating unit; (III) selecting a power generating unit as one entering into operation at the time point determined at the step (II); (IV) determining a time schedule of start up of the power generating unit selected at the step (III); and (V) implementing the start-up operation of the selected power generating unit in accordance with the time schedule of start-up determined at the step (IV). 8. A method as set forth in claim 7, wherein said step (III) of selecting a power generating unit comprises selecting the power generating unit which, at the time of the entry into operation, will have been out of operation for the shortest time. 9. A method as set forth in claim 7, further comprising the steps of: (VI) determining, in accordance with the target load schedule, a time point at which there should occur line off of a power generating unit; (VII) selecting a power generating unit as one to be shut down at the time point determined at the step (VI); and (VIII) shutting down the selected power generating unit at the time point determined at the step (VI). 10. A method as set forth in claim 7, wherein said step (IV) of determining a time schedule comprises the steps of: (A) determining, in accordance with a given time point t 1 at which the power generating unit is to become capable of load control and assumed time length T 1 for time length of initial load holding TINT, a predicted value t' PI of a time point t PI of parallel-in, a predicted value t' GT of a time point t GT of a gas turbine start; and a predicted value t' INC of a time point t INC of initial load hold completion; and (B) correcting the predicted values t' PI, t' GT and t' INC by adding k(t 1 -t' INC ) to t' PI, t' GT and t' INC, respectively, k being a given value satisfying 0<k≤1. 11. A method as set forth in claim 10, wherein T 1 is corrected in accordance with the correction of t' PI and t' GT, and the steps (A) and (B) are repeated until the difference (t 1 -t' INC ) becomes smaller than a predetermined value. 12. A method as set forth in claim 10, the repetition of the steps (A) and (B) is terminated when the number of repetition becomes a predetermined number. 13. A method as set forth in claim 10, wherein the determination of t' INC at the step (A) is performed by: determining, in accordance with t' PI and a time point T 52G of the latest line-off, a predicted value H FSI of the first stage inner metal temperature at the time point t' PI ; determining, in accordance with given parameters of the plant, a predicted value H FSO of the first stage outlet steam temperature at the time point t' PI ; determining, in accordance with H FSI and H FSO, a time length TRLD 0 of load rising period, and a time length TINT of initial load holding; and determining t' INC from t' PI, TRLD 0 and TINT. 14. A method as set forth in claim 13, wherein H FSO is determined by: determining a main steam temperature H MST and a main steam pressure H MSO at the time point t' PI, from given parameters of the plant; and determining H FSO from H MST and H MSO in accordance with a function representing the thermodynamic characteristic of the turbine. 15. A method as set forth in claim 13, wherein TRLD 0 and TINT are determined by: determining a mismatch temperature H MIS from H FSO and H FSI by subtracting H FSI from H FSO ; and determining TRLD 0 and TINT from H MIS in accordance with a given mismatch chart stored in a computer system.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.