IT1263665B - PROCEDURE FOR IMPROVING THE OPERATIONAL EFFICIENCY OF A STEAM TURBINE ELECTRICITY GENERATION SYSTEM DURING VARIATION OF THE OUTPUT POWER - Google Patents
PROCEDURE FOR IMPROVING THE OPERATIONAL EFFICIENCY OF A STEAM TURBINE ELECTRICITY GENERATION SYSTEM DURING VARIATION OF THE OUTPUT POWERInfo
- Publication number
- IT1263665B IT1263665B ITPD930117A ITPD930117A IT1263665B IT 1263665 B IT1263665 B IT 1263665B IT PD930117 A ITPD930117 A IT PD930117A IT PD930117 A ITPD930117 A IT PD930117A IT 1263665 B IT1263665 B IT 1263665B
- Authority
- IT
- Italy
- Prior art keywords
- pressure
- transition
- valve
- point
- pulse chamber
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D1/00—Non-positive-displacement machines or engines, e.g. steam turbines
Abstract
Procedimento per migliorare l'efficienza operativa di un impianto di generazione di energia elettrica a turbine a vapore ad arco parziale durante variazioni della potenza d'uscita regolando dinamicamente valori dei punti valvolari durante il funzionamento della turbina. La pressione della camera a impulsi in corrispondenza di ciascuno di una pluralità di punti valvolari viene dapprima determinata durante il funzionamento della turbina a vapore a pressione costante. Per ciascuna coppia adiacente di punti valvolari, é quindi calcolata una pressione di punto di transizione di pressione costante ottimale per la transizione dall'uno all'altro tra il modo e pressione scorrevole o variabile e modo a pressione costante. La pressione del punto di trasmissione a pressione costante ottimale per ciascuna coppia di punti valvolari viene convertito in una corrispondenza percentuale della differenza di pressione tra le coppie adiacenti di punti valvolari. La pressione della camera a impulsi in corrispondenza di ciascun punto valvolare é quindi impiegata per calcolare una corrispondente pressione della camera a impulsi per il passeggio da un modo all'altro modo in base alla differenza di pressione percentuale. Le pressioni della camera a impulsi calcolate per la transizione sono comparate con valori misurati della pressione della camera a impulsi e il sistema forza transizione o passaggio da uno dei modi all'altro modo quando il valore misurato è sostanzialmente uguale alla pressione di transizione calcolato. Transizione da funzionamento a pressione variabile e funzionamento e pressione costante é inoltre modificata aumentando gradualmente la pressione da una pressione minima in corrispondenza di un punto di transizione ad una pressione massima in corrispondenza di un punto di chiusura delle valvole per ridurre le sollecitazioni termiche sul rotore. Durante il graduale aumento di pressione, la valvola di controllo associata con il punto di transizione e con il punto valvolore é gradualmente chiusa contemporaneamente all'aumento nella pressione del vapore.Procedure for improving the operating efficiency of a partial-arc steam turbine electricity generation plant during output power variations by dynamically adjusting the values of the valve points during turbine operation. The pressure of the pulse chamber at each of a plurality of valve points is first determined during operation of the constant pressure steam turbine. For each adjacent pair of valve points, an optimum constant pressure transition point pressure is then calculated for the transition from one to the other between the sliding and variable mode and pressure and the constant pressure mode. The optimum constant pressure transmission point pressure for each pair of valve points is converted into a percentage correspondence of the pressure difference between adjacent pairs of valve points. The pressure of the pulse chamber at each valve point is then used to calculate a corresponding pressure of the pulse chamber for walking from one mode to another based on the percentage pressure difference. The pulse chamber pressures calculated for the transition are compared with measured values of the pulse chamber pressure and the system forces transition or transition from one of the modes to the other when the measured value is substantially equal to the calculated transition pressure. Transition from variable pressure operation and constant operation and pressure is also modified by gradually increasing the pressure from a minimum pressure at a transition point to a maximum pressure at a valve closing point to reduce thermal stress on the rotor. During the gradual increase in pressure, the control valve associated with the transition point and the valve point is gradually closed simultaneously with the increase in vapor pressure.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US07/891,338 US5333457A (en) | 1991-10-07 | 1992-05-29 | Operation between valve points of a partial-arc admission turbine |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| ITPD930117A0 ITPD930117A0 (en) | 1993-05-19 |
| ITPD930117A1 ITPD930117A1 (en) | 1994-11-19 |
| IT1263665B true IT1263665B (en) | 1996-08-27 |
Family
ID=25398008
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| ITPD930117A IT1263665B (en) | 1992-05-29 | 1993-05-19 | PROCEDURE FOR IMPROVING THE OPERATIONAL EFFICIENCY OF A STEAM TURBINE ELECTRICITY GENERATION SYSTEM DURING VARIATION OF THE OUTPUT POWER |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPH0811923B2 (en) |
| KR (1) | KR930023578A (en) |
| CA (1) | CA2097267A1 (en) |
| ES (1) | ES2088814B1 (en) |
| IT (1) | IT1263665B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4650298B2 (en) | 2006-02-23 | 2011-03-16 | Ｔｄｋ株式会社 | Composite electronic components |
| CN105134312B (en) * | 2015-08-17 | 2016-10-26 | 西安西热节能技术有限公司 | A kind of subcritical nozzle governing steam turbine operation valve position determines method |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4297848A (en) * | 1979-11-27 | 1981-11-03 | Westinghouse Electric Corp. | Method of optimizing the efficiency of a steam turbine power plant |
| US4320625A (en) * | 1980-04-30 | 1982-03-23 | General Electric Company | Method and apparatus for thermal stress controlled loading of steam turbines |
| US4888954A (en) * | 1989-03-30 | 1989-12-26 | Westinghouse Electric Corp. | Method for heat rate improvement in partial-arc steam turbine |
-
1993
- 1993-05-19 IT ITPD930117A patent/IT1263665B/en active IP Right Grant
- 1993-05-21 ES ES09301101A patent/ES2088814B1/en not_active Expired - Lifetime
- 1993-05-27 KR KR1019930009392A patent/KR930023578A/en active IP Right Grant
- 1993-05-28 JP JP5127389A patent/JPH0811923B2/en not_active Expired - Lifetime
- 1993-05-28 CA CA002097267A patent/CA2097267A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0811923B2 (en) | 1996-02-07 |
| KR930023578A (en) | 1993-12-21 |
| ES2088814R (en) | 1997-05-16 |
| ES2088814B1 (en) | 1997-12-01 |
| ITPD930117A1 (en) | 1994-11-19 |
| JPH0633704A (en) | 1994-02-08 |
| ITPD930117A0 (en) | 1993-05-19 |
| CA2097267A1 (en) | 1993-11-30 |
| ES2088814A2 (en) | 1996-09-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 0001 | Granted | ||
| TA | Fee payment date (situation as of event date), data collected since 19931001 |
Effective date: 19970530 |