Steam turbine control system and method of controlling the ratio of steam flow between under full-arc admission mode and under partial-arc admission mode
US4120159A · kind A · utility
41Cited by
4References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 19, 1976 |
| Grant date | Oct 17, 1978 |
| Priority date | — |
| Expiry date | Oct 19, 1996 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01D17/18
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
In a steam turbine-generator with means for determining a load demand signal in accordance with a load reference signal, means for determining the valve opening under each admission mode of full-arc and partial-arc in accordance with said load demand signal and means for adjusting the ratio between valve openings under the each admission mode in accordance with a load change the ratio of steam flow under each of the admission modes is controlled in accordance with a load change so as to minimize the thermal stresses and thereby reduce the turbine load changing time.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.