Feedback control method for controlling the starting of a steam turbine plant
US4132076A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 23, 1976 |
| Grant date | Jan 2, 1979 |
| Priority date | — |
| Expiry date | Jul 23, 1996 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF01K7/24
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
The invention concerns a feedback control method for controlling the starting of a steam turbine unit comprising a reheater, a turbine by-pass system consisting of a HP-by-pass system and a LP-by-pass system, at least one regulating valve for the HP-by-pass system, at least one regulating valve for the LP-by-pass system, at least one inlet valve for the HP-turbine, at least one intercept valve for the MP/LP-turbine and a governing device to regulate the turbine speed or power output, according to which method during no-load and low-load operation and up to a predetermined partial load the pressure within the reheater is regulated by a first feedback control device with the LP-by-pass regulating valve acting as positioning element in such manner that a greater quantity of steam will flow through the HP-turbine than through the MP-turbine, and a smaller quantity of steam through the HP-by-pass system than through the LP-by-pass system, whereby a maximum permissible HP-exhaust steam temperature will not be exceeded, and when the partial load is greater than said predetermined value the pressure within the reheater is regulated by a second feedback control device with the intercept val…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.