| Patent Number |
Title Of Patent |
Date Issued |
| 4604028 |
Independently actuated control valves for steam turbine |
August 5, 1986 |
| A control system for a steam turbine employs complementary-sized nozzle groups receiving steam in a sequence which employs the smallest possible sized group receiving steam from a control valve of the smallest possible capacity as the governing valve. All other control valves remain eith |
| 4598551 |
Apparatus and method for controlling steam turbine operating conditions during starting and load |
July 8, 1986 |
| A steam turbine-generator system includes a reheater bypass valve which cooperates with both a high- and low-pressure bypass valve in the early stages of turbine loading to divert steam in a bypass flow from a high-pressure turbine to the input of a reheat turbine without passing the |
| 4499756 |
Control valve test in cam controlled valve system |
February 19, 1985 |
| A test apparatus and method tests for closure of ganged, cam operated main control valves in a steam turbine. Cam actuation of a set of upper main control valves is separated from cam actuation of a lower set of main control valves. A test controller actuates one of the sets of main cont |
| 4464577 |
Turbine speed control |
August 7, 1984 |
| A control system for a prime mover may include a proportional speed control, a primary overspeed control and an emergency overspeed control. The proportional speed signal is obtained from select highest value logic, whereas overspeed and loss of speed signals are submitted to two out of |
| 4437313 |
HRSG Damper control |
March 20, 1984 |
| A method of and apparatus for controlling a steam turbine system for a combined cycle power plant using measured parameters to control the position of dampers regulating heat flow to steam generating equipment so as to limit thermal stresses, drum level surge and to provide load-foll |
| 4329592 |
Steam turbine control |
May 11, 1982 |
| In a power plant which includes a steam turbine with main control valves for admitting steam into the steam turbine and a steam bypass with bypass control valves for diverting steam around the steam turbine directly into a condenser, it is necessary to coordinate the operation of the res |
