Control system with adaptive process controllers especially adapted for electric power plant operation
US3939328A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 6, 1973 |
| Grant date | Feb 17, 1976 |
| Priority date | — |
| Expiry date | Nov 6, 1993 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF05D2200/11
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An electric power plant including a steam generator and a steam turbine is operated by a control system including a turbine control, a boiler control and a plant unit master; each of the aforementioned controls includes integrating or adaptive controllers responsive to error signals to effect a desired control and ramp generators to provide an output against which a control process may be tracked. The integrating controllers include an integrating circuit for integrating an input error signal and a proportional circuit responsive to the error signal for providing an output signal to be summed with the output of the integrating circuit. The constant of the proportional circuit and the time constant of the integrating circuit are changed as a function of an index. In a control for an electric power plant, the index is the load reference provided by the plant unit master. A ramp generator is suggested that is capable of generating linear ramps at a fixed rate toward a known value, e.g. the control reference to be entered, and includes an integrating circuit to which is selectively applied first and second reference signals dependent upon whether the input signal is above or below a pr…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.