System for manually or automatically transferring control between computers without power generation disturbance in an electric power plant or steam turbine operated by a multiple computer control system
US4031372A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 6, 1973 |
| Grant date | Jun 21, 1977 |
| Priority date | — |
| Expiry date | Nov 6, 1993 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F11/2028
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An electric power plant including a steam generator and a steam turbine is operated by a control system including two redundant digital computers. Switching circuitry is provided for coupling one of the computers through interface equipment to the steam generator and the turbine and a generator according to programmed computer control. A data link is established between the computers to transfer manual/automatic status and other needed data from the control computer to the standby computer. A system is provided for detecting when certain hardware and software malfunctions have occurred and for responsively transferring control to the standby computer. The standby computer is tracked to the control computer so that control computer transfer can be made reliably without disturbing the electric power generation process. Tracking is produced by a system which includes the data link as well as tracking controls in the noncontrolling computer. Such tracking controls function in the tracking mode of the noncontrolling computer to conform the control outputs of the two computers with little or no offset. On the execution of a computer transfer, the tracking controls are bumplessly switched…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.