JACK H SMITH
Real Estate Commission in Pittsburgh, PA

4028884, Jun 14, 1977

Dec 27, 1974

5/537036

Lyle F. Martz - Verona PA
Jack R. Smith - Pittsburgh PA
Francis A. Lebonette - Swarthmore PA
Robert A. Putnam - Elverson PA
Paul A. Berman - Plymouth Meeting PA

Westinghouse Electric Corporation - Pittsburgh PA

F02C 702

60 3918B

A combined cycle electric power generating plant includes gas and steam turbines and a heat recovery steam generator recovering the heat in the exhaust gases exited from the gas turbine and for using the recovered heat to produce and supply steam to the steam turbine. The gas turbine includes a plurality of variably set guide vanes whose position may be set to determine the inlet flow to the gas turbine. Guide vane control apparatus is provided to limit the inlet guide vane position as a function of gas turbine compressor inlet temperature in accordance with a desired gas turbine exhaust flow, and to match the gas turbine exhaust flow to the steam requirements of the steam generator as in turn determined by the load placed upon its steam turbine. In addition, an afterburner is provided to supplementally heat the exhaust gas turbine gases before they are directed to the steam generator. During the startup, the afterburners are operated to supply supplemental heating to the gas turbine exhaust gases supplied to the steam generator whereby the temperature of the steam passed to the steam turbine is maintained at a minimum level.

3975902, Aug 24, 1976

Jun 4, 1974

5/476182

Jack R. Smith - Pittsburgh PA
Leonard H. Burrows - Gibsonia PA
Richard S. Heiser - Pittsburgh PA
Richard J. Hertz - Butler PA
Joseph A. Pesavento - Pittsburgh PA
John F. Reuther - Pittsburgh PA
James J. Shields - Philadelphia PA
Robert A. Yannone - Aldan PA

Westinghouse Electric Corp. - Pittsburgh PA

F02C 910, F02C 902

60 3925

A local maintenance controller permits continued power generation during maintenance or failure of a primary gas turbine control system by manually for maintenance purposes or automatically for failure purposes assuming turbine control to thereby insure continued operation. The local maintenance controller set forth is particularly suitable for use in conjunction with a computer implemented gas turbine control system. Transfer between the local maintenance controller and the primary control system is effected in a bumpless manner so that load swings are absent. However, if the turbine was operating at system reserve at the time of transfer, the local maintenance controller reduces the load to peak value until primary control is resumed. Operation at any other load at the time of transfer is maintained by the controller. Transfer back to primary control is also effected in a bumpless manner.

4167096, Sep 11, 1979

Aug 8, 1974

5/495739

Jack R. Smith - Pittsburgh PA
Terry J. Reed - North Huntingdon PA

Westinghouse Electric Corp. - Pittsburgh PA

F02C 904

60 3928R

A combined cycle electric power plant includes gas and steam turbines and steam generators and a digital/analog control system. In the automatic and manual modes of operation, the control system develops a fuel reference signal for the throttle valve position control by means of a speed/load control which functions on a feedforward speed control basis without speed feedback correction. An electrical overspeed protection control is directly coupled to the throttle valve position control to limit turbine speed to a first reference value when the breaker is closed and to limit turbine speed to a lower reference value when the breaker is open. Electrical and mechanical overspeed protection systems directly trip the turbine at higher speed references.

3978659, Sep 7, 1976

Feb 19, 1975

5/551203

Jack R. Smith - Pittsburgh PA
Leonard H. Burrows - Gibsonia PA

Westinghouse Electric Corporation - Pittsburgh PA

F02C 908

60 3928R

A backup control system for a gas turbine power plant having a computer implemented primary control system is disclosed. Bumpless transfer between the two control systems is effected by tracking a plurality of control signals generated by each control system, the signals being functionally identical, but independent. After comparison of the functionally identical signals, transfer between the two control systems is permitted only if any tracking error does not exceed a permissible deadband margin. The presence of tracking error is also utilized to generate a signal which is employed to operate panel mounted signal means, which panel can thereby be used as a diagnostic tool in monitoring the health of both the primary and backup systems. Transfer reliability is thereby enhanced and turbine availability improved.

4029952, Jun 14, 1977

Nov 6, 1973

5/413275

Theodore C. Giras - Pittsburgh PA
William E. Mendez - Murrysville PA
Jack R. Smith - Pittsburgh PA

Westinghouse Electric Corporation - Pittsburgh PA

F01D 1702, G05B 1500, G06F 1506

23515121

The 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.

3974645, Aug 17, 1976

Aug 8, 1974

5/495731

Jack R. Smith - Pittsburgh PA

Westinghouse Electric Corporation - Pittsburgh PA

F02C 914

60 3929

A combined cycle electric power plant including gas and steam turbines, steam generators, afterburners and a digital/analog control system is provided with inlet guide vane control apparatus adapted to match gas turbine exhaust flow to the requirements of the steam generator with which it is associated. The guide vane control apparatus operates to limit the inlet guide vane position as a function of gas turbine compressor inlet temperature in accordance with a desired gas turbine exhaust flow at predetermined operating conditions.