Automatic control system for controlling the output power of a p

Details Automatic control system for controlling the output power of a p Automatic control system for controlling the output power of a p

1987-01-28

1988-05-24

Shoop, Jr., William M.

Prime-mover dynamo plants

Electric control

Engine control

290 51, F01D 1704

Patent

active

047468076

ABSTRACT:
An automatic control system for a power plant including a torque such as a steam turbine and a generator for converting the generated torque into electrical output. The control system comprises a torque controller such as a steam control valve for adjusting the amount of torque generation for controlling the amount of power generation, an output signal target setter which sets the target of torque output necessary for a certain electrical output and provides an output signal, a comparator which compares an actual output to a power system connected to the power plant with the target, a command output setter which cuts the command output provided by the comparator to the torque controller at an upper setup level and lower setup level of the system frequency and validates the command output only when the system frequency is within the range, and a power generation controller which receives a torque down command produced by the comparator when the actual output is larger than the setup target and a torque up command produced when the actual output is smaller than the preset target only when the system frequency is within the range as set by the command output setter and provides a control signal to the torque controller.

REFERENCES:
patent: 3986788 (1976-10-01), Rossi
patent: 4005581 (1977-02-01), Aanstad
patent: 4039846 (1977-08-01), Vance
patent: 4120159 (1978-10-01), Matsumoto et al.
patent: 4653276 (1987-03-01), Sugano et al.
Kansai Electric Power Co., Inc., "Standard Specifications For Automatic Load Regulators", Dec. 5, 1984, pp. 47-48.

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