Rotary kinetic fluid motors or pumps – With control means responsive to non-cyclic condition... – Plural diverse condition responsive
Patent
1994-11-21
1995-12-05
Look, Edward K.
Rotary kinetic fluid motors or pumps
With control means responsive to non-cyclic condition...
Plural diverse condition responsive
415 24, 415148, 60325, 60398, F01B 2500, F01D 1700
Patent
active
054723124
ABSTRACT:
A water level regulating system controlling the water level of a head tank of each of a plurality of hydroelectric plant installed in cascade along a stream by using an opening of guide vanes of a hydraulic turbine as a manipulated variable, and the water level of the head tank as a controlled variable. Each hydroelectric plant has a water level regulator constituting the water level regulating system. Each of the water level regulator of an upstream hydroelectric plant and the water level regulator of a downstream hydroelectric plant has a device varying PID parameters for controlling the water level in accordance with the opening of the guide vanes, and a device varying a reference water level to a set water level. The downstream water level regulator further includes a feedforward compensating element which compensates a feedforward signal corresponding to the opening of the guide vanes of the upstream hydroelectric plant, and which varies its compensation characteristic by the opening of the guide vanes of the downstream hydroelectric plant.
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S. Endo et al., "Water Passage Simulator and Reservoir Control Method to Small Hydroelectric Power Plant", Shinko Electric Co. Ltd., pp. 77-85, Nov. 1982.
Kurotani Kenichi
Takeda Kenzo
Fuji Electric & Co., Ltd.
Look Edward K.
Nguyen Hoang
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