Method of controlling two-stage hydraulic pump-turbines

Details Method of controlling two-stage hydraulic pump-turbines Method of controlling two-stage hydraulic pump-turbines

1980-08-25

1982-08-17

Casaregola, Louis J.

Rotary kinetic fluid motors or pumps

Method of operation

415 24, 415500, F01B 1714

Patent

active

043447350

ABSTRACT:
A method of controlling a two-stage hydraulic pump-turbine, rotating at a constant speed under a steady condition, in which high and low pressure stages are connected through a return passage. The variable degrees of openings of movable guide vanes of the high and low pressure stages are equally controlled to the same extent when the hydraulic pump-turbine operates as a pump and independently controlled to the different extents when the pump-turbine operates as a turbine in accordance with a change of an operational condition such as water level or load at a time of the steady operation.

REFERENCES:
patent: 4255078 (1981-03-01), Tsunoda et al.
patent: 4280788 (1981-07-01), Tsunoda et al.

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