초록 ▼

A method of and system for controlling a hydraulic turbine including a variable throttle valve located in fluid channel upstream or downstream of the hydraulic turbine adapted to be closed simultaneously as guide vanes of the hydraulic turbine are closed at a velocity higher than a predetermined vel

A method of and system for controlling a hydraulic turbine including a variable throttle valve located in fluid channel upstream or downstream of the hydraulic turbine adapted to be closed simultaneously as guide vanes of the hydraulic turbine are closed at a velocity higher than a predetermined velocity. The variable throttle valve is closed to a certain degree of opening in response to the sudden closing action of the guide vanes, but slowly opened to an original full open position after the guide vanes has closed to a predetermined degree of opening.

대표청구항 ▼

A method of controlling a hydraulic turbine during its operation in a system including an upper water reservoir, a lower water reservoir, a water channel connecting the upper reservoir and the lower reservoir together, a hydraulic turbine connected in the water channel to be operated by the water pa

A method of controlling a hydraulic turbine during its operation in a system including an upper water reservoir, a lower water reservoir, a water channel connecting the upper reservoir and the lower reservoir together, a hydraulic turbine connected in the water channel to be operated by the water passing through the channel and the turbine including guide vanes to control the quantity of water passing through the turbine to thereby control the operation of the turbine, and a load to be powered by the turbine wherein such method comprises the steps of: drivingly connecting the turbine to the load; passing water through the turbine under the control of the guide vanes to operate the turbine and thereby drive the connected load; sensing a change in the load while the operating turbine is driving the load; adjusting the guide vanes in response to the sensed change in load to thereby correspondingly adjust the flow of the water through the turbine in accordance with the change in the load, which adjusting the guide vanes produces a corresponding change in pressure on the upstream side of the turbine in the water channel and on the downstream side of the turbine in the water channel; providing a control signal correlated to the adjusting rate of the guide vanes and rate of pressure changes in the water channel caused thereby; throttling the water flowing in the water channel at a distance spaced serially in the water channel from the turbine and at a rate correlated to the rate of the guide vanes, only when the control signal indicates an adjusting rate of the guide vanes that is higher than a reference rate, so that said throttling is automatic and simultaneous with said adjusting and said throttling will reduce the severity of the pressure change within the water channel on the side of the turbine in common with the throttling; and discontinuing said throttling in response to the signal indicating an adjusting rate of the guide vanes lower than a reference rate.