51
Patrick March, Frank Adkins, R Keith Jones, Paul J Wolff: Method and apparatus for monitoring hydroelectric facility performance costs. Tennessee Valley Authority, Foley & Lardner, September 14, 1999: US05953227 (8 worldwide citation)

A method and system are provided for monitoring performance parameters of a hydroelectric power generation facility and determining economic impact of operating the facility at levels other than predetermined reference levels. Optimal or desired levels of parameters of interest are stored in a memor ...


52
Simon Srybnik, Louis Srybnik: Hydro-electric power generating system with an adjustable water diversion system. June 17, 2008: US07388302 (7 worldwide citation)

A hydroelectric power plant for use in flowing bodies of water is described which includes a new spillway canal constructed to enhance the flow of water by increasing the water pressure. Because the canal has the angled feature on both ends, the water flow can be enhanced when backflow conditions ex ...


53
Arthur F Johnson: Method of producing hydroelectric power. Energy Conversation Partnership, Pennie & Edmonds, October 31, 1995: US05461858 (7 worldwide citation)

A process of converting steam to hydro-electric power through a process of allowing steam to displace water from a tank for operating a turbine or pelton wheel. The tank includes a lightweight float of a small enough size to prevent the steam from mixing with the water below it, but to allow water t ...


54
Patrick March: Method and apparatus for monitoring a hydroelectric facility trash rack. Tennessee Valley Authority, Foley & Lardner, September 1, 1998: US05800077 (7 worldwide citation)

A system is provided for monitoring fouling of a trash rack for a hydroelectric power generation facility. The trash rack monitoring system includes sensors for detecting head upstream and downstream of a trash rack as well as the flow through an inlet conduit downstream of the rack. The head and fl ...


55
Richard K Fisher Jr, Ronald E Deitz: Control system for enhancing fish survivability in a hydroelectric power generation installation. Voith Hydro, Foley & Lardner, March 14, 2000: US06038494 (7 worldwide citation)

A system for controlling a hydroelectric power production facility includes sensors for detecting the presence of fish adjacent to the facility. A controller linked to the sensors controls the orientation of control surfaces associated with a turbine/generator set to enhance the survivability of fis ...


56
Mitsuhashi Yoshiyasu: Water turbine. Tokyo Shibaura Denki Kabushiki Kaisha, Stevens Davis Miller & Mosher, December 23, 1975: US3927951 (7 worldwide citation)

In a water turbine for use in a pumping-up type hydroelectric power station wherein pressurized air is introduced into the turbine chamber when starting the turbine as a pump and then the air is discharged through an annular chamber about the turbine shaft, the annular chamber is divided into upper ...


57
Kenneth R Broome: Undershot impulse jet driven waterwheel having an automatically adjustable radial gate for optimal hydroelectric power generation and water level control. Michael Hetherington, March 17, 2009: US07503744 (7 worldwide citation)

A low-head impulse jet waterwheel for power generation at irrigation canal drop structures and navigation dam spillways achieves renewable electric power generation that has been lost until now due to lack of suitable equipment to convert such energy at competitive cost. Conventional practice has li ...


58
Runkle Mark Andrew, Mclaren Donald Gordon, Ardley Glenn Henry, Larsen Einar Vaugh, Weeber Konrad: Asynchronous conversion method and apparatus for use with variable speed turbine hydroelectric generation. Gen Electric, October 15, 1997: EP0800616-A1 (7 worldwide citation)

A hydroelectric power generation system (20) generates electrical power for an electrical utilization system (72). A controller (42) obtains a requested output electrical power level from a hydro-turbine unit (70) by using a signal indicative of water head (hmeas) to control speed of an asynchronous ...


59
Runkle Mark Andrew: Asynchronous conversion method esp. for variable speed hydroelectric turbine.. Gen Electric, April 30, 1998: FR2755319-A1 (7 worldwide citation)

A hydroelectric power generation system (20) feeds electrical utility system (72). A controller (42) obtains signal from water head transducer (25) and requested electrical output power from hydro-turbine (70) to regulate the speed of an asynchronous rotary converter (50) coupled to the hydro-turbin ...


60
John M Nestler, James L Pickens, Jim Evans, Richard W Haskins: Multiple sensor fish surrogate for acoustic and hydraulic data collection. U S Army Corps of Engineers represented by the Secretary of the Army, Luther A Marsh, May 14, 1996: US05517465 (7 worldwide citation)

Acoustic signals and hydraulic pressure variations which influence fish bvior in bodies of water are measured and recorded by apparatus simulating a fish immersed in water, fitted with piezoelectric transducers and connected by wiring to remote amplifying and recording means. Such data are correlate ...