Pierre Cros: System for converting the randomly variable energy of a natural fluid. Spie Batignolles, Societe Generale de Techniques et d Etudes, Young & Thompson, April 10, 1979: US04149092 (85 worldwide citation)

Emitters and rotary hydraulic displacement pumps are associated with one or a number of propeller-type transducers and connected to receivers each having a rotary hydraulic displacement motor coupled to an alternator. The emitters are connected to the receivers by means of a hydraulic circuit for an ...

Michael L Haining: Ocean current power generator. Richard L Moseley, August 8, 1995: US05440176 (82 worldwide citation)

An hydroelectric power plant is disclosed which comprises several combination turbine/generators which are suspended into an ocean current from a submerged tension leg type platform. Each of the turbine/generators are independently positionable horizontally, vertically and azimuthally to take the be ...

Runkle Mark Andrew, Ardley Glenn Henry, Mclaren Donald Gordon, Larsen Einar Vaugh, Weeber Konrad: Asynchronous conversion method and apparatus for use with variable speed turbine hydroelectric generation. Gen Electric, October 23, 1996: EP0739087-A2 (49 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 asynchrcnous ...

Patrick A March: Method and apparatus for monitoring hydroelectric facility maintenance and environmental costs. Hydro Resource Solutions, Foley & Lardner, December 3, 2002: US06490506 (49 worldwide citation)

A system for monitoring maintenance information in a hydroelectric power generation facility comprises sensors coupled to a controller. The sensors detect actual levels of operating parameters for a desired operating period at an operating condition. The detected parameters include a stressor capabl ...

Paul H F Merswolke, Thomas B Gardner: Wind powered hydroelectric power plant and method of operation thereof. New World Generation, Daryl W Schnurr, April 13, 2004: US06718761 (48 worldwide citation)

A hydroelectric power plant uses a plurality of windmills connected to compressed air generators to produce pressurized air. Pressurized air is used to drive water through a turbine to produce electrical power. The water is recycled and the power plant includes reserve pressurized air tanks to allow ...

Nikolaes A Nalbandyan, Grigor A Nalbandyan, Harutyun G Nalbandyan: Portable hydroelectric power unit. Ladas & Parry, March 28, 1989: US04816697 (42 worldwide citation)

The present apparatus is a hydroelectric power device for generating energy from currents of water. It includes a blade spiraling about a spindle or shaft which is connected to a generator. The rotation of the blade and shaft is converted by the generator into energy.

Gerald G Martin: Method and apparatus for generating hydro-electric power. Richard C Litman, August 1, 2006: US07084521 (38 worldwide citation)

A hydroelectric power generating method and/or apparatus provides one or more inlet pipes perpendicular to a flow of water in a stream or river. The inlet pipes have a length and plural apertures along the length of the at least one inlet pipe. A feedline and a turbine generator combination are inte ...

Mohammad A Ali, George V Cotroneo, Peter R Rodrigue, Robert T Smith: Control system for run-of-river hydroelectric plant. Acres International Corporation, Christel Bean & Linihan, June 23, 1987: US04674279 (38 worldwide citation)

A control system for a hydroelectric power plant of the run-of-river type wherein the load on the turbine-generator units is matched to the flow of the river so that the units operate at the maximum head available for existing flow conditions to produce the maximum energy available from the river fl ...

Marco Maiwald, Bertram Kurt Müller: Hydrogen production from hydro power. Voith Siemens Hydro Power Generation & Co KG, Voith Siemens Hydro Power Generation, Foley & Lardner, January 11, 2005: US06841893 (37 worldwide citation)

A method is provided for operating a hydroelectric power generating facility configured for operating in first and second operating modes. The facility includes a turbine driven power generating unit receiving a flow of water through an upstream conduit to generate electrical power. The method compr ...

George Parker Sr: Submerged hydroelectric power generation. G Turner Moller, June 16, 1981: US04274009 (37 worldwide citation)

Electric power is generated by power generators submerged to a substantial depth in a body of moving water. The generators are housed in bodies configured to create a large pressure differential across a conduit. This generates a rapid, substantial flow of water through a conduit in which is located ...