Abstract: An underwater power generating system includes an underwater power generating device, a closed nacelle and a connecting cable system that is provided with an open passage way extending there along that is sealed at one end to the interior of the closed nacelle. The cable system can be used in a number of ways, such as by having the second end being sealed, to prevent air from escaping the closed nacelle, or by having the second end connected to a source of positive pressure thereby permitting the cable to be sufficiently pressurized to provide a positive pressure internally within the closed nacelle that is at least slightly greater than the nacelle at depth pressure, and thus greater than water pressure acting on the exterior of the closed nacelle, to prevent water ingress within the nacelle, as well as to transmit power and/or other data between the nacelle and shore monitoring and control facilities.

Abstract: An apparatus and method for mounting underwater turbines that includes a mechanism for correcting tilt error, including both the amount and direction of error, associated with the installation of underwater turbines onto anchoring or mounting structures so that the yaw axis of the mounted turbines will be as close as possible to a desired angle, preferably vertical.

Abstract: In a power generating system the remanent voltage of an induction machine is measured. The frequency of the remanent voltage is compared to a predetermined threshold. When the frequency of the remanent voltage is greater than the predetermined threshold the induction machine is connected to the power grid. Induction machine is disconnected from power grid once generated power drops below a predetermined threshold. Once the induction machine is disconnected, it is prevented from being reconnected to the power grid until a predetermined time period elapses.

Abstract: This relates to a modified turbine blade tip design using a fairing shaped design that increases the tip area efficiency of a kinetic hydropower turbine rotor blade while having a non-fouling characteristic and a tip design with the ability to shed weeds, debris, or other submerged materials that might have fouling potential.

Abstract: A rotor hub mounting arrangement for removably mounting a plurality of turbine rotor blades to the rotor hub in a compact and secure manner. The rotor hub includes an internal mounting assembly, preferably comprised of a series of interconnected mounting plates, positioned adjacent a series of foil shaped openings in the rotor hub into which the root end of turbine blades can be inserted and removably mounted to the internal mounting assembly.

Abstract: In a power generating system the remanent voltage of an induction machine is measured. The frequency of the remanent voltage is compared to a predetermined threshold. When the frequency of the remanent voltage is greater than the predetermined threshold the induction machine is connected to the power grid. Induction machine is disconnected from power grid once generated power drops below a predetermined threshold. Once the induction machine is disconnected, it is prevented from being reconnected to the power grid until a predetermined time period elapses.

Abstract: A power generation flume for use with fluid or water flow channels that includes an acceleration zone where a power generation system can be used in an accelerated flow to generate power in a cost efficient manner. The flume can have a variety of dimensions and can be used at one or at multiple locations along or across the flow channel without effecting upstream flow conditions.

Abstract: An underwater power generating system includes an underwater power generating device, a closed nacelle and a connecting cable system that is provided with an open passage way extending there along that is sealed at one end to the interior of the closed nacelle. The cable system can be used in a number of ways, such as by having the second end being sealed, to prevent air from escaping the closed nacelle, or by having the second end connected to a source of positive pressure thereby permitting the cable to be sufficiently pressurized to provide a positive pressure internally within the closed nacelle that is at least slightly greater than the nacelle at depth pressure, and thus greater than water pressure acting on the exterior of the closed nacelle, to prevent water ingress within the nacelle, as well as to transmit power and/or other data between the nacelle and shore monitoring and control facilities.

Abstract: This relates to a modified turbine blade tip design using a fairing shaped design that increases the tip area efficiency of a kinetic hydropower turbine rotor blade while having a non-fouling characteristic and a tip design with the ability to shed weeds, debris, or other submerged materials that might have fouling potential.

Abstract: An apparatus and method for mounting underwater turbines that includes a mechanism for correcting tilt error, including both the amount and direction of error, associated with the installation of underwater turbines onto anchoring or mounting structures so that the yaw axis of the mounted turbines will be as close as possible to a desired angle, preferably vertical.

Abstract: A power generation flume for use with fluid or water flow channels that includes an acceleration zone where a power generation system can be used in an accelerated flow to generate power in a cost efficient manner. The flume can have a variety of dimensions and can be used at one or at multiple locations along or across the flow channel without effecting upstream flow conditions.

Abstract: We describe a cantilevered power generation system and the support therefor which permits the system to be easily mounted to a fixed shore line or water way so that a vertically oriented rotor can be positioned in the moving flow and be rotted to generate power. The support structure allows the power generation system to be easily removed, moved and also allow the structure to be raised thus permitting the repair and/or replacement of the rotor assembly.