A method of controlling an electrical power network in which a sudden event which may lead to loss or excess of generation or load. The electrical power network comprises plural controllers, each controller configured to control an apparatus connected to the power network at a different respective location in the electrical power network. The method comprises determining the occurrence of the sudden and receiving synchronised quantities in each of the controllers each of the quantities corresponding to one of frequency and angle at respective different locations in the electrical power network. The method further comprises generating a control output from each controllers in dependence on the received plural quantities, each control output controlling its respective apparatus, each controller generating the control output independent of operation of any other controller and on an ongoing basis in dependence on ongoing receipt of the plural quantities.
H02J 3/00 - Circuit arrangements for ac mains or ac distribution networks
H02J 13/00 - Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the networkCircuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
G05B 19/042 - Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
H02J 3/24 - Arrangements for preventing or reducing oscillations of power in networks
A water current power generating system includes a support structure located on a bed of a body of water. A power generating apparatus, such as a water current turbine device, is mounted on the support structure, by way of a mounting portion. The system also includes a measurement unit operable to determine operating information relating to operation of the system, and a controller operable to determine loading on the system from such operating information, and to adjust a controlled parameter of the system such that loading on the system falls below a predetermined threshold value.
A connection system for connecting a first connection point with a second connection point, the second connection point being arranged for rotation and translation with respect to the first connection point, the connection system includes a first connection point, a first support surface moveable linearly with respect to the first connection point, a second support surface moveable linearly and rotationally with respect to the first connection point, and a second connection point moveable linearly and rotationally with respect to the first connection point, moveable rotationally with respect to the first support surface, and fixed with respect to the second support surface, and a reverse bend radius cable chain located on the first and second support surfaces, and having a first end connected with the first connection point via a first connector cable, and a second end connected with the second connection point via a second connector cable.
F03B 13/10 - Submerged units incorporating electric generators or motors
F03B 13/26 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy using tide energy
An infrastructure arrangement for use in an underwater power generation installation includes a support structure adapted for engagement with a bed of a body of water, and an infrastructure module adapted to house infrastructure equipment for connection to power generating units of the installation. The infrastructure module is releasably engageable with the support structure.
F03B 13/10 - Submerged units incorporating electric generators or motors
F03B 13/26 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy using tide energy
F03B 17/06 - Other machines or engines using liquid flow, e.g. of swinging-flap type
An underwater structure includes a power generation unit, which includes a main body, a mounting portion which extends from the main body and which defines a mounting axis, and a support structure adapted for engagement with a bed of a body of water, and support housing. The mounting portion defines a substantially continuous mounting surface which extends substantially completely around the mounting portion, and the support housing defines a substantially continuous support surface which extends substantially completely around the support housing. The mounting surface and support surface are arranged to abut one another substantially continuously when the power generation unit is mounted on the support structure. The mounting portion and the support housing are adapted to cooperate with one another for mounting of the power generation unit on the support structure in any polar orientation about the mounting axis.
F03B 13/10 - Submerged units incorporating electric generators or motors
F03B 13/26 - Adaptations of machines or engines for special useCombinations of machines or engines with driving or driven apparatusPower stations or aggregates characterised by using wave or tide energy using tide energy
F03B 17/06 - Other machines or engines using liquid flow, e.g. of swinging-flap type
An underwater structure includes a power generation apparatus and a supporting structure. A coupling is provided that allows attachment of the power generating device to the submerged support structure. The coupling incorporates the function of a yaw bearing allowing rotation of the power generating apparatus about a substantially vertical axis.
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