Water current power generation systems

A water current power generating system, comprising:

• a support structure for locating on a bed of a body of water;
• a water current turbine device mounted on the support structure, the water current turbine device comprising a main body and a rotor assembly rotatably mounted to the main body;
• a measurement unit operable to determine operating information relating to operation of the system, the operating information comprising operating condition information relating to a plurality of operation conditions of the system, the plurality of operating conditions comprising, at least, an inclination of the main body of the turbine device with respect to the support structure, the measurement unit receiving, at least, the inclination of the main body as measured by an inclinometer of the system;
• and
• a controller operable to determine loading on the system based on the inclination of the main body, and to adjust a controlled parameter of the system such that loading on the system falls below a predetermined threshold value,
• wherein the measurement unit and the controller are housed within the main body;
• and
• the controller is operable to store, in advance of power generating operation of the system, load model information relating to expected loading on the system during such operation, wherein the controller is operable to combine the operating information and the load model information to generate expected loading information.