Patent ID: 8672625

Claim:
Wind turbine comprising: a rotor with at least two blades, each of which is provided with at least one inclinometer arrangement with at least two axes, and an evaluating unit in communication with the at least one inclinometer arrangement of each blade and that determines at least one of bending and twisting of the blades relative to a longitudinal axis of the blade from signals transmitted by the at least one inclinometer arrangement of each blade during operation; wherein each of the rotor blades has at least one liquid tank and at least one liquid reservoir, and further comprising a liquid transfer mechanism which transfers liquid between the at least one liquid reservoir and the at least one liquid tank in response to determined imbalance of the rotor detected during rotation of the rotor, the transfer mechanism being operative for transferring liquid from at least one tank during rotation in a manner acting to continuously minimize the imbalance determined.