The invention provides a computer-implemented method of controlling operation of a wind turbine in which a plurality of wind turbine zones are defined. The method comprises, for each of the plurality of wind turbine zones: receiving sensor data from at least one electromagnetic radiation sensor arranged to monitor the respective wind turbine zone; and, determining, based on the received sensor data, whether one or more people are in the respective wind turbine zone. The method comprises selecting an operational mode of the wind turbine based on the determination as to which of the plurality of zones have one or more people therein, and controlling the wind turbine to operate in the selected operational mode.

A lock-out tag-out (LOTO) device comprising a handle including at least first and second holes; a pipe configured to maintain an object to be locked in a locked condition; a rod configured to be received within the first hole of the handle and be received within the pipe, the rod including a hole; a locking pin configured to be received within both the second hole of the handle and the hole of the rod to secure the rod in position relative to the handle, the locking pin including one or more holes configured to receive one or more separate LOTO locks.

A wind turbine tower elevator with tower belt includes a first tower rail, a second tower rail, an elevator, a first jacking system, a second jacking system, a first locking system, a second locking system, and a multi-section belt. The first tower rail and the second tower rail guide the movement of the elevator along a wind turbine tower. The elevator facilitates the transportation of turbine blades and the nacelle. The elevator also retains the first jacking system, the second jacking system, the first locking system, and the second locking system. The first jacking system and the second jacking system enable the movement of the elevator along the wind turbine tower. The first locking system and the second locking system secure the elevator in place at the desired location along the wind turbine tower. The multi-section belt secures the elevator to the wind turbine tower and guides the elevator movement.

The invention provides a computer-implemented method of controlling operation of a wind turbine in which a plurality of wind turbine zones are defined. The method comprises, for each of the plurality of wind turbine zones: receiving sensor data from at least one electromagnetic radiation sensor arranged to monitor the respective wind turbine zone; and, determining, based on the received sensor data, whether one or more people are in the respective wind turbine zone. The method comprises selecting an operational mode of the wind turbine based on the determination as to which of the plurality of zones have one or more people therein, and controlling the wind turbine to operate in the selected operational mode.

A method of disengaging a rotor-lock of a wind turbine, the rotor comprising one or more blades, which due to the gravitational pull, generates a rotor torque which is opposed by a rotor-lock counter-torque from the rotor-lock, the method comprising: a) determining a direction of the rotor torque with a sensor system; b) applying a rotor-drive counter-torque to the rotor with a rotor-drive system, wherein the rotor-drive counter-torque acts to oppose the determined rotor torque and causes the rotor-lock counter-torque to reduce; c) during or after the application of the rotor-drive counter-torque, disengaging the rotor-lock mechanism; wherein the step of determining a direction of the rotor torque comprises applying a torque restriction to the rotor-drive based on the determined direction of the rotor torque, the torque restriction preventing the application of torque to the rotor by the rotor-drive system in the same direction as the rotor torque.