Controlling operation in different zones of a wind turbine

A control system for controlling operation of a wind turbine in which a plurality of wind turbine zones are defined, the control system comprising:

• for each of the plurality of wind turbine zones, at least one electromagnetic radiation sensor arranged to monitor the respective wind turbine zone;
• and,
• a controller comprising:
• an input configured to receive sensor data from the electromagnetic radiation sensors;
• a processor configured to:
• for each of the plurality of wind turbine zones,
• using the received sensor data, determine whether one or more people are in the respective plurality of wind turbine zones;
• and,
• control the wind turbine to operate in a first operational mode when it is determined that one or more people are in at least one of the plurality of wind turbine zones, the first operational mode configured such that no electrical power is being produced by the wind turbine, and
• control the wind turbine to operate in a second operational mode when a change is determined from one or more people being in at least one of the plurality of wind turbine zones to no people being in any of the plurality of wind turbine zones, the second operational mode being configured such that the wind turbine generates electrical power;
• and
• an output configured to transmit a control signal to control the wind turbine to operate in the first or second operational mode.