A wind energy system, in particular an offshore wind energy system, comprising: - a plurality of wind turbines (104.1, 104.2, 104.3, 104.4) connected to at least one cable network, - wherein the cable network is configured to transmit the electrical power fed-in by the connected wind turbines (104.1, 104.2, 104.3, 104.4), - at least one control apparatus (110, 210, 310) configured to control the power fed into the cable network by at least one of the wind turbine (104.1, 104.2, 104.3, 104.4) by providing at least one power set point, wherein - at least one temperature detecting device (109, 209) is provided, configured to detect the temperature of the cable network, - at least one condition detecting device (111, 211) is provided, configured to detect the condition of the wind energy system, and - the control apparatus (110, 210, 310) comprises at least one control device (113, 213, 313) configured to determine the power set point based on the detected temperature and the detected condition, characterized in that - the condition detecting device (111, 211) comprises at least one switching condition evaluating module configured to determine the electrical topology of the wind power system based on the switching states of a plurality of electrical switching devices of the wind power system, - the control device (113, 213, 313) is configured at least to determine the power set point based on the determined electrical topology of the wind power system, - the condition detecting device (111, 211) is configured to provide a thermal model of the electrical topology of the wind energy system, and - the control device (113, 213, 313) is configured at least to determine the power set point based on the provided thermal model. - a plurality of wind turbines (104.1, 104.2, 104.3, 104.4) connected to at least one cable network, - wherein the cable network is configured to transmit the electrical power fed-in by the connected wind turbines (104.1, 104.2, 104.3, 104.4), - at least one control apparatus (110, 210, 310) configured to control the power fed into the cable network by at least one of the wind turbine (104.1, 104.2, 104.3, 104.4) by providing at least one power set point, - at least one temperature detecting device (109, 209) is provided, configured to detect the temperature of the cable network, - at least one condition detecting device (111, 211) is provided, configured to detect the condition of the wind energy system, and - the control apparatus (110, 210, 310) comprises at least one control device (113, 213, 313) configured to determine the power set point based on the detected temperature and the detected condition, - the condition detecting device (111, 211) comprises at least one switching condition evaluating module configured to determine the electrical topology of the wind power system based on the switching states of a plurality of electrical switching devices of the wind power system, - the control device (113, 213, 313) is configured at least to determine the power set point based on the determined electrical topology of the wind power system, - the condition detecting device (111, 211) is configured to provide a thermal model of the electrical topology of the wind energy system, and - the control device (113, 213, 313) is configured at least to determine the power set point based on the provided thermal model.