Heating circuit for a heating system of a wind turbine and methods of operating same

A heating system, comprising:

• at least one heating element;
• and
• a heating circuit electrically coupled to the at least one heating element, the heating circuit configured to perform a plurality of operations, the plurality of operations comprising:
• receiving a voltage signal from the electrical grid;
• processing the voltage signal, wherein processing the voltage signal comprises superimposing a pulse width modulation (PWM) signal onto the voltage signal;
• providing continuous temperature control to the at least one heating element via the PWM signal;
• and
• maintaining a temperature of the at least one heating element within a temperature range using the PWM signal to minimize temperature cycling of the at least one heating element.

A wind turbine connected to an electrical grid, the wind turbine comprising:

• a tower;
• a nacelle mounted atop the tower;
• a rotatable hub mounted to the nacelle, the rotatable hub having at least one rotor blade mounted thereto;
• a heating system for mitigating ice on the wind turbine, comprising:
• at least one heating element arranged with the at least one rotor blade;
• and
• a heating circuit electrically coupled to the at least one heating element, the heating circuit configured to perform a plurality of operations, the plurality of operations comprising:
• receiving a voltage signal from the electrical grid;
• processing the voltage signal, wherein processing the voltage signal comprises superimposing a pulse width modulation (PWM) signal onto the voltage signal;
• providing continuous temperature control to the at least one heating element via the PWM signal;
• and
• maintaining a temperature of the at least one heating element within a temperature range using the PWM signal during operation of the wind turbine to minimize temperature cycling of the at least one heating element.