Method of operating an electrical heating element
AssigneeNordex Energy GmbH
InventorKonrad Sachse
Life of this patent
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Abstract
A method is for operating an electrical heating element of a wind turbine rotor blade. The method includes: applying a voltage to the heating element, measuring a current flowing through the heating element, measuring the voltage applied to the heating element, calculating a reference current by applying a normalization factor to the measured current, wherein the normalization factor corresponds to the ratio of a nominal voltage to the measured voltage, triggering an action when the reference current is outside a first predetermined reference current range.
Claims20
A method of operating an electrical heating element of a wind turbine rotor blade, the method comprising:
- applying a voltage to the heating element;
- measuring a current flowing through the heating element;
- measuring the voltage applied to the heating element;
- calculating a reference current by applying a normalization factor to the measured current, wherein the normalization factor corresponds to the ratio of a nominal voltage to the measured voltage;
- and,
- triggering an action when the reference current is outside a first predetermined reference current range.
A wind turbine comprising:
- a wind turbine rotor blade having an electrical heating element;
- a controller configured to apply a voltage to the heating element;
- a current meter configured to measure a current flowing through said heating element;
- a voltage meter configured to measure the voltage applied to said heating element;
- and,
- said controller being further configured to calculate a reference current by applying a normalization factor to the measured current, wherein the normalization factor corresponds to a ratio of a nominal voltage to the measured voltage, and to trigger an action when said reference current is outside a first predetermined reference current range.
Dependencies are inferred from the claim text.