Measuring transducer currents in a wind turbine generator
AssigneeVestas Wind Systems A/S
InventorsKarl Axel Pétursson, Lars Rohrmann Andersen, John Bengtson
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Abstract
A method of measuring transducer currents in a wind turbine generator control system is described. The method comprises selectively activating a set of one or more transducers in a group of transducers, taking a first measurement of the current through the group of transducers, selectively activating a different set of one or more transducers in the group of transducers, and taking a second measurement of the current through the group of transducers.
Claims8
A method of measuring transducer currents in a wind turbine generator control system, the method comprising:
- selectively activating, via switching circuitry, a first set of one or more transducers in a group of transducers, wherein the switching circuitry comprises an output to each transducer of the group of transducers;
- taking, via a current measurement device connected to an input of the switching circuitry, a first measurement of current through the group of transducers;
- selectively activating, via the switching circuitry, a second set of one or more transducers in the group of transducers;
- and
- taking, via the current measurement device, a second measurement of the current through the group of transducers.
A diagnostic apparatus for measuring transducer currents in a wind turbine generator control system, the apparatus comprising:
- switching circuitry comprising an output to each transducer in a group of transducers;
- and
- a current measurement device connected to an input of the switching circuitry, wherein the switching circuitry is configured to:
- selectively activate a first set of one or more of the transducers in the group of transducers, wherein the current measurement device takes a first measurement of current through the group of transducers while the first set of transducers is activated;
- and
- selectively activate a second set of one or more transducers in the group of transducers, wherein the current measurement device takes a second measurement of current through the group of transducers while the second set of transducers is activated.
A system, comprising:
- a wind turbine, comprising:
- a tower;
- a nacelle disposed on the tower;
- a generator disposed in the nacelle;
- a generator control system communicatively connected to the generator;
- a rotor mechanically coupled to the generator at a first end of the rotor;
- a plurality of blades coupled to a second end of the rotor;
- and
- a diagnostic apparatus for measuring transducer currents in the generator control system, the diagnostic apparatus comprising:
- switching circuitry, for selectively activating and deactivating transducers in a group of transducers;
- and
- a current measurement device, for measuring the current through the group of transducers;
- wherein:
- the switching circuitry is configured to selectively activate a first set of one or more of the transducers in the group, whereupon the current measurement device takes a first measurement of the current through the group of transducers while the first set of transducers is activated;
- and
- the switching circuitry is further configured to selectively activate a second, different, set of one or more transducers in the group of transducers, whereupon the current measurement device takes a second measurement of the current through the group of transducers while the second set of transducers is activated.
Dependencies are inferred from the claim text.