DEVICE AND METHOD FOR DETECTING CROWBAR CIRCUIT IN WIND TURBINE
First Claim
1. A method for detecting a crowbar circuit in a wind turbine, wherein the wind turbine comprises a converter electrically connected to the crowbar circuit, wherein the method comprises:
- electrically coupling a detection module to the crowbar circuit;
inputting a first control signal into the crowbar circuit, so as to turn on the crowbar circuit;
providing a three-phase voltage signal to the crowbar circuit via the converter, wherein voltage signals in two adjacent phases has a predetermined phase angle difference;
reading a first detection signal outputted by the detection module, so as to determine whether the crowbar circuit is thrown into the wind turbine;
inputting a second control signal to the crowbar circuit, so as to turn off the crowbar circuit; and
reading again the second detection signal outputted by the detection module, to determine whether the crowbar circuit is normally cut out from the wind turbine.
1 Assignment
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Accused Products
Abstract
A device and a method for detecting a crowbar circuit in a wind turbine are provided, wherein the wind turbine comprises a converter electrically connected to the crowbar circuit, and the method comprises: electrically coupling a detection module to the crowbar circuit; inputting a first control signal into the crowbar circuit, to turn on the crowbar circuit; providing a three-phase voltage signal to the crowbar circuit via the converter, wherein voltage signals in any two adjacent phases has a predetermined phase angle difference; reading the first detection signal outputted by the detection module, to determine whether the crowbar circuit is normally thrown into the wind turbine; inputting a second control signal to the crowbar circuit, to turn off the crowbar circuit; and reading again the second detection signal outputted by the detection module, to determine whether the crowbar circuit is normally cut out from the wind turbine.
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Citations
13 Claims
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1. A method for detecting a crowbar circuit in a wind turbine, wherein the wind turbine comprises a converter electrically connected to the crowbar circuit, wherein the method comprises:
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electrically coupling a detection module to the crowbar circuit; inputting a first control signal into the crowbar circuit, so as to turn on the crowbar circuit; providing a three-phase voltage signal to the crowbar circuit via the converter, wherein voltage signals in two adjacent phases has a predetermined phase angle difference; reading a first detection signal outputted by the detection module, so as to determine whether the crowbar circuit is thrown into the wind turbine; inputting a second control signal to the crowbar circuit, so as to turn off the crowbar circuit; and reading again the second detection signal outputted by the detection module, to determine whether the crowbar circuit is normally cut out from the wind turbine. - View Dependent Claims (2, 3, 4, 5)
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6. A device for detecting a crowbar circuit in a wind turbine, wherein the wind turbine comprises a converter electrically connected to the crowbar circuit, and the device comprises:
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a detection module electrically connected to the crowbar circuit for outputting a detection signal; a control module electrically connected to the crowbar circuit for outputting a first control signal and a second control signal, wherein the first control signal is used for turning on the crowbar circuit, and the second control signal is used for turning off the crowbar circuit; and an alarm module electrically connected to the detection module for receiving the detection signal and determining whether the crowbar circuit operates normally according to the detection signal; wherein, the detection signal comprises a first detection signal and a second detection signal, wherein when the control module outputs the first control signal, the first detection signal is used for detecting whether the crowbar circuit is normally thrown into the wind turbine, and when the control module outputs the second control signal, the second detection signal is used for detecting whether the crowbar circuit is normally cut out from the wind turbine. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13)
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Specification