Apparatus and method for diagnosing failure of electromagnetic-inductive power supply apparatus
Disclosed are an apparatus and a method for diagnosing a failure of an electromagnetic-inductive power supply apparatus, which diagnoses whether a power-generation CT has failed by comparing the values detected in a sensor CT and the power-generation CT, thereby preventing the generating efficiency from being reduced. The disclosed apparatus for diagnosing the failure of the electromagnetic-inductive power supply apparatus detects detection values of a power-generation CT and a sensor CT, converts detection values into converted value by scaling detection values, and diagnoses whether the current transformer has failed and whether the power-outage has occurred based on converted values.
1. An apparatus for diagnosing a failure of an electromagnetic-inductive power supply apparatus including a sensor current transformer and a power-generation current transformer, comprising:
a power-generation CT detection unit for detecting an electrical property of the power-generation current transformer with a power-generation CT detection value;
a sensor CT detection unit for detecting an electrical property of the sensor current transformer with a sensor CT detection value;
a converting unit for converting the power-generation CT detection value and the sensor CT detection value into a power-generation CT converted value and a sensor CT converted value by scaling at least one of the power-generation CT detection value and the sensor CT detection value; and
a failure determining unit for diagnosing whether to fail based on the power-generation CT converted value and the sensor CT converted value.
2. The apparatus for diagnosing the failure of the electromagnetic-inductive power supply apparatus of claim 1 ,
wherein the electrical property is at least one of current, voltage, and power.
3. The apparatus for diagnosing the failure of the electromagnetic-inductive power supply apparatus of claim 1 ,
wherein the converting unit sets the power-generation CT detection value as the power-generation CT converted value by scaling the power-generation CT detection value based on a winding ratio of the sensor current transformer and the power-generation current transformer, and sets the sensor CT detection value as the sensor CT converted value.
4. The apparatus for diagnosing the failure of the electromagnetic-inductive power supply apparatus of claim 1 ,
wherein the converting unit sets the sensor CT detection value as the sensor CT converted value by scaling the sensor CT detection value based on a winding ratio of the sensor current transformer and the power-generation current transformer, and sets the power-generation CT detection value as the power-generation CT converted value.
5. The apparatus for diagnosing the failure of the electromagnetic-inductive power supply apparatus of claim 1 ,
wherein the converting unit sets the power-generation CT detection value and the sensor CT detection value as the power-generation CT converted value and the sensor CT converted value by scaling the power-generation CT detection value and the sensor CT detection value based on a winding ratio of the sensor current transformer and the power-generation current transformer.
6. The apparatus for diagnosing the failure of the electromagnetic-inductive power supply apparatus of claim 1 ,
wherein the failure determining unit determines that the power-generation current transformer has failed when a difference between the sensor CT converted value and the power-generation CT converted value exceeds the error range.
7. The apparatus for diagnosing the failure of the electromagnetic-inductive power supply apparatus of claim 1 ,
wherein the failure determining unit determines that the sensor current transformer has failed when the detection value of the sensor CT detection unit exceeds an error range of a reference value.
8. The apparatus for diagnosing the failure of the electromagnetic-inductive power supply apparatus of claim 1 ,
wherein the failure determining unit determines that a power-outage has occurred when the power-generation CT converted value has kept a power-outage reference value or less during a set time, and the sensor CT converted value is equal to or smaller than the power-outage reference value.
9. The apparatus for diagnosing the failure of the electromagnetic-inductive power supply apparatus of claim 1 ,
wherein the failure determining unit determines that the power-generation current transformer has failed when the power-generation CT converted value has kept a power-outage reference value or less during a set time, and the sensor CT converted value is equal to or greater than the power-outage reference value.
10. A method for diagnosing a failure of an electromagnetic-inductive power supply apparatus including a sensor current transformer and a power-generation current transformer, comprising:
detecting an electrical property of the power-generation current transformer with a power-generation CT detection value;
detecting an electrical property of the sensor current transformer with a sensor CT detection value;
converting the power-generation CT detection value and the sensor CT detection value into a power-generation CT converted value and a sensor CT converted value by scaling at least one of the power-generation CT detection value and the sensor CT detection value; and
diagnosing whether to fail based on the power-generation CT converted value and the sensor CT converted value.
11. The method for diagnosing the failure of the electromagnetic-inductive power supply apparatus of claim 10 ,
wherein the electrical property is at least one of current, voltage, and power.
12. The method for diagnosing the failure of the electromagnetic-inductive power supply apparatus of claim 10 ,
wherein the converting comprises
setting the power-generation CT detection value as the power-generation CT converted value by scaling the power-generation CT detection value based on a winding ratio of the sensor current transformer and the power-generation current transformer; and
setting the sensor CT detection value as the sensor CT converted value.
13. The method for diagnosing the failure of the electromagnetic-inductive power supply apparatus of claim 10 ,
wherein the converting comprises
setting the sensor CT detection value as the sensor CT converted value by scaling the sensor CT detection value based on a winding ratio of the sensor current transformer and the power-generation current transformer; and
setting the power-generation CT detection value as the power-generation CT converted value.
14. The method for diagnosing the failure of the electromagnetic-inductive power supply apparatus of claim 10 ,
wherein the converting comprises
setting the power-generation CT detection value as the power-generation CT converted value by scaling the power-generation CT detection value based on a winding ratio of the sensor current transformer and the power-generation current transformer; and
setting the sensor CT detection value as the sensor CT converted value by scaling the sensor CT detection value based on the winding ratio of the sensor current transformer and the power-generation current transformer.
15. The method for diagnosing the failure of the electromagnetic-inductive power supply apparatus of claim 10 ,
wherein the diagnosing whether to fail comprises determining that the power-generation current transformer has failed when a difference between the sensor CT converted value and the power-generation CT converted value exceeds an error range.
16. The method for diagnosing the failure of the electromagnetic-inductive power supply apparatus of claim 10 ,
wherein the diagnosing whether to fail comprises determining that the sensor current transformer has failed when the sensor CT detection value exceeds an error range of a reference value.
17. The method for diagnosing the failure of the electromagnetic-inductive power supply apparatus of claim 10 ,
wherein the diagnosing whether to fail comprises determining that the power-outage has occurred when the power-generation CT converted value has kept a power-outage reference value or less during a set time, and the sensor CT converted value is equal to or smaller than the power-outage reference value.
18. The method for diagnosing the failure of the electromagnetic-inductive power supply apparatus of claim 10 ,
wherein the diagnosing whether to fail comprises determining that the power-generation current transformer has failed when the power-generation CT converted value has kept a power-outage reference value or less during a set time, and the sensor CT converted value is equal to or greater than the power-outage reference value.