Method for calibrating a current transducer of the rogowski type
View Patent ↗An exemplary method for calibrating a current transducer of the Rogowski type including a Rogowski coil sensor and an electronic device is performed by determining and correcting the sensitivity of the current transducer of the Rogowski type through the measurement of the self-inductance L RCCT of the coil using the electronic device.
1. A method for calibrating a current transducer of a Rogowski type using an arrangement including a Rogowski coil sensor and an electronic device, the method comprising:
determining and correcting a sensitivity of the current transducer of the Rogowski type by measuring a self-inductance L RCCT of a coil using the electronic device.
2. The method according to claim 1 , wherein the self-inductance is measured with a test current or a test voltage superimposed to a coil winding.
3. The method according to claim 2 , wherein an output voltage generated by a primary current to be measured with the coil sensor is measured simultaneously with the self- inductance of the coil of the current transducer of the Rogowski type.
4. The method according to claim 3 , wherein the self-inductance measurement is used to diagnose and calibrate the current transducer of the Rogowski type.
5. The method according to claim 4 , wherein coil design parameters of the coil of the current transducer of the Rogowski type are automatically detected by the electronic device.
6. The method according to claim 3 , wherein the self-inductance is measured through a response of the coil of the current transducer of the Rogowski type to a step voltage source which is connected in series with a resistor.
7. The method according to claim 6 , wherein coil design parameters of the coil of the current transducer of the Rogowski type are automatically detected by the electronic device.
8. The method according to claim 3 , wherein the self-inductance is measured by measuring a frequency response of a serial circuit of the coil of the current transducer of the Rogowski type and a resistor by exciting the current transducer with AC signals of varying frequency.
9. The method according to claim 8 , wherein coil design parameters of the coil of the current transducer of the Rogowski type are automatically detected by the electronic device.
10. The method according to claim 3 , wherein coil design parameters of the coil of the current transducer of the Rogowski type are automatically detected by the electronic device.
11. The method according to claim 2 , wherein coil design parameters of the coil of the current transducer of the Rogowski type are automatically detected by the electronic device.
12. The method according to claim 1 , wherein coil design parameters of the coil of the current transducer of the Rogowski type are automatically detected by the electronic device.
13. A method for performing diagnostics on a current transducer of a Rogowski type, the current transducer having a Rogowski coil sensor and a electronic device, the method comprising:
calibrating the current transducer according to claim 1 .
14. A current transducer of a Rogowski type, comprising:
a Rogowski coil sensor; and
an electronic device,
wherein the electronic device is configured to perform a method for calibrating the current transducer according to claim 1 .
15. A current transducer of a Rogowski type, comprising:
a Rogowski coil sensor; and
an electronic device,
wherein the electronic device is configured to perform a method for performing diagnostics on a current transducer according to claim 13 .