US 2026/0149266 A1 · METHOD AND APPARATUS FOR CONTROLLING ARC SUPPRESSION DEVICE

Abstract

A method and apparatus for controlling an arc suppression device of a three-phase electric network, the arc suppression device having an adjustable admittance connected between a neutral point of the three-phase electric network and earth, the apparatus being configured to determine a resonant frequency of a zero-sequence system of the three-phase electric network, determine at least two frequencies for a current injection on the basis of the determined resonant frequency, perform a current injection into the neutral point of the three-phase electric network by using the determined at least two frequencies, determine a value of at least one parameter related to the three-phase electric network on the basis of the current injection, and use the determined value of the at least one parameter for adjusting the admittance of the arc suppression device.

Claims20

Dependent claims

A method for controlling an arc suppression device of a three-phase electric network, the arc suppression device having an adjustable admittance connected between a neutral point of the three-phase electric network and earth, the method comprising:

a) determining a resonant frequency of a zero-sequence system of the three-phase electric network;
b) determining at least two frequencies for a current injection based on the determined resonant frequency;
c) performing a current injection into the neutral point of the three-phase electric network by using the determined at least two frequencies;
d) determining a value of at least one parameter related to the three-phase electric network based on the current injection;
and
e) using the determined value of the at least one parameter for adjusting the admittance of the arc suppression device.

3 more elements

An apparatus for controlling an arc suppression device of a three-phase electric network, the arc suppression device having an adjustable admittance connected between a neutral point of the three-phase electric network and earth, the apparatus configured to:

determine a resonant frequency of a zero-sequence system of the three-phase electric network;
determine at least two frequencies for a current injection based on the determined resonant frequency;
perform a current injection into the neutral point of the three-phase electric network using the determined at least two frequencies;
determine a value of at least one parameter related to the three-phase electric network based on the current injection;
and
use the determined value of the at least one parameter for adjusting the admittance of the arc suppression device.

3 more elements

A controller for an arc suppression device for a three-phase electric network, the arc suppression device having an adjustable admittance configured to be connected between a neutral point of the three-phase electric network and earth, the controller comprising a processor and a memory storing instructions that, when executed by the processor, cause the controller to:

determine a resonant frequency of a zero-sequence system of the three-phase electric network;
determine at least two frequencies for a current injection based on the determined resonant frequency;
perform a current injection into the neutral point of the three-phase electric network using the determined at least two frequencies;
determine a value of at least one parameter related to the three-phase electric network based on the current injection;
and
adjust the admittance of the arc suppression device using the determined value of the at least one parameter.

3 more elements

Dependencies are inferred from the claim text.

Method and apparatus for controlling arc suppression device

Life of this patent

Method and apparatus for controlling arc suppression device

Life of this patent

Abstract

Claims20