Method and device for capturing a fault in an electrical supply grid

An apparatus for detection of a fault in an electrical power supply system, the apparatus comprising a computer with a non-transient computer readable medium having stored thereon a set of computer readable instructions causing the computer to perform the following steps when the set of computer readable instructions is executed on the computer:

• obtaining a virtual component formed by connecting a component of the electrical supply system to at least one supply line and combining the component of the electrical supply system with some input lines and output lines of the supply line to the component of the electrical supply system;
• associating a fault indicator with each supply line connected to a component within a virtual component;
• determining a direction of a possible fault;
• assigning a correlation coefficient to each fault indicator as a function of the direction of the fault;
• combining at least two fault indicators of a virtual component to form an index;
• and
• comparing at least two indices of virtual components with one another.

A non-transient computer readable medium having stored thereon a set of computer readable instructions causing a computer to perform the following steps when the set of computer readable instructions is executed on the computer:

• obtaining a virtual component formed by connecting a component of an electrical power supply system to at least one supply line and combining the component of the electrical supply system with some input lines and output lines of the supply line to the component of the electrical supply system;
• associating a fault indicator with each supply line connected to a component within a virtual component;
• determining a direction of a possible fault;
• assigning a correlation coefficient to each fault indicator as a function of the direction of the fault;
• combining at least two fault indicators of a virtual component to form an index;
• and
• comparing at least two indices of virtual components with one another.