Patent ID: 11955792
Assignee: FRAUNHOFER GESELLSCHAFT ZUR FÖRDERUNG DER ANGEWANDTEN FORSCHUNG E.V.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  G  Y | IPC H

Claim 8:
9. A network segment of an electrical power distribution network which comprises one or more line arrangements which are each connected to a supply device for supplying electrical energy to the respective line arrangement at one or more supply regions via a line protection device for protecting the respective line arrangement;
wherein each line protection device comprises a receiving device, a triggering device and a disconnecting device;
wherein one or more intermediate feeding devices for feeding intermediately fed electrical energy into the respective line arrangement and/or one or more electrical loads are connected to at least one of the line arrangements;
wherein at least one of the intermediate feeding devices and/or at least one of the electrical loads comprise a voltage dip detection device and a signal generation device;
wherein the voltage dip detection devices are configured to detect voltage dips at the respective intermediate feeding device or at the respective electrical load of the line arrangements;
wherein the signal generating devices are configured for generating and feeding an electrical signal into the respective line arrangement if one of the voltage dips is detected at the intermediate feeding device or the electrical load of the respective signal generating device;
wherein the electrical signal or the electrical signals comprise one or more frequencies different from a network frequency of the network segment;
wherein the receiving devices of the line protection devices are configured to receive the electrical signal or the electrical signals via the line arrangements;
wherein the triggering devices are configured to detect electrical faults on the respective line arrangement of the respective line protection device using the electrical signal received by the receiving device of the respective line protection device or the electrical signals received by the receiving device of the respective line protection device; and
wherein the triggering devices are configured to trigger the disconnecting device assigned thereto if one of the electrical faults is detected on the respective line arrangement of the respective line protection device so that the respective line arrangement is electrically disconnected from the respective supply device.