Locating a ground fault in a DC network

US11754613B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Hubert Schierling · Erlangen, DE
• Benno Weis · Hemhofen, DE

Key dates

• Filing date: Mar 18, 2020
• Grant date: Sep 12, 2023
• Expiry date: Jun 30, 2040

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y04S10/52
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

A method is disclosed for locating an earth fault in a DC network, to which multiple load zones are connectable. Each load zone has two symmetrically earthed load zone lines. In an embodiment of the method, for each load zone line, a line voltage is continuously measured between a line potential, at which the load zone line lies, and an earth potential. In the event that an earth fault is detected at a main line of the DC network, the main lines are separated from both load zone lines of a load zone and the earth fault is assigned to this load zone, if a magnitude difference between the magnitudes of the line voltages of the two load zone lines of this load zone are not significantly reduced after separating the main lines from the load zone lines.