Method for improving power distribution protection

US9362736B2 · kind B2 · utility

Assignee

• Hamilton Sundstrand Corporation (HSC) · US

Inventors

• Michael Krenz · Roscoe, US
• Carl A. Wagner · Beloit, US
• Jeffrey T. Wavering · Rockford, US
• Norbert J. Simper · Bissingen, DE
• Josef Maier · Eichstätt, DE
• Rainer Seidel · Berlin, DE
• Michael William Foster · Rockford, US

Key dates

• Filing date: Apr 26, 2012
• Grant date: Jun 7, 2016
• Expiry date: Apr 9, 2035

Classification

• Technology area (CPC H): Electricity
• CPC primary: H02H7/30
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

A solid state switch module is provided for use in a power distribution network including an input differential protection connection for receiving a measured current value from an upstream module. The solid state switch module also includes an output differential protection connection for sending a measured current value. The solid state switch module includes a trip outlet for sending a trip signal to an upstream solid state switch, and a trip inlet for receiving a trip signal from a downstream solid state switch. The trip inlet is operably coupled to the switch. A current sensor measures the current value of a connected power transmission line across the solid state switch module. A summer adds a current input from a parallel module with the current measures by the current sensor. A comparator determines whether an amount of current lost between the solid state switch module and an upstream module is acceptable.