Direct current circuit breaker

US10796866B2 · kind B2 · utility

Assignee

• Huazhong University of Science and Technology · CN

Inventors

• Zhao Yuan · Tallahassee, US
• Junjia He · 红钢城街道, CN
• Yuan Pan · 红钢城街道, CN
• Hui Xu · Lo Wu, CN
• Wenting Zhao · 红钢城街道, CN
• Xiaogen YIN · 红钢城街道, CN

Key dates

• Filing date: Sep 13, 2017
• Grant date: Oct 6, 2020
• Expiry date: Feb 25, 2039

Classification

• Technology area (CPC H): Electricity
• CPC primary: H02H3/021
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

A direct current circuit breaker, including: n in number circuit breaker modules connected in series, one energy-absorbing and voltage-limiting module connected in parallel to the n in number circuit breaker modules, and a trigger module. The n in number circuit breaker modules each includes a mechanical switch and a commutation branch circuit which are connected in parallel; each commutation branch circuit includes a charging commutation module and a commutation capacitor which are connected in series; the charging commutation module is configured to charge up the commutation capacitor and produce reverse current to cut off the mechanical switch; the one energy-absorbing and voltage-limiting module is configured to absorb energy stored in inductive elements of power systems after a fault current is cut off, so as to limit voltage and protect the mechanical switch, and n is a positive integer greater than or equal to 1.