Short circuit fault current limiter

US10756537B2 · kind B2 · utility

Assignees

• Huazhong University of Science and Technology · CN
• GUANGZHOU POWER SUPPLY CO., LTD. · CN

Inventors

• Zhao Yuan · Tallahassee, US
• Junxiang Liu · Shanghai, CN
• Fating Yuan · 红钢城街道, CN
• Lixue Chen · 红钢城街道, CN
• Junjia He · 红钢城街道, CN
• Yuan Pan · 红钢城街道, CN
• Kaijian Wu · 红钢城街道, CN
• Yong Wang · Lo Wu, CN
• Wenxiong Mo · 流花街道, CN
• Haibo Su · Huizhou, CN

Key dates

• Filing date: Nov 28, 2016
• Grant date: Aug 25, 2020
• Expiry date: Jan 15, 2038

Classification

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

Abstract

A short circuit fault current limiter includes a circuit breaker, a transfer current limiting unit and a current detection unit. The current detection unit is connected to the circuit breaker in series, and the circuit breaker and the transfer current limiting unit are connected in parallel into the power system line. An output terminal of the current detection unit is connected to a control terminal of the transfer current limiting unit. The current detection unit is configured to detect a fault current flowing through a branch of the circuit breaker under a short circuit fault operating condition and trigger the corresponding trigger switch of the transfer current limiting unit to be switched on, so that the circuit breaker is disconnected and the secondary side winding of the coupling reactor is connected to the system line in series, which is capable of rapidly limiting the amplitude of the fault current and reducing impact of the fault current on the system.