Device and method for degassing on-load tap-changer of transformer for convenient on-site operation

US11759729B2 · kind B2 · utility

Assignee

• State Grid Liaoning Electric Power Research Institute · CN

Inventors

• Yuxiao Zhou · Shanghai, CN
• Lu Liu · Princeton, US
• Honggang Han · 东风镇, CN
• Xuchen Lu · 东风镇, CN
• Jianhong Kong · 东风镇, CN
• Defu Wei · 东风镇, CN
• Tie Guo · 东风镇, CN
• Hao A. Chen · Shanghai, CN
• Yang Liu · Nanhu, CN
• Nan Wang · Shanghai, CN
• Zijian Zhao · Beijing, CN
• Shiqing Wang · Beijing, CN
• Chang Liu · Hohhot, CN
• Dawei Jiang · 东风镇, CN
• Yue Gao · 红钢城街道, CN

Key dates

• Filing date: Dec 30, 2020
• Grant date: Sep 19, 2023
• Expiry date: Oct 22, 2041

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B01D2253/106
• WIPO field: Chemical engineering
• WIPO sector: Chemistry

Abstract

A device and method for degassing an on-load tap-changer (OLTC) of a transformer for convenient on-site operation. The degassing device includes an OLTC. The OLTC is respectively connected with an oil suction pipe and an oil injection pipe. One end of the oil suction pipe extends to the inside bottom of the OLTC, and the other end of the oil suction pipe extends to the outside of the OLTC to connect with an oil suction and degassing device. One end of the oil injection pipe extends to an upper part inside the OLTC, and the other end of the oil injection pipe extends to the outside of the OLTC to connect with a vacuum oil injection device. The present disclosure has the advantages of convenient on-site operation, excellent degassing effect, simple structure and convenient installation, reduces degassing time and manpower and investment in maintenance, and improves degassing quality.