Title:
ELECTRICAL LINE PROTECTION METHOD
Document Type and Number:
WIPO Patent Application WO/2015/081826
Kind Code:
A1
Abstract:
An electrical line protection method comprises: collecting a traveling wave electrical quantity and a power frequency electrical quantity at one end of a protected line in real time; determining whether disturbance occurs on the protected line based the traveling wave electrical quantity; if disturbance occurs on the protected line, determining whether the protected line has a fault based on the power frequency electrical quantity; if the protected line has a fault, outputting a trip signal; if the protected line does not have a fault, determining whether the criteria for continuous traveling wave disturbance is satisfied; and if the criteria for continuous traveling wave disturbance is satisfied, outputting a fault warning signal. The method can provide fault information about the protected line in time, especially can provide fault warning information about the protected line in time, and can accurately and rapidly detect an earth fault, reduce and prevent fault, improve power supply reliability of an electrical system, and ensure secure operation of the electrical line.
Inventors:
SHI SHENXING (CN)
DONG XINZHOU (CN)
DONG XINZHOU (CN)
Application Number:
PCT/CN2014/092679
Publication Date:
June 11, 2015
Filing Date:
December 01, 2014
Export Citation:
Assignee:
UNIV TSINGHUA (CN)
International Classes:
H02H7/26; G01R31/08
Foreign References:
| CN102420420A | 2012-04-18 | |||
| CN101533060A | 2009-09-16 | |||
| CN101533062A | 2009-09-16 | |||
| JP2010074866A | 2010-04-02 |
Other References:
JIANG, CHUNLING ET AL.: "Research on the On-line Monitoring Technology for Cables Based on Travelling Wave", ELECTRONIC TECHNOLOGY, 25 October 2011 (2011-10-25), pages 23 - 25
Attorney, Agent or Firm:
BEIJING EAST IP LTD. (CN)
北京东方亿思知识产权代理有限责任公司 (CN)
北京东方亿思知识产权代理有限责任公司 (CN)
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