Title:
METHOD FOR DETERMINING FAULT TYPE OF HIGH VOLTAGE DIRECT CURRENT TRANSMISSION LINE
Document Type and Number:
WIPO Patent Application WO/2018/233294
Kind Code:
A1
Abstract:
A method for determining the fault type of a high voltage direct current transmission line, comprising: acquiring the positive and negative voltages and currents of a j end and a k end of a direct current line and converting same into the voltage and current values in mode form; calculating the traveling wave differential currents of the 0-mode and the 1-mode components of the j end and the k end of the line respectively; comparing the calculated value of the traveling wave differential current of the 1-mode component at the current time t with the calculated value at the time t-t0 so as to determine whether a fault occurs on the direct current line; converting the traveling wave differential currents of modes of the j end and the k end into traveling wave differential currents in polar form; calculating fault type coefficients of the two ends of the transmission line; and performing fault determination according to characteristics of the fault type coefficients.
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Inventors:
LI BIN (CN)
QIU HONG (CN)
QIU HONG (CN)
Application Number:
PCT/CN2018/074454
Publication Date:
December 27, 2018
Filing Date:
January 29, 2018
Export Citation:
Assignee:
UNIV TIANJIN (CN)
International Classes:
G01R31/08; H02H7/26
Domestic Patent References:
| WO2014121438A1 | 2014-08-14 |
Foreign References:
| CN106849029A | 2017-06-13 | |||
| CN105071355A | 2015-11-18 | |||
| CN105403779A | 2016-03-16 | |||
| CN1870378A | 2006-11-29 | |||
| CN102255293A | 2011-11-23 | |||
| CN105518958A | 2016-04-20 | |||
| JPH06296321A | 1994-10-21 |
Other References:
YU, YANG ET AL.: "Traveling wave theory and differential protection scheme for bipolar-operating HVDC transmission lines", SOUTHERN POWER SYSTEM TECHNOLOGY, vol. 5, no. 2, 20 April 2011 (2011-04-20), pages 40 - 44, XP055650398, ISSN: 1674-0629, DOI: 10.13648/j.cnki.issn1674-0629
Attorney, Agent or Firm:
BEI & OCEAN (CN)
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