Title:
METHOD, SYSTEM AND APPARATUS FOR FAULT DETECTION IN LINE PROTECTION FOR POWER TRANSMISSION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2017/177424
Kind Code:
A1
Abstract:
A method, system and apparatus of fault detection in line protection for a power transmission system. A voltage (u) at a measurement point on an electrical line is obtained. The measurement point is a point at which a protection device for the line protection is installed. A current (i) at the measurement point is further obtained and a differential value of the current is determined. Then, a voltage (u q) at a setting point on the electrical line is determined from the voltage (u) at the measurement point, the current (i) at the measurement point and the differential value of the current (i) according to a time domain lumped parameter model for the electrical line. The voltage change between the determined voltage at the setting point during the fault period and a voltage at the setting point determined during a pre-fault period can be further determined. The fault detection can be performed based on the determined voltage change and a fault threshold. It can ensure voltage determination accuracy and detection reliability with a low sampling rate. Moreover, the solution can work right after the fault inception, almost no waiting time is required, and thus it may achieve a super-fast line protection.
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Inventors:
LIU KAI (CN)
LI YOUYI (SE)
WANG JIANPING (SE)
LI YOUYI (SE)
WANG JIANPING (SE)
Application Number:
PCT/CN2016/079323
Publication Date:
October 19, 2017
Filing Date:
April 14, 2016
Export Citation:
Assignee:
ABB SCHWEIZ AG (CH)
LIU KAI (CN)
LI YOUYI (SE)
WANG JIANPING (SE)
LIU KAI (CN)
LI YOUYI (SE)
WANG JIANPING (SE)
International Classes:
G01R31/08; G01R31/58
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| CN101242094A | 2008-08-13 | |||
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| US20120086459A1 | 2012-04-12 | |||
| US20130304406A1 | 2013-11-14 | |||
| CN101242094A | 2008-08-13 | |||
| CN101232177A | 2008-07-30 | |||
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| CN102288874A | 2011-12-21 | |||
| US4183072A | 1980-01-08 | |||
| US20150081235A1 | 2015-03-19 |
Other References:
"A new approach to high speed relaying based on transient phenomena", FOURTH INTERNATIONAL CONFERENCE ON DEVELOPMENTS IN POWER PROTECTION, 11 April 1989 (1989-04-11), pages 140 - 145
COSTA EDUARDO COELHO M ET AL., ESTIMATION OF TRANSMISSION LINE PARAMETERS USING MULTIPLE METHODS
VYAS BHARGAV ET AL., PROTECTION OF SERIES COMPENSATED TRANSMISSION LINE: ISSUES AND STATE OF ART
ROBERTO SCHULZE ET AL., PARAMETER IDENTIFICATION OF UNSYMMETRICAL TRANSMISSION LINES USING FAULT RECORDS OBTAINED FROM PROTECTIVE RELAYS
See also references of EP 3443368A4
COSTA EDUARDO COELHO M ET AL., ESTIMATION OF TRANSMISSION LINE PARAMETERS USING MULTIPLE METHODS
VYAS BHARGAV ET AL., PROTECTION OF SERIES COMPENSATED TRANSMISSION LINE: ISSUES AND STATE OF ART
ROBERTO SCHULZE ET AL., PARAMETER IDENTIFICATION OF UNSYMMETRICAL TRANSMISSION LINES USING FAULT RECORDS OBTAINED FROM PROTECTIVE RELAYS
See also references of EP 3443368A4
Attorney, Agent or Firm:
KING & WOOD MALLESONS (CN)
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