Title:
METHOD AND CONTROL SYSTEM FOR FAULT DIRECTION DETECTION
Document Type and Number:
WIPO Patent Application WO/2018/227467
Kind Code:
A1
Abstract:
It provides a method for detecting fault direction of transmission line (10) of an AC power system and control system using the same. The method includes: sampling current values and voltage values of three phases at one end of the transmission line (10) for a series of time points; for each of the series of time points, computing instantaneous symmetrical voltage components of the three phases based on the voltage value samples for the respective one of the series of time points; for each of the series of time points, computing instantaneous symmetrical current components of the three phases based on the current value samples for the respective one of the series of time points; for at least two of the series of time points, calculating energy directional elements each based on the respective ones of the computed instantaneous symmetrical voltage components and the respective ones of the computed instantaneous symmetrical current components; identifying the fault direction in consideration of the calculated energy directional elements; and generating a fault direction signal indicating the identified fault direction. Simulation results show the graph of the energy directional element calculated based on instantaneous symmetrical voltage components and instantaneous symmetrical current components exhibits distinctive characteristics either for forward or reverse fault. In consideration of such difference, by calculating the energy directional element at each sampling time point, the fault direction information may be identified accurately.
Inventors:
LIU KAI (CN)
Application Number:
PCT/CN2017/088417
Publication Date:
December 20, 2018
Filing Date:
June 15, 2017
Export Citation:
Assignee:
ABB SCHWEIZ AG (CH)
LIU KAI (CN)
LIU KAI (CN)
International Classes:
H02H7/26
Domestic Patent References:
| WO2010115474A1 | 2010-10-14 |
Foreign References:
| CN103762564A | 2014-04-30 | |||
| CN101701999A | 2010-05-05 | |||
| US6584417B1 | 2003-06-24 | |||
| US6914408B2 | 2005-07-05 | |||
| EP3046197A1 | 2016-07-20 |
Other References:
HE BENTENGJIN HUAFENGLI JU: "Principle and Property Research of the Energy Directional Protection", PROCEEDINGS OF THE CSEE, vol. 17, no. 3, May 1997 (1997-05-01)
See also references of EP 3639337A4
See also references of EP 3639337A4
Attorney, Agent or Firm:
BOSS & YOUNG PATENT AND TRADEMARK LAW OFFICE (CN)
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