Relay protection and failure location system for power distribution network
Title：
Relay protection and failure location system for power distribution network
Application Number：
 01130657
Application Date：
 2001/08/17
Announcement Date：
 2002/02/06
Pub. Date：
Publication Number：
 1334627
Announcement Number：
 1167176
Grant Date：
 2004-9-15
Granted Pub. Date：
 2004-9-15
ApplicationType：
 Invention
State/Country：
 11[China|beijing]
IPC：
 G01R 31/08, H02H 7/26, H02H 7/28
Applicant(s)：
 Qinghua Univ
Inventor(s)：
 Dong Xinzhou, Bo Zhiqian
Key Words：
 Relay protection, failure location system, power distribution network
Abstract：
 The invention relates to a system used in the area of electrical power to locate fault rapidly. The system is composed of two parts i.e. multi measuring and executing units as well as communication channels to connect the said units. The measuring and executing units consist of current transformer, polarity detecting and comparing relay, first communication interface unit, second communication interface unit and circuit breaker. The communication channels consists of protecting channel and the channel utilized to locate fault on whole network. Whether the fault of equipment happens or not is judged by detecting and comparing the similarities and differences of polarity of electrical current fault component which has passed through the protected switch gear. The communicating means is used to connect all relays that protect the same equipment, it realizes relay protection for all distributing line, distributing bus line and distribution transformer. Personal staffs are able to find out and locate the fault location since this information of current polarity has been passed to dispatching center by communication means. The system is independent of particular configuration of distribution network and does not utilize information of voltage fault. The configuration of the system is simple and easy to realize.
Claim：
Priority：
PCT：
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