Electric power system wave-recoding file based fault detection method and system

A technology for recording wave files and power systems, applied in directions such as fault locations, and can solve problems such as being unable to feed back power grid status in real time.
CN103439635AInactive Publication Date: 2013-12-11NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
Publication Date
2013-12-11
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention discloses an electric power system wave-recoding file based fault detection method and system and relates to an electric power system fault detection technology. By using the method and system, the problem of non-real time feedback of electrical network states of a conventional dispatcher electrical network fault auxiliary system can be solved. The fault detection method comprises a wave-recoding file reading step, a fault type determining step and a fault situation analyzing step. The fault type determining step comprises: determining a fault according to the three-phase current information in a wave-recoding file and determining whether the fault is a grounding fault, if so, determining whether the grounding fault is a single-phase grounding fault or a two-phase grounding fault, otherwise, determining whether the grounding fault is a three-phase short circuit fault, and if the grounding fault is not the three-phase short circuit fault, determining which two phases are in a two-phase short circuit fault. The fault situation analyzing step involves determining fault situations according to fault states before and after a current abrupt change point and current change states. The method and system provided by the invention can be applied to the modernization operation management of a conventional electrical network.
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Description

technical field

[0001] The application relates to the fault detection technology of electric power system, and belongs to the technical field of fault detection in electric power system. Background technique

[0002] Heilongjiang Power Grid is an important power source base of the Northeast Power Grid. In recent years, with the continuous expansion of power supply scale, the stability of power transmission is very serious. After the Yimu DC Project was put into operation, Heilongjiang Power Grid became a mixed AC and DC power grid. The security and stability control of the power grid is more complicated, and a large number of security and stability control devices are used to ensure the safe operation of the power grid. At present, the safety control device of Heilongjiang power grid has not realized the network connection with the operation information of the provincial power dispatching center. The operation report and abnormal operation information of the device still rel...

Claims

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