A method and device for identifying abnormal events in a power system
An abnormal event and power system technology, which is applied in the direction of fault location and fault detection according to conductor type, can solve the problem of not being able to accurately identify the type of abnormal event in the power system
Active Publication Date: 2021-08-17
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID NINGXIA ELECTRIC POWER COMPANY +2
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[0004] Embodiments of the present invention provide a method and device for identifying abnormal events in a power system to solve the problem in the prior art that the types of abnormal events in a power system cannot be accurately identified
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[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0027] The embodiment of the invention discloses a method for identifying abnormal events of a power system. Such as figure 1 As shown, the method of the embodiment of the present invention includes the following steps:
[0028] Step S101: Simulate the known abnormal events occurring on the lines of the power system to obtain data of the known abnormal events.
[0029] The simulation is based on a hardware-in-the-loop cyber-physical simulation platfo...
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The invention discloses a method and a device for identifying abnormal events in a power system. The method includes: simulating the known abnormal events occurring on the lines of the power system to obtain the data of the known abnormal events; sorting the data of the known abnormal events according to time to obtain the state transition time series of the known abnormal events; extracting The longest subsequence of the state transition time series of known abnormal events of the same kind is used as the characteristic sequence of known abnormal events of the same kind under a certain support degree to obtain a characteristic sequence list; under a certain support degree, traverse the characteristic sequence list to obtain power The containment relationship between the state transition time series and the characteristic sequence of the unknown abnormal event occurring on the line of the system; if the state transition time series of the unknown abnormal event contains a characteristic sequence of the known abnormal event of the same type, then determine the type of the unknown abnormal event Same category as known anomalous events of this type. The invention can identify abnormal events with high accuracy and reliability.
Description
technical field [0001] The invention relates to the technical field of power system network security, in particular to a method and device for identifying abnormal events in a power system. Background technique [0002] As one of the most important infrastructures in modern society, the power system has been deeply integrated with the communication system and has become a typical cyber physical system (Cyber Physical System, CPS). On the one hand, the power grid has become more intelligent; on the other hand, it also brings potential risks of cyber attacks. Cyber-attacks against power systems can exploit vulnerabilities in control equipment and communication links to corrupt control and measurement signals and mislead monitoring algorithms. Power system failures, such as broken transmission lines, can lead to cascading power system outages if operators do not take appropriate action. [0003] Natural factors and network attacks are two factors that lead to power system a...
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IPC IPC(8): G01R31/08
CPCG01R31/085
Inventor 任勇张爽刘科研罗海荣李峰王琦叶学顺田蓓杨雪红蔡星浦
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID NINGXIA ELECTRIC POWER COMPANY