Transient-state same-source data comparison method based on wave recording files

Abstract

The invention discloses a transient-state same-source data comparison method based on wave recording files. The method includes the steps that a channel mapping relation of an acquisition unit and a protection device is acquired; the wave recording files, generated by the same group of faults, of the protection device and the wave recording acquisition unit are obtained; the horizontal coordinateX1 of a sampling zero moment point is obtained; effective values, phase angles, deflection moment absolute time and switch value states of a previous cyclic wave, a later cyclic wave and two later cyclic waves of the same channel of the wave recording files of the same fault of the acquisition unit and the protection device are subjected to comparison and warning. By means of the method, the difference condition of a same data source is monitored in real time by obtaining the fault wave recording files of the acquisition unit and the protection device during each time of start, visual warningand prompting can be achieved, and the operation and maintenance efficiency of an intelligent transformer substation is improved.

Description

technical field [0001] The invention belongs to the technical field of electric power system relay protection, and in particular relates to a method for comparing transient homologous data based on wave recording files, and a technology for finding hidden faults in electric power systems by comparing the same data sources. Background technique [0002] The development of microcomputer protection and self-diagnosis technology of microcomputer automatic devices has laid a technical foundation for the state monitoring of protection equipment. Although the digital protection device itself has the basis for the implementation of condition monitoring, the relay protection device itself as a safety barrier for the power grid also includes AC input, DC circuit, operation control circuit, etc. If the scope of condition monitoring is limited to the device itself, it will It is difficult to fully reflect the reliability of the relay protection system. The state monitoring of protection...

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Problems solved by technology

Although the digital protection device itself has the basis for the implementation of condition monitoring, the relay protection device itself as a safety barrier for the power grid also includes AC input, DC circuit, operation control circuit, etc. If the scope of condition monitoring is limited to the device itself, it will It is difficult to fully reflect the reliability of the relay protection system. The state monitoring of protection must be considered as a systematic issue, or if the state monitoring of protection can include AC input, DC, and operating circuits, etc., on this basis It is more likely to be popularized in practical applications if the equipment operation status evaluation achieved

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