A method and device for transient homologous comparison of fault recording data

A technology of fault recorder and fault recorder, which is applied in the direction of fault location, measuring device, fault detection according to conductor type, etc. It can solve the problem of low reliability of comparison results and inaccurate transient homologous comparison method of fault record data Reflecting the characteristics of the transient process and other issues, achieving the effect of reliable comparison results and improving reliability

Active Publication Date: 2021-10-15
STATE GRID ANHUI ELECTRIC POWER CO LTD +2
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  • Claims
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Problems solved by technology

[0007] The technical problem to be solved by the present invention lies in the problem that the transient same-source comparison method of fault recording data in the prior art cannot accurately reflect the characteristics of the transient process, and the reliability of the comparison result is low

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  • A method and device for transient homologous comparison of fault recording data
  • A method and device for transient homologous comparison of fault recording data
  • A method and device for transient homologous comparison of fault recording data

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Embodiment Construction

[0067] The embodiments of the present invention are described in detail below. This embodiment is implemented on the premise of the technical solution of the present invention, and detailed implementation methods and specific operating procedures are provided, but the protection scope of the present invention is not limited to the following implementation example.

[0068] Such as figure 1 As shown, it is a schematic diagram of the main flow of a method for comparing the transient state of fault recording data provided by an embodiment of the present invention, a method for comparing the transient state of fault recording data with the same source, and the method includes:

[0069] Step S1: Obtain the fault recording data of the relay protection device and the fault recording data of the fault recorder within a preset time range, and then analyze the obtained fault recording data of the relay protection device and the fault recording of the fault recorder Wave data acquisitio...

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Abstract

The invention discloses a method and device for comparing fault record data with the same source in the transient state. The method includes: matching the fault record files of the relay protection device and the fault recorder; obtaining the fault record files of the relay protection device and fault recorder; Accurately align the transient data segment of the fault recording file of the oscilloscope; perform curve fitting on the transient data segment to realize accurate comparison of the data, and perform data early warning when the error exceeds the maximum value; the advantage of the present invention is: On-line monitoring and early warning of the accuracy of the sampling values ​​of the device or fault recording device, improving the reliability of the relay protection device.

Description

technical field [0001] The invention relates to the field of fault monitoring in power grids, and more specifically relates to a method and device for comparing transient states of fault recording data with the same source. Background technique [0002] In the power system, the transformer is an indispensable measurement unit in the power system. The error of the transformer is different in different measurement ranges, which directly affects the acquisition accuracy of the relay protection device and the fault recorder. With the continuous development of the smart grid, the scale of the system is getting bigger and bigger, the voltage level is getting higher and higher, and the structure is becoming more and more complex, especially the transient process affected by various factors when a fault occurs is very complicated. The sampling of the transformer Accuracy is most affected. [0003] At present, the acquisition units of relay protection devices and fault recorders bot...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/08
CPCG01R31/086G01R31/088
Inventor 叶远波陈实谢民王同文汪胜和程小平马伟王薇项忠华陈晓东董怀普郭欢
Owner STATE GRID ANHUI ELECTRIC POWER CO LTD
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