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Complex power grid fault accurate positioning method considering wave velocity attenuation and time error

A power grid fault and time error technology, applied in fault location, complex mathematical operations, design optimization/simulation, etc., can solve the problems of traveling wave fault location accuracy, synchronization error, sampling accuracy and wave velocity attenuation, etc., to reduce synchronization error , the effect of a reliable positioning method

Pending Publication Date: 2022-07-22
CHINA UNIV OF MINING & TECH
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Problems solved by technology

[0004] In view of the above situation, in order to solve the problem that the existing traveling wave fault location accuracy is affected by synchronization error, sampling accuracy and wave velocity attenuation, the present invention provides a complex power grid fault accurate location method considering wave velocity attenuation and time error

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  • Complex power grid fault accurate positioning method considering wave velocity attenuation and time error
  • Complex power grid fault accurate positioning method considering wave velocity attenuation and time error
  • Complex power grid fault accurate positioning method considering wave velocity attenuation and time error

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Embodiment Construction

[0065] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments; based on the The embodiments of the present invention, and all other embodiments obtained by those of ordinary skill in the art without creative work, fall within the protection scope of the present invention.

[0066] It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the drawings, and the words "inner" and "outer" ” refer to directions towards or away from the geometric center of a particular part, respectively.

[0067] like figure 1 , figure 2 As shown, the technical scheme adopted by the present invention is as follows:

[0068] A typic...

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Abstract

The invention discloses a complex power grid fault accurate positioning method considering wave velocity attenuation and time error, and the method comprises the steps: firstly building the equality constraints of wave velocity, time and distance based on a traveling wave transmission rule; secondly, according to a wave head time error range and a wave velocity attenuation rule, an average wave velocity variable is introduced, and inequality constraints are formed; thirdly, taking the minimum deviation degree of the wave head time and the wave head form center as a target, introducing a shortest path critical mark variable, constructing a shortest distance function from a fault point to a measurement point, and establishing a traveling wave fault positioning model; and finally, solving an optimal solution of the model to obtain a fault distance. The invention relates to the field of complex power grid fault accurate positioning, and the method can effectively reduce the influence of the synchronization error, the sampling precision and the wave velocity attenuation on the positioning precision, and achieves the rapid, accurate and reliable positioning of the fault under the complex power grid.

Description

technical field [0001] The invention relates to the field of precise positioning of complex power grid faults, in particular to a complex power grid fault precise positioning method considering wave velocity attenuation and time error. Background technique [0002] At present, there are mainly single-ended method, double-ended method and wide-area method for traveling wave positioning method of transmission network. Among them, the single-ended method and the double-ended method mainly focus on the fault location of a single line. With the increasingly complex topology of the transmission network and the development of synchronization technology, some scholars have proposed the wide-area traveling wave method, which comprehensively utilizes the whole network or local measurement information, improves information utilization, and achieves more accurate fault location. . At present, the synchronization accuracy and sampling rate of the actually used traveling wave measuremen...

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Application Information

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IPC IPC(8): G01R31/08G06F17/16G06F30/20
CPCG01R31/086G01R31/088G06F17/16G06F30/20
Inventor 梁睿王全金王子龙王昊蒋成瑞李英恺彭楠张鹏
Owner CHINA UNIV OF MINING & TECH
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