Transmission line based on transfer function correlation of electromagnetic time reversal and network fault positioning method

A transfer function, time inversion technology, applied in digital transmission systems, data exchange networks, distribution line transmission systems, etc., can solve problems such as limited positioning effect, increased monitoring system complexity and cost, etc.

Active Publication Date: 2020-06-19
XI AN JIAOTONG UNIV
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Problems solved by technology

However, the multi-terminal positioning system requires high-precision time synchronization and remote data communication for the measurement data of each terminal, which undoubtedly increases the complexity and cost of the monitoring system. At the same time, the positioning effect is limited by the GPS (Global Position System, GPS) time precision

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  • Transmission line based on transfer function correlation of electromagnetic time reversal and network fault positioning method
  • Transmission line based on transfer function correlation of electromagnetic time reversal and network fault positioning method
  • Transmission line based on transfer function correlation of electromagnetic time reversal and network fault positioning method

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Embodiment Construction

[0070] In order to enable those skilled in the art to better understand the solutions of the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only It is an embodiment of a part of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0071] It should be noted that the terms "first" and "second" in the description and claims of the present invention and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate ...

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Abstract

The invention discloses a transmission line and network fault positioning method based on transfer function correlation of electromagnetic time reversal, and the method comprises the steps: 1) settinga single observation point at any terminal in a transmission line and a network, measuring and recording a fault high-frequency transient signal in a limited duration, and obtaining a measurement signal; 2) establishing a transmission line simulation model in the step 1), and obtaining fault transient signals generated at different positions through simulation, namely obtaining simulation signals; 3) carrying out time synchronization operation at the starting moment on the simulation signal obtained in the step 2) and the measurement signal obtained in the step 1) by utilizing a signal synchronization method, and eliminating deviation in the sampling process; 4) filtering the simulation signal and the measurement signal by using a signal filtering method, and extracting transfer functionsin the simulation signal and the measurement signal; 5) calculating a correlation coefficient of a transfer function between the simulation signal and the measurement signal, and judging a fault position by searching a maximum value of the correlation coefficient. The method can realize online monitoring based on a single observation point so as to cover the whole transmission line network, and has a relatively high practical value in power transmission line fault positioning.

Description

technical field [0001] The invention belongs to the technical field of power transmission line fault location, and in particular relates to a transmission line and network fault location method based on transfer function correlation of electromagnetic time inversion. Background technique [0002] The transmission line is the key infrastructure for power transmission and distribution of the power grid. During its operation, it will inevitably fail due to various reasons such as natural environment, human factors, and insulation deterioration. Finding the fault point after a line fault occurs is a key technology to ensure the safe and stable operation of the power grid. Accurate and efficient fault location can not only reduce the burden of line inspection, save a lot of manpower and material resources, but also speed up the restoration of power supply of the line and reduce the loss caused by power outages. Economic losses. With the construction and development of my country...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B3/46H04B3/54H04L12/24H04L12/26H04L7/00
CPCH04B3/46H04B3/54H04L7/0016H04L41/0677H04L43/50
Inventor 谢彦召和少寅
Owner XI AN JIAOTONG UNIV
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