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Power transmission line single-end self-adaptive correction high-frequency fault positioning method and system

A transmission line and fault location technology, applied in the direction of fault location, information technology support system, etc., can solve the problems that the double-terminal traveling wave ranging method cannot be realized, and the fault location result cannot be obtained, so as to improve reliability and accuracy, The effect of high reliability and low reliability

Pending Publication Date: 2022-04-12
BINZHOU POWER SUPPLY COMPANY OF STATE GRID SHANDONG ELECTRIC POWER +1
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Problems solved by technology

[0004] However, for areas with limited conditions, if only a traveling wave ranging device can be installed at a single-ended station, the conventional double-ended traveling wave ranging method cannot be realized
At this time, it will not be possible to obtain accurate fault location results according to the conventional method

Method used

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  • Power transmission line single-end self-adaptive correction high-frequency fault positioning method and system
  • Power transmission line single-end self-adaptive correction high-frequency fault positioning method and system
  • Power transmission line single-end self-adaptive correction high-frequency fault positioning method and system

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Embodiment Construction

[0057] 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 only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0058] The units and algorithm steps of each example described in the embodiments disclosed in the high-frequency fault location method and system of transmission line single-end adaptive correction provided by the present invention can be realized by electronic hardware, computer software or a combination of the two, In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally descr...

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Abstract

The invention provides a high-frequency fault positioning method and system for single-end self-adaptive correction of a power transmission line, and the method comprises the steps: carrying out the distance measurement according to the time difference that a traveling wave generated by a fault point reaches a bus and then is reflected to the fault point, and carrying out the distance measurement based on the time difference that the fault point is reflected to the bus; recording the moment corresponding to the first maximum value point; determining a first maximum value, recording arrival moments of several subsequent maximum values, and obtaining distance measurement results of arrival of a plurality of traveling waves; carrying out distance measurement on the power transmission line by using an impedance method to obtain a fault distance; multiple groups of fault distances are measured, and distance measurement results are screened; when the distance measurement result is displayed as a near-end fault, the distance measurement result is directly used as a distance measurement result; according to the method, single-end fault location can be effectively achieved, self-adaptive correction can be conducted according to near-end faults or far-end faults, the reliability and accuracy of fault location are effectively improved, and meanwhile the adaptability of fault location to field conditions is greatly improved through the single-end method.

Description

technical field [0001] The invention relates to the field of traveling wave fault distance measurement, in particular to a high-frequency fault location method and system for transmission line single-end self-adaptive correction. Background technique [0002] With the continuous development of the power system, the voltage level and transmission energy of the transmission line are gradually increasing. The high-voltage transmission line is the lifeblood of the power system and bears the main responsibility for power transmission. After the high-voltage transmission line fails, quickly find the fault point, remove the fault, and restore the system. It is very important to operate the power supply normally, so as to save the manpower, material and financial resources consumed by fault line inspection, reduce the loss of power failure, and improve the reliability of power supply. [0003] Once a transmission line fails, it is necessary to determine the location of the fault as ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/08
CPCY04S10/52
Inventor 王晖徐滨颜森董高远黄延举夏瑞瑞胡东方顾华利李强杨春辉穆明亮董永强
Owner BINZHOU POWER SUPPLY COMPANY OF STATE GRID SHANDONG ELECTRIC POWER
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