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Power transmission line fault judging/locating method

A transmission line and fault judgment technology, which is applied in the field of fault judgment and location of power transmission lines, can solve the problems of inaccurate and untimely fault judgment of transmission lines, and achieve the effects of reducing the scope of power outages, reducing workload, and improving power supply reliability

Inactive Publication Date: 2014-12-24
STATE GRID CORP OF CHINA +1
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Problems solved by technology

[0003] In order to solve the problem of inaccurate and untimely fault judgment of existing power transmission lines, the present invention provides a method for judging and locating faults of electric power transmission lines

Method used

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  • Power transmission line fault judging/locating method

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Embodiment Construction

[0013] A method for judging and locating a fault in a power transmission line includes the following steps,

[0014] (1) Send the current data returned by the current and voltage collector attached to the transmission line to the background computer;

[0015] (2) First judge whether the received data has an overcurrent phenomenon, that is, an overload phenomenon. If the judgment is no, the next step will not be performed; if the judgment is yes, the next step will be judged;

[0016] (3) When there is an overcurrent phenomenon, first judge whether there is a short-circuit fault. The judgment conditions are: when the load current IL≤200A, if ΔI≥100A, it is judged that there is a short-circuit fault, otherwise it is judged that there is no short-circuit fault; when IL When >200A, if ΔI≥1 / 2*IL, and the fault duration is longer than 10S, it is judged that there is a short-circuit fault, otherwise it is judged that there is no short-circuit fault;

[0017] (4) Then judge whether t...

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Abstract

The invention specifically discloses a power transmission line fault judging / locating method and aims at solving the problem of inaccurate and untimely transmission line fault judgment at present. The power transmission line fault judging / locating method comprises the steps of sending the current data of a current / voltage acquirer to a background computer, firstly, determining whether an overcurrent phenomenon occurs, and if so, performing next step of judgment, judging whether a short circuit fault occurs first and then determining whether a ground fault occurs, and determining the location of a fault point according to the information of a line tower and the mounting position of the current / voltage acquirer. The power transmission line fault judging / locating method is capable of immediately providing the indication information on the fault position and the fault time, and therefore, the fault finding time is greatly shortened, the fault can be removed quickly, the power failure range can be reduced, the power failure time can be reduced and the power supply reliability can be improved; meanwhile, the workload of the fault line patrol personnel can be greatly reduced and the working efficiency can be improved.

Description

technical field [0001] The invention relates to the field of power transmission line maintenance, in particular to a method for judging and locating faults in electric power transmission lines. Background technique [0002] The current fault judgment mainly relies on installing a fault indicator at the line, or analyzing and judging the condition of the line offline, and mostly relying on the equipment itself, but for the laying of more and more power lines, operating factors, There are many emergencies such as natural factors and uncertain factors, and the equipment alone cannot cover all line conditions and cannot accurately reflect line faults. In the actual use of the fault indicator, there are often false alarms and missing alarms, which brings unnecessary troubles to the electric power maintenance personnel. Contents of the invention [0003] In order to solve the problem of inaccurate and untimely fault judgment of the existing power transmission line, the inventio...

Claims

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Application Information

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IPC IPC(8): G01R31/02G01R31/08
Inventor 郑秉公韩旭东高健
Owner STATE GRID CORP OF CHINA
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