Power transmission line online fault monitoring method and system

Abstract

The invention provides a power transmission line online fault monitoring method and system. The method comprises the following steps: integrating operation parameters and environmental parameters of the power transmission line under different faults to form a fault historical database, and constructing a neural network identification model of the power transmission line under different faults according to the fault historical database; collecting operating parameters and environmental parameters of the power transmission line, inputting the operating parameters and the environmental parametersinto the neural network identification model, and analyzing faults of the power transmission line; judging the fault occurrence reason according to the fault analysis result, and carrying out image acquisition on the possible fault points of the power transmission line; and performing feature extraction and analysis on the acquired images, and obtaining fault occurrence points according to analysis results. According to the power transmission line online fault monitoring method and the system thereof, the fault point can be judged at the first time, the fault searching time is shortened, thefault is eliminated as early as possible, the power transmission is recovered, and the power supply reliability is improved.

Description

technical field [0001] The disclosure relates to the field of power transmission lines for cooling and heating technology, and in particular to an online fault monitoring method and system for power transmission lines. Background technique [0002] The statements in this section merely mention background art related to the present disclosure and do not necessarily constitute prior art. [0003] Overhead transmission lines are the main components of the power system and transmission network. They undertake most of the industrial and domestic power transmission tasks. The most prone to failure part. Common transmission line faults are mainly divided into transient faults and permanent faults according to their nature. Transient faults mainly include flashover caused by lightning overvoltage and short circuit caused by birds, etc. Permanent faults are mostly caused by climate or equipment itself, etc. Causes, such as instantaneous overvoltage breakdown of transmission line in...

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Problems solved by technology

[0004] As far as the inventor knows, at present, distributed fault location monitoring systems are mostly used in transmission lines to solve the problems of inaccurate fault location and difficult to accurately identify fault causes in traditional monitoring methods.

However, practical experience shows that due to the large distance measurement error, the long distance of transmission lines, and the large number of T-connected lines in some lines, it is difficult to find fault points. The time required for existing devices is often long, generally several hours or even longer, making The time spent on finding the location of the fault point is much longer than the time spent on repairing the fault, which seriously affects the speed of power supply restoration and emergency repair, expands the loss of power consumption, and easily causes the expansion of the accident

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