Power transmission pole tower leakage current-based fault positioning device and positioning method of power transmission line

Abstract

The invention relates to the field of power equipment monitoring, in particular to a power transmission pole tower leakage current-based fault positioning device and positioning method of a power transmission line. The fault positioning device is characterized by comprising positioning equipment and a positioning system, wherein the positioning equipment is arranged on a power transmission pole tower grounding conductor, the positioning system is arranged in an upper computer, the positioning equipment is used for presetting a geographic position parameter, acquiring a current signal of the power transmission pole tower grounding conductor, pre-processing the current signal, extracting an effective value, forming current data and transmitting the current data to the positioning system, thecurrent signal comprises a pole tower leakage current and a pole tower lightning current, the positioning system is used for analyzing size, frequency and waveform characteristics of the current data, judging whether the current data is a fault current or not and determining a fault position according to the positioning equipment which detects the fault current, and the positioning current comprises database and a positioning unit. The fault positioning device is high in positioning accuracy and is convenient to install and maintain.

Description

technical field [0001] The invention relates to the field of electric equipment monitoring, in particular to a transmission line fault location device and location method based on transmission tower leakage current. Background technique [0002] Faults such as short circuit, grounding, disconnection, and lightning strikes on the power grid transmission line need to find the fault location. At present, the means used for lines below 35kv in the market is a fault indicator, which is based on the current change of the line to find faults; above 35kv Most lines use the traveling wave ranging method to find the fault location; the fault indicator has a recognition accuracy of about 70% for short-circuit faults and about 40% for ground faults, and the product has limitations; The distance method equipment is expensive, the system is complicated, and the installation is difficult. The accuracy is better than the fault indicator, but it cannot achieve the desired effect. Existing p...

AI Technical Summary

Problems solved by technology

[0002] Faults such as short circuit, grounding, disconnection, and lightning strikes on the power grid transmission line need to find the location of the fault. At present, the means used for lines below 35kv on the market is a fault indicator, which is based on the current change of the line to find faults; above 35kv Most lines use the traveling wave ranging method to find the fault location; the fault indicator has a recognition accuracy of about 70% for short-circuit faults and about 40% for ground faults, and the product has limitations; The equipment price of the distance method is high, the system is complicated, and the installation is difficult. The accuracy is better than the fault indicator, but it cannot achieve the desired effect.

Existing products for fault location above 35kv use the principle and means to collect physical signals such as current, voltage, and characteristic waves from high-voltage wires. The disadvantages are that the installation cost is high and it is not easy to operate; only analysis of current Size, waveform, low positioning accuracy

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