Power distribution network overhead line detection device, fault detection system and method

Abstract

The invention relates to a power distribution network overhead line detection device, and a fault detection system and method. A power distribution network overhead line detection device comprises a probe, a temperature acquisition module, an electric field acquisition module, a data management module, a current sampling module, a wireless communication module and an electricity taking power supply module. The electricity taking power supply module comprises an overpower protection unit; the electric field acquisition module is connected with the probe and the data management module, and the temperature acquisition module is used for acquiring a temperature of the probe and is connected with the data management module; the current sampling module and the wireless communication module are connected with the data management module; and the electricity taking power supply module takes power from a power distribution network and supplies power to the data management module. The detection device provided by the invention can ensure that detection voltage sampling data and detection current sampling data are still stable under the condition of a fault current or a lightning stroke current, data accuracy of the data is ensured, and a fault point searching speed is improved.

Description

technical field [0001] The invention relates to the field of distribution network fault monitoring, in particular to a distribution network overhead line detection device, a fault detection system and a method. Background technique [0002] As a clean and efficient secondary energy source, electric energy is closely related to national economic construction and people's daily life, and the power system that collects electric energy production, transmission, distribution and consumption, as a pillar industry of the national economy and people's livelihood, is very important to all walks of life. With the progress of modern society, the rapid development of economy and the sharp increase of power load, higher and higher requirements are put forward for the reliability, stability, safety and quality of power system. [0003] With the construction of distribution automation system, the fault handling level of distribution network has been improved to a certain extent. The singl...

AI Technical Summary

Problems solved by technology

However, there are many problems in domestic online monitoring terminals and their use: First, they do not have the performance of transient state recording, and their ability to transmit high-frequency signals is poor, so useful fault component information will be lost, and faults cannot be accurately judged Lines and fault sections; the second is that the installation conditions are limited. Some online monitoring terminals can only be installed in places with voltage transformers because they need to use line voltage information, and they have no means of measuring them; the third is The research on the configuration of online monitoring terminals has always been a blank in China. The practice of configuring fault indicators in various parts of the country is generally to install one at intervals. The installation of such a large number of fault indicators is not only costly, but also improves the efficiency of fault location. It is not obvious. Secondly, the online monitoring terminal cannot isolate the faulty section. It is necessary to study the problem of the cooperative use of the online monitoring terminal and the line selection equipment.

[0005] Therefore, in terms of the existing distribution line detection device, the response to the shock current signal is not enough, and it is very prone to self-fault, which needs to be improved and improved.

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