Power transmission line zinc oxide lightning arrester on-line monitoring device based on wireless communication

Abstract

The invention discloses a power transmission line zinc oxide lightning arrester on-line monitoring device based on wireless communication. The power transmission line zinc oxide lightning arrester on-line monitoring device based on wireless communication mainly includes a real-time sampling module, and a signal amplification module which is connected with the output terminal of the real-time sampling module, wherein the output terminal of the signal amplification module is connected with the input terminal of a signal filtering module; the output terminal of the signal filtering module is connected with the input terminal of an A / D conversion module; the output terminal of the A / D conversion module is communicated with the input terminal of a control core module through a wireless Zigbee module; a power supply module is also connected with the input terminal of the control core module; and the output terminal of the control core module is connected with a liquid crystal display module,and at the same time is communicated with a remote monitoring center through a GPRS wireless transmission module. The power transmission line zinc oxide lightning arrester on-line monitoring device based on wireless communication can realize remote monitoring of the safety situation of an oxidizability lightning arrester on line, thus reducing the work load and guaranteeing personal safety of thelive working staff at the same time. The power transmission line zinc oxide lightning arrester on-line monitoring device based on wireless communication also can improve the safety factor of the zincoxide lightning arrester in advance, and can effectively improve safety of the power grid.

Description

technical field [0001] The invention relates to the technical field of on-line monitoring of arresters, in particular to an on-line monitoring device for zinc oxide arresters of transmission lines based on wireless communication. Background technique [0002] Because of the low level of low-voltage transmission lines, they are mostly erected in mountainous areas and gully areas, which are prone to lightning disasters caused by lightning strikes in substations and electrical equipment in power plants. In recent years, zinc oxide arresters have generally been installed on transmission lines in many areas of the domestic power grid. Zinc oxide surge arrester is an important equipment to ensure safe operation in the power system, and its own operation status will directly affect the safety of the power system. [0003] Metal oxide arresters are widely used in substations due to their advantages of no gap, no freewheeling and large flow capacity. However, under the action of th...

AI Technical Summary

Problems solved by technology

However, under the action of the operating voltage, the arrester will have a leakage current flowing, and the heat generated will increase the temperature of the resistor sheet. In this case, long-term work will cause the resistor sheet of the arrester to age; The resistor sheet will be affected by moisture and deteriorate. Once an overvoltage occurs in the system, the arrester may thermally collapse or even explode, and the arrester will lose its protective function. Therefore, it is necessary to continuously monitor the operation status of the arrester online to ensure the safe operation of the arrester

[0004] In the early days, the maintenance of arresters was generally carried out through power failure preventive tests, live tests, etc., but there were some problems. For example, the voltage applied to both sides of the arrester valve in the power failure test was different from the voltage and environment that the arrester was subjected to when it was working normally. This is because the measured data cannot accurately reflect the working conditions of the arrester; for example, the power failure test and live test have a long period, and the performance change of the arrester is a gradual process. The workload of the test is heavy, and there are great risks for the staff

Insufficient consideration of the economy of maintenance and basic maintenance of equipment can easily lead to over- or under-maintenance

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