Wireless-synchronization-technology-based integrated on-line lightning arrester resistive current monitoring apparatus

Abstract

The invention belonging to the technical field of on-line monitoring of a lightning arrester especially relates to a wireless-synchronization-technology-based integrated on-line lightning arrester resistive current monitoring apparatus that is used for gapless metal-oxide lightning arrester. The wireless-synchronization-technology-based integrated on-line lightning arrester resistive current monitoring apparatus comprises a housing, a resistor piece, and an electronic timekeeper and mechanical timekeeper unit. The resistor piece and the electronic timekeeper and mechanical timekeeper unit are installed in the housing; and a front window is arranged on the housing. The electronic timekeeper and mechanical timekeeper unit consists of an electronic timekeeper and a mechanical timekeeper that are connected in series. The series-connection electronic timekeeper and mechanical timekeeper are connected in parallel with the resistor piece. The mechanical timekeeper is displayed from the front window. And an aviation plug is arranged at the lower cover of the housing. The monitoring apparatus has advantages of simple structure, reasonable design, and advanced structure. On-line monitoring of resistive currents of lightning arresters with all voltage levels is realized; the resistive currents of lightning arresters are measured precisely; and thus the operation information of the lightning arresters is obtained accurately.

Description

technical field [0001] The invention belongs to the technical field of online monitoring of lightning arresters, and in particular relates to an online monitoring device for the resistive current of an integrated lightning arrester based on wireless synchronization technology. Online monitoring device. Background technique [0002] Surge arresters are an important overvoltage protection device and a powerful guarantee for the safe operation of power systems. If the operating condition of the arrester is poor, the protection performance will decrease, which will affect the safety of the power system. Therefore, it is necessary to monitor the operating condition of the arrester. [0003] The early lightning arrester monitoring method used mechanical ammeters and lightning strike counting meters to monitor the operation of the arrester. This method has many disadvantages: the monitoring data has large errors and cannot be transmitted remotely, and the workload of the operating...

AI Technical Summary

Problems solved by technology

[0006] With the vigorous development of the smart grid, on-site lightning arresters are equipped with online monitoring devices, and the secondary signal of the PT voltage transformer is introduced into the device. As the online monitoring device runs longer in the outdoor environment, the interior is prone to moisture or damage. It is very easy to cause secondary faults of PT and lead to accidents. Instead of using the voltage reference method, the online monitoring device can only measure the trend of resistive current change, and cannot obtain the true value of the resistive current of the arrester.

The real value of the resistive current of the arrester can be obtained by measuring with a resistive current measuring instrument, but this work is labor-intensive, dangerous, and may perform multiple operations on the PT, which has potential safety hazards

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