Zinc oxide arrester on-line monitoring system

Abstract

The invention relates to a zinc oxide arrestor on-line monitoring system which comprises a microprocessor which is respectively connected with an A / D converting unit, a lightning stroke counting module and a GPRS communication module; the A / D converting unit is respectively connected with a leakage current sampling module and a voltage sampling module; the structure of the microprocessor comprises input / output interfaces, a counter and a serial communication interface; the input / output interfaces are connected with the A / D converting unit; the counter is connected with the lightning stroke counting module; the microprocessor is connected with the GPRS communication module; the microprocessor adopts a FPGA chip EPIC6Q240C8. The monitoring system dynamically monitors the insulating property of the zinc oxide arrestor under the operating voltage; the test results are accurate and reliable; the testing process is simple; and the test period is short; the zinc oxide arrestor on-line monitoring system is not easy to be affected by artificial and external factors, can provide long term data information of operation and performance deterioration of the zinc oxide arrestor, and has better practical value.

Description

technical field [0001] The invention belongs to the technical field of electrical performance monitoring, and relates to an online monitoring system for the insulation performance of an arrester, in particular to an online monitoring system for a zinc oxide arrester. Background technique [0002] Surge arrester is one of the important protection devices to ensure the safe operation of the power system, mainly used to limit the lightning overvoltage transmitted from the line or the internal overvoltage caused by operation. [0003] Because of its outstanding advantages in lightning protection performance, silicon carbide arresters are widely used in high-voltage equipment in power systems, but they have the following disadvantages: First, they only have the maximum lightning amplitude voltage limiting protection function, and there is no lightning steep wave protection function. The protection function is incomplete; the second is that there is no continuous lightning impact ...

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