System and method for monitoring surface-pollution electrical conductivity of insulator

Abstract

The invention discloses a system and a method for monitoring the surface-pollution electrical conductivity of an insulator. The system comprises a measuring unit, a data-acquiring unit, a data-processing unit and a computer, wherein the measuring unit, the data-acquiring unit, the data-processing unit and the computer are sequentially connected, the measuring unit, the data-acquiring unit and the data-processing unit are connected by adopting leads, and the data-processing unit is connected with the computer through a wireless communication network. The method comprises the following steps of obtaining a signal-source voltage signal and a fixed-resistor voltage signal from the measuring unit, obtaining the phase-angle difference of the two signals through respectively processing the two signals by the data-processing unit, and obtaining the electrical conductivity through the phase-angle difference. The system is a new system for monitoring the surface-pollution electrical conductivity of the insulator and has the advantages of simple measuring process and result accuracy and reliability.

Description

technical field [0001] The invention relates to the field of on-line monitoring, in particular to a system and method for monitoring the conductivity of insulator surface pollution. Background technique [0002] For a long time, my country's power network construction has continued to grow. Transmission line insulators have been in various environments for a long time, subject to strong electromagnetic fields in the air, sudden cooling and sudden heating, dirty particles, liquids, solids, etc. floating in the air, coupled with harsh conditions such as rain, fog, dew, ice melting, and snow melting. The electrical strength of the surface is greatly reduced. If pollution treatment is not carried out for a long time, pollution flashover accidents will easily occur. The loss of pollution flashover accidents is ten times that of lightning accidents, and the damage is huge. [0003] Monitoring the pollution conductivity on the surface of insulators is of great significance to anti...

AI Technical Summary

Problems solved by technology

This type of system for monitoring insulator surface pollution generally has large errors, and it is difficult to obtain correction coefficients. If high precision is required, the equipment is expensive

Another type of monitoring system for insulator surface pollution includes monitoring leakage current method and monitoring voltage distribution method. This monitoring system is seriously disturbed by high-voltage environment, and the processing process is complicated. The analysis requires certain experience and professional knowledge.

Images