Abstract
Detection of defective insulators from the general system of high-voltage insulators under operating voltage and located at certain distances from each other at distribution nodes and substations is a very difficult task, especially when the measuring sensors are arranged on one side at a distance of 5-10m from the high-voltage insulator. We have proposed a method for diagnosing high-voltage insulators, based on the use of a number of characteristics of partial discharges, which make it possible to separate operable and inoperable insulators. It has been determined that the most important and reliable characteristics of partial discharges when monitoring the technical condition of high-voltage insulators are changes in the phase intervals, intensity and repetition frequency corresponding to the most powerful partial discharges, compared with non-defective high-voltage insulators of the same type. To solve this problem, a measuring device was developed that allows remote periodic monitoring of the technical condition of high-voltage insulators of substations and power lines in operation in an automated mode based on measuring the characteristics of partial discharges.
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