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A method for remote diagnosis of suspended porcelain insulators based on the pulse method is proposed. The form of test pulses for diagnosing isolators in the area of the DC contact network is determined. The main diagnostic parameters of the supplied and recorded pulses are given and calculated. The possibility of determining the distance to the faulty garland depending on the amplitude value of the diagnostic pulse has been revealed. The change of the peak value of the pulse decay depending on the resistance of the insulator string is considered. The proposed method allows localizing the position of a faulty insulator string at the DC power supply section, and subsequently reliably determining the faulty insulator in the festoon.

The article deals with the distribution of the electrostatic field around the garland of porcelain suspension insulators containing defects. Achieved the distribution simulation of the electrostatic field around insulators in the software package Elcut. We get a picture of field distribution around the insulators for the environment with different dielectric constants. A comparative analysis of simulation results and experimental studies on the basis of which revealed the possibility of diagnosing the parameters of insulators of the electrostatic field.