Remote Testing for Defects in In-Service High-Voltage Insulators

Golenishchev-Kutuzov, A. V.; Golenishchev-Kutuzov, V. A.; Иванов, Д. А.; Mardanov, G. D.; Semennikov, A. V.

doi:10.1134/s1061830918100054

Cited by 8 publications

(3 citation statements)

References 3 publications

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“…The PD signal processing ends with the characteristics display: the amplitude and number of pulses in each phase interval and the distribution of the number of pulses by amplitude. The results of data processing were presented in the following articles [45][46][47].…”

Section: Diagnostics By Electromagnetic and Acoustic Recording Of Pdmentioning

confidence: 99%

Non-Contact Methods for High-Voltage Insulation Equipment Diagnosis during Operation

et al. 2021

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The article describes a complex of non-contact methods for remote diagnosis of high-voltage insulators as well as the two-channel method for remote diagnostics of the operating state of high-voltage insulators, based on the registration of partial discharges by electromagnetic and acoustic sensors. The presented device allows visual inspection and searches for faulty high-voltage equipment and a remote non-contact method of recording high-intensity electric fields of industrial frequency and their spatial distribution based on the electro-optical effect. The scheme of using the system for monitoring and diagnosing the technical condition of high-voltage support insulators of open switchgear is described. The results of experimental studies confirm the possibility of industrial applicability of the proposed method for non-contact remote diagnostics of the state of high-voltage insulators under operating voltage.

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Section: Diagnostics By Electromagnetic and Acoustic Recording Of Pdmentioning

confidence: 99%

Non-Contact Methods for High-Voltage Insulation Equipment Diagnosis during Operation

et al. 2021

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“…Therefore, the conditions for measuring a set of PD characteristics, to assess the HVI defects, are periodically improved, which is reflected in Russian and International standards. Moreover, at the beginning of the XXI century, it was theoretically predicted [3][4][5][6], and then experimentally established [7][8][9][10][11][12][13][14][15][16], that powerful PDs can also cause degradation of the HVI dielectric materials. However, the processes of PD generation under the action of high voltage are still poorly understood.…”

Section: Introductionmentioning

confidence: 99%

“…Presently, there have been studies about several physical models of the formation of VLPDs and their influence on the degradation of dielectric elements of high-voltage power equipment. The main attention was paid to the new generation of polymer dielectrics, which have found wide application in capacitors, transformers, cables, and other high-voltage devices [6][7][8]. Less attention was paid to the experimental study of the appearance of VLPDs and their influence on the development of defects in actual high-voltage dielectric elements.…”

Section: Introductionmentioning

confidence: 99%

Assessment of the Technical Condition of High-Voltage Insulators during Operation

Иванов¹,

Golenishchev-Kutuzov²,

Sadykov³

et al. 2022

Machines

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During the operation process of high-voltage insulators, the characteristics of assessing their technical state are evaluated by using remote contactless monitoring and by subsequent forecasting of their residual life based on the developed set of diagnostic parameters of critical defects. Special attention is paid to the challenges of the practical application for remote contactless monitoring of high-voltage insulators’ current operating state. Measurements of characteristics for partial discharges on high-voltage insulators with various types of critical defects taken by electromagnetic and acoustic sensors are described. Based on the measurements, it was found that the unusual properties of the PD begin to manifest themselves starting from the intensities q ≥ 1.5–2 nC, and their maximum intensity can reach 5–7 nC. Up to PD intensities q ≤ 3 nC, most parameters of PD characteristics measured by electromagnetic and acoustic sensors correspond with an accuracy of 70–90%. It was found that for small defects with sizes d ≤ 300 μm in HVI, the PD intensity does not exceed 100 pC and depends little on the size of the defect. However, with an increase in the size of defects above 0.4–0.6 mm, a sharp rise in the intensity of the emerging VLPD begins.

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