Remote testing of high-voltage insulators

Golenishchev-Kutuzov, A. V.; Golenishchev-Kutuzov, V. A.; Mardanov, G. D.; Khusnutdinov, R. A.; Евдокимов, И. А.

doi:10.1134/s1061830916080064

Cited by 9 publications

(6 citation statements)

References 2 publications

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“…Thus, the performed bench tests and field tests of the developed methodology and measuring complex [6,12] showed the real possibility of its use for monitoring the state of HVIs in operation.…”

Section: Discussionmentioning

confidence: 92%

“…Corresponding to them are the defects, most often in the form of spherical air cavities inside dielectrics and plane-parallel air layers inside the dielectric and at the "dielectric -electrode" interface (disk cavities). The detection of extra-large PD (extralarge PD) and the developed set of diagnostic parameters for their detection have already been reported before [11][12][13][14][15]. However, the physical principles of the development of defects in polymeric materials under the action of extra-large PD have not been developed, and models of progressing defects and residual life based on new diagnostic parameters have not been built [16][17].…”

Section: Control Of Defects Using Partial Dischargesmentioning

confidence: 99%

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Monitoring System of High Voltage Dielectric Equipment

Golenishchev-Kutuzov

Иванов

et al. 2021

E3S Web Conf.

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Based on the research of the main causes of dielectric elements premature aging and electrical destruction of primary dielectric elements in high voltage electrical equipment the complex method for remote monitoring of said electrical equipment has been developed. The developed mobile diagnostic device is allowing detection and periodic control of the most dangerous defects. The set of diagnostic parameters of defects was experimentally obtained by using three physical methods (electromagnetic, optical, and acoustic), and allows to inspect the origin and development of defects, and to determine residual life of dielectric elements with a sufficient degree of reliability. The researched characteristics of the kinetics of reduction in operating parameters of polymer insulators permitted the development of the detection of accelerated increase in defects under the influence of ultra-large partial discharges.

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Section: Discussionmentioning

confidence: 92%

Section: Control Of Defects Using Partial Dischargesmentioning

confidence: 99%

Monitoring System of High Voltage Dielectric Equipment

Golenishchev-Kutuzov

Иванов

et al. 2021

E3S Web Conf.

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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%

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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“…As is known from theoretical and experimental studies [7,8], surface cracks on or bulk cavities in the dielectric rod are the main types of defects in highvoltage insulators (HVI). Another type of defects is loose connection between the core and the end terminal.…”

Section: Introductionmentioning

confidence: 99%

Effect of partial discharges on the operating condition of high-voltage insulators

Golenishchev-Kutuzov

Иванов

et al. 2019

E3S Web Conf.

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The features of the dielectric rod defects and the rod-electrod defects of polymer insulators were investigated by using the developed complex method of contactless remote diagnostics of high-voltage insulators health, which includes the initial detection of local areas with elevated electric field gradients as well as measurement of a set of partial discharges characteristics. The radiation of extra-large partial discharges was detected and partial discharges features were investigated. According to the measurement results, a diagram was constructed for the electro-physical processes that accompany the emission of extra-large partial discharges; and the reasons for their occurrence were established.

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Remote testing of high-voltage insulators

Cited by 9 publications

References 2 publications

Monitoring System of High Voltage Dielectric Equipment

Monitoring System of High Voltage Dielectric Equipment

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

Effect of partial discharges on the operating condition of high-voltage insulators

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