Ultrasonic Tunable Transducer on Domain Structures

Golenishchev-Kutuzov, A. V.; Golenishchev-Kutuzov, V. A.; Kalimullin, R. I.; Mardanov, G. D.; Potapov, A. A.

doi:10.1080/00150193.2012.747395

Cited by 6 publications

(5 citation statements)

References 12 publications

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“…The obtained data are recorded using special software, which records the spatial position of the electro- The electro-optical sensor ( 4) is nothing more than a ferroelectric crystal, on the surface of which a periodic domain structure (PDS) is formed [43]. To increase the sensitivity and resolution when locating field strength gradients, the resonance properties of the PDS are used for a given wavelength of the laser emitter (1) [44]. The average values of the alternating electric fields intensity, corresponding to the operating high voltage, are determined during experimental measurements for all diagnosed high-voltage insulators.…”

Section: Methodsmentioning

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: Methodsmentioning

confidence: 99%

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

et al. 2021

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“…Электрооптический датчик 4 представляет собой не что иное, как сегнетоэлектрический кристалл, на поверхности которого сформирована периодическая доменная структура (ПДС). Для повышения чувствительности и разрешающей способности при локации градиентов напряженности поля используются резонансные свойства ПДС для данной длины волны лазерного излучателя 1 [15]. В ходе экспериментальных измерений для всех диагностируемых высоковольтных изоляторов определяют средние значения напряженности переменных электрических полей, соответствующие рабочему высокому напряжению.…”

Section: рис 2 схема использования портативного устройстваunclassified

Using contactless methods of diagnostics of high electric fields

Golenischev-Kutuzov

Иванов

Potapov

et al. 2019

«Izvestiya vysshikh uchebnykh zavedenii. PROBLEMY ENERGETIKI»

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In the electric power industry of Russia and abroad, special attention is paid to the problem of an increase in the number of accidents caused by damage to high-voltage insulators in high-voltage equipment. An analysis of emergencies at substations and open switchgears [1- 2, 4] was carried out, which showed that in most cases the causes of damage to high-voltage insulators are natural aging in an applied electric field, overvoltage, and the presence of initial defects in the manufacture of high-voltage insulators. Based on this fact, we developed various methods of non-contact diagnostics of high-voltage insulators in order to identify defects at an early stage of their development. Particular attention was paid to the method of partial discharges because the characteristics of partial discharges provide information on the parameters of defects. The article describes a set of non-contact methods for remote diagnostics of high-voltage insulators; a 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; a device that allows visual inspection and the search for faulty high-voltage equipment; remote non-contact method for recording electric fields of high tension of industrial frequency, as well as their spatial orientation based on the electro-optical effect. We developed a mock-up of a portable diagnostic device for implementing research methods for high-voltage dielectric elements to diagnose their technical condition using the described complex of non-contact methods. The measuring device as part of a portable diagnostic device consists of a set of sensors for collecting diagnostic information detected by electromagnetic, acoustic and electro-optical sensors and a voltage phase signal applied to the studied highvoltage insulator. The simultaneous use of several sensors at once made it possible to increase the accuracy of localization of partial discharges in high-voltage insulators. Visualization of diagnostic results is possible at the control room in the form of amplitude-phase, frequencyphase and amplitude-frequency diagrams of the distribution of characteristics of partial discharges and on a portable device in the form of radiation intensity from the selected sensor. A portable diagnostic device made it possible in laboratory conditions to study electrophysical processes in various dielectric materials and products under the influence of strong alternating electric fields. A study was made of the features of defects on the rod and the terminal-terminal contact, a diagram of the electrophysical processes accompanying the emission of partial discharges was constructed, and the causes of their occurrence were established.

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“…It is therefore vital to monitor local overpotentials during the service life of insulation by remote and noncontact means. However, such means of control have yet to find wide application in high-voltage systems, though there have been attempts to create them [10].…”

Section: Measurement Of Characteristics and Analysis Of Partial Dischmentioning

confidence: 99%

“…A variety of organic polymers have been used as electrical insulating materials for electric power apparatus and cables. A large amount of work has been done on degradation of the insulating materials caused by partial discharges (PD) occurring at various defects in the polymer insulator itself and at the interface between electrodes and the insulating materials [1][2][3][4][5][6]. PD degradation is one of the most significant factors deciding the life of the insulation system.…”

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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Ultrasonic Tunable Transducer on Domain Structures

Cited by 6 publications

References 12 publications

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

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

Using contactless methods of diagnostics of high electric fields

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

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