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Abstract

The wide variety of electrode shapes and their arrangement relative to each other, as well as the possibility of corona discharge in the ambient air, have created prerequisites for the development of a number of new methods and corona discharge transducers designed to measure microwire parameters and linear dimensions of various objects. The principally new noncontact control method is based on the dependence of the corona discharge current value on the diameter of the corona wire placed inside the discharge chamber. This paper provides an overview of this method.
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Bibliography

[1] Sh.A.Bahtaev, A.A.Bokanova, G.V.Bochkareva, G.K.Sydykova. Fizika i tehnika koronnorazrjadnyh priborov. Almaty 2007.
[2] Sh.A.Bahtaev, G.K.Sydykova, A.Zh. Tojgozhinova, K.Kodzhabergenova. Koronnyj razrjad na mikrojelektrodah. Almaty 2017 – 78p.
[3] Sh.A.Bakhtaev, G.V Bochkareva., G.D.Musapirova, “The pulsed current mode of the negative corona,” Vestnik Kaz NTU, no. 3, pp. 212-217, 2010.
[4] T. Abiru, F. Mitsugi, T. Ikegami, K. Ebihara, S.-ichi Aoqui, K. Nagahama, “Environmental application of electrical discharge for ozone treatment of soil,” Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska, vol. 5, no. 4, pp. 42-44, 2015, https://doi.org/10.5604 /20830157.1176573.
[5] Z. Lv, S. Rowland, S.Chen, H. Zheng, K.Wu, “Modelling of partial discharge characteristics in electrical tree channels: Estimating the PD inception and extinction voltages,” IEEE Transactions on Dielectrics and Electrical Insulation, no. 25, pp. 1999-2010, 2018. doi: 10.1109/TDEI.2018.007175.
[6] M. Szadkowski, “New method of analysis of partial discharges,” Przegląd Elektrotechniczny, vol. 90 no. 3, 103-106, 2014. doi: 10.12915/pe.2014.03.21
[7] Sh.A. Bahtaev, G.V.Bochkarjova, G.I. Bokova, “Sposob kontrolja diametra mikroprovoloki,” Republic of Kazakhstan Patent no. 5070, Ofic.bjull., Prom.sobstv., no. 10, 1998.
[8] Sh.A.Bahtaev, G.D. Musapirova et al., “Ustrojstvo dlja izmerenija diametra mikroprovoloki,” Republic of Kazakhstan Patent no. 96543, Ofic.bjull., Prom.sobstv., no. 2, 30.01.2017.
[9] Predpatent RK №12038.Sposob izmerenija skorosti protjazhki mikroprovoloki // Bahtaev Sh.A. i dr.Opubl. Bjull.№9, 16.09.2002.
[10] G.V.Bochkareva, G.D.Musapirova, “The frequency characteristics of the differential conductivity of the corona in the high-frequency region,” in proc. The main problems of modern science: international materials. scientific-practical conf. - Bulgaria, pp. 92-94, 2010.
[11] Sh.A.Bakhtaev, G.V.Bochkareva, G.D. Musapirova, “Areas of existence of anomalies in the high-frequency conductivity of the positive corona,” Tomsk State University Journal. AIPP no. 2, pp. 18-23, 2010.

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Authors and Affiliations

Aliya S. Tergeussizova
1
Shabden A. Bakhtaev
2
Waldemar Wójcik
3
Bekmurza H. Aitchanov
4
Gulzada D. Mussapirova
2
Aynur Zh. Toygozhinova
5

  1. Kazakh National University named after al-Farabi, Almaty, Kazakhstan
  2. Almaty University of Power Engineering and Telecommunications, Almaty, Kazakhstan
  3. Lublin University of Technology, Lublin
  4. Suleyman Demirel University, Almaty, Kazakhstan
  5. Kazakh Academy of Transport and Communications named after M.Tynyshpayev, Almaty, Kazakhstan
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Abstract

The paper presents an overview of a method of nanosecond-scale high voltage pulse generation using magnetic compression circuits. High voltage (up to 18 kV) short pulses (up to 1.4 μs) were used for Pulsed Corona Discharge generation. In addition, the control signal of parallel connection of IGBT and MOSFET power transistor influence on system losses is discussed. For a given system topology, an influence of core losses on overall pulse generator efficiency is analysed.

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Authors and Affiliations

Michał Balcerak
Ryszard Pałka
Marcin Hołub
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Abstract

Solar blind UV cameras are not theoretically supposed to be sensitive to solar light. However, there is practically always some sensitivity to solar light. This limited solar sensitivity can sometimes make it impossible to detect the weak emission of a corona target located on the solar background. Therefore, solar sensitivity is one of the crucial performance parameters of solar blind UV cameras. However, despite its importance, the problem of determining solar sensitivity of solar blind UV cameras has not been analysed and solved in the specialized literature, so far. This paper presents the concept (definition, measurement method, test equipment, interpretation of results) of measuring solar sensitivity of solar blind UV cameras.
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Bibliography

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  6. ICI Infrared Cameras Inc. https://www.infraredcameras.com (2020)
  7. Chrzanowski, K. & Chrzanowski, W. Analysis of a blackbody irradiance method of measurement of solar blind UV cameras’ sensitivity. Opto-Electron. Rev. 27, 378–384 (2019). https://doi.org/10.1016/j.opelre.2019.11.009
  8. Cheng, H. et al. Performance characteristics of solar blind UV image intensifier tube. in Proc. SPIE – International Symposium on Photoelectronic Detection and Imaging 2009: Advances in Imaging Detectors and Applications 7384 (2009). https://doi.org/10.1117/12.834700
  9. Coetzer, C., West, N., Swart, A. & van Tonder, A. An investigation into an appropriate optical calibration source for a corona camera. in IEEE International SAUPEC/RobMech/PRASA Conference 1–5 (2020). https://doi.org/10.1109/saupec/robmech/prasa48453.2020.9041014
  10. Coetzer, C. et al. Status quo and aspects to consider with ultraviolet optical versus high voltage energy relation investigations. in Proc. SPIE – Fifth Conference on Sensors, MEMS, and Electro-Optic Systems 11043, 1104317 (2019). https://doi.org/10.1117/12.2501251
  11. Du Toit, N. S. Calibration of UV-sensitive camera for corona detection. (Stellenbosch University, South Africa, 2007). http://hdl.handle.net/10019.1/2920
  12. Pissulla, D. et al. Comparison of atmospheric spectral radiance measurements from five independently calibrated systems. Photochem. Photobiol. Sci. 8, 516–527 (2009). https://doi.org/10.1039/b817018e
  13. Clack, C. T. M. Modeling solar irradiance and solar PV power output to create a resource assessment using linear multiple multivariate regression. J. Appl. Meteorol. Climatol. 56, 109–125 (2017). https://doi.org/10.1175/JAMC-D-16-0175.1
  14. G03 Committee. Tables for Reference Solar Spectral Irradiances: Direct Normal and Hemispherical on 37 Tilted Surface. http://www.astm.org/cgi-bin/resolver.cgi?G173-03R20 https://doi.org/10.1520/G0173-03R20
  15. Tohsing, K., Klomkliang, W., Masiri, I. & Janjai, S. An investigation of sky radiance from the measurement at a tropical site. in AIP Conference Proceedings 1810, 080006 (2017). https://doi.org/10.1063/1.4975537
  16. Chen, H.-W. & Cheng, K.-S. A conceptual model of surface reflectance estimation for satellite remote sensing images using in situ reference data. Remote Sens. 4, 934–949 (2012). https://doi.org/10.3390/rs4040934
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Authors and Affiliations

Krzysztof Chrzanowski
1 2
ORCID: ORCID
Bolesław Safiej
2

  1. Military University of Technology, Institute of Optoelectronics, 2 gen. Kaliskiego St., 00-908 Warsaw, Poland
  2. INFRAMET, Bugaj 29a, Koczargi Nowe, 05-082 Stare Babice, Poland
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Abstract

On the basis of a unipolar corona discharge, a method of non-contact and continuous measurement of linear parameters of thin and ultra-thin dielectric fibres and optical fibres (10 to 125 microns) in the process of their manufacture was developed. The measurement method differs from the commonly known methods by high accuracy and reliability of measurement and resistance to changes in the electrical characteristics of the discharge gap and the state of ambient air.
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Authors and Affiliations

Aliya S. Tergeussizova
1
Shabden A. Bakhtaev
2
Waldemar Wojcik
3
Ryszard Romaniuk
4
Bekmurza H. Aitchanov
5
Gulzada D. Mussapirova
2
Aynur Zh. Toygozhinova
6

  1. Kazakh National University named after al-Farabi, Almaty, Kazakhstan
  2. Almaty University of Power Engineering and Telecommunications, Almaty, Kazakhstan
  3. Lublin Technical University, Poland
  4. Warsaw University of Technology, Poland
  5. Suleyman Demirel University, Almaty, Kazakhstan
  6. Kazakh Academy of Transport and Communications named after M.Tynyshpayev, Almaty, Kazakhstan
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Abstract

High voltage DC insulation plays an important role, especially in power transmission systems (HVDC) but also increasingly on medium voltage levels (MVDC). The space charge behavior under DC voltage has great importance on electrical insulation reliability. This paper reports investigations of encapsulated space charge in homo-multilayer dielectric materials using the pulsed electro-acoustic (PEA) method. The charge has been introduced on the homo-layer interface by corona sprinkling prior to encapsulation. Two doses of charge density were accumulated on the dielectric surface in two types of dielectric materials Kapton and LDPE. The polarization DC voltage was applied in 2 min intervals in steps corresponding to an effective electric field strength in a range of 8-40 kV/mm for Kapton and 10-50 kV/mm for LDPE. The PEA-based detected space charge was compared at the initial, reference stage, prior to charge accumulation, and after corona sprinkling of defined charge density. The evaluation was based on the PEA time-dependent charge distributions and charge profiles referring to the DC polarization field strength. The goal of the experiment was to identify the relationship and the character of the known sprinkled and encapsulated charge inside homo-layered materials using the PEA method. According to the observations, the ratio between sprinkled charge densities is proportional to the encapsulated, charge densities measured by the PEA method on the interfacial homo-layer for the Kapton specimen. In the case of LDPE, a fast decrease of interfacial charge was observed, especially at a higher polarization field above 10 kV/mm. The encapsulation of the known charge amount can be extended to different types of multilayer material. The presented methodology might be used also for extended calibration of the PEA measurement system.
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Authors and Affiliations

Marek Florkowski
1
ORCID: ORCID
Maciej Kuniewski
1
ORCID: ORCID

  1. AGH University of Science and Technology, Department of Electrical and Power Engineering, al. Mickiewicza 30, 30-059 Kraków, Poland

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