Russian Electrical Engineering

, Volume 89, Issue 1, pp 42–46 | Cite as

Power Supplies for Electronic High-Voltage Measuring-Current Transformers

Article
  • 1 Downloads

Abstract

A power supply for electronic high-voltage measuring-current transformers with extraction of energy from the measured current that flows through a high-voltage line has been considered. A magnetic core of the supply transformer from the windings of which the necessary power is extracted is mounted on the line for this purpose. When the line current changes over a wide range, the supply transformer should have a quickly saturated magnetic core. It has been shown that, to reduce the losses and decrease the loading of the elements of a power-supply circuit in a wide current range, a ballast load should be introduced in the circuit of a secondary winding. Three variants of the ballast load have been compared: resistive, capacitive, and in the form of a transistor-current limiter. The results of simulations in the VisSim software have been considered for all three variants, as well as for the case of absence of a ballast load in the power-supply circuit. The simulations were carried out for the lowest and highest measured currents, as well as for the line short-circuit mode. The results of simulations have shown the advantages of a power supply based on a saturated transformer with a transistor-current limiter. A variant of a circuit of a transistor-current limiter has been suggested.

Keywords

power supply electronic current transformers high-voltage measurements in an electrical network 

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    GOST (State Standard) R MEK 60044-8-2010: Instrument Transformers. Part 8: Electronic Current Transformers, Moscow: Standartinform, 2012.Google Scholar
  2. 2.
    Afanas’ev, V.V., Zubkov, V.P., and Krastina, A.D., Optoelectronic current transformers, Elektrichestvo, 1970, no. 7.Google Scholar
  3. 3.
    Volovich, G.I., Skhemotekhnika analogovykh i analogotsifrovykh elektronnykh ustroistv (Circuitry of Analog and Analog-Digital Electronic Devices), Moscow: Dodeka-XXI, 2011.Google Scholar
  4. 4.
    D’yakonov, V.P., VisSim+Mathcad+MATLAB. Vizual’noe matematicheskoe modelirovanie (Vis-Sim+Mathcad+MATLAB. Visual Mathematical Modeling), Moscow: SOLON-Press, 2004.Google Scholar
  5. 5.
    Volovich, G.I., Modeling of the current convertor in the VisSim software package, Silovaya Elektron., 2014, no. 3.Google Scholar
  6. 6.
    Yashin, I.A., Kazantsev, Yu.A., Kopylova, L.A., and Gevorkyan, V.M., RF Patent 2483409, Byull. Izobret., 2013, no. 15.Google Scholar
  7. 7.
    Tietze, U. and Schenk, C., Halbleiter-Schaltungstechnik, Berlin: Springer-Verlag, 2002, vol. 1.MATHGoogle Scholar

Copyright information

© Allerton Press, Inc. 2018

Authors and Affiliations

  1. 1.OOO ChelenergopriborChelyabinskRussia

Personalised recommendations