Zobrazeno 1 - 10
of 30
pro vyhledávání: '"Kostić Vojin"'
Autor:
Kostić Vojin I.
Publikováno v:
Tehnika, Vol 76, Iss 4, Pp 467-472 (2021)
In this paper, practical and conceptual problems related to the way of suppressing or eliminating the influence of interference (at a frequency of 50 Hz) in an active high-voltage power facility are discussed. The problem is relevant in the context o
Externí odkaz:
https://doaj.org/article/bbcf679410764d0489100d320820c1f4
Autor:
Kostić Vojin I.
Publikováno v:
Tehnika, Vol 76, Iss 6, Pp 791-797 (2021)
The measurement of grounding system impedance of in-service power facilities is a very complex issue since the power system frequency interference and harmonic frequencies may adversely affect the measurement. Recently, to overcome this problem the F
Externí odkaz:
https://doaj.org/article/4561d17b1d00461ab90a881a4cf27467
Publikováno v:
Zbornik Radova: Elektrotehnički Institut "Nikola Tesla", Vol 30, Iss 30, Pp 31-41 (2020)
Ground impedance measurement in medium voltage substations, designed to operate in a predominantly cable network, is a complex research task. Namely, the inability to consider all the factors that can affect the measured value, in a situation where o
Externí odkaz:
https://doaj.org/article/e50219db4d6f4c09985243ef4fa8276a
Autor:
Kostić Vojin I.
Publikováno v:
Tehnika, Vol 74, Iss 1, Pp 97-102 (2019)
In this paper, a method for grounding impedance measurement is proposed. The method is experimentally validated in five substations rated voltage 35/10 kV. Compared to a standard measuring method, the basic benefits of the proposed method are: (a) th
Externí odkaz:
https://doaj.org/article/edcf084ad48a49df815f60c740339a93
Autor:
Kostić Vojin
Publikováno v:
Tehnika, Vol 72, Iss 2, Pp 243-247 (2017)
Geomagnetically induced currents (GICs) can cause a range of adverse consequences related to the normal functioning of a power system, e.g. the saturation of power transformers, unusual flows of active and reactive power, voltage fluctuations, the ap
Externí odkaz:
https://doaj.org/article/8cc179cd447c4650968ca3df1e5b46fc
Autor:
Kostić Vojin
Publikováno v:
Zbornik Radova: Elektrotehnički Institut "Nikola Tesla", Vol 27, Iss 27, Pp 11-19 (2017)
In case of a neutral-grounding resistor failure, the low impedance grounded network become ungrounded. This can lead to a very high level of transient overvoltages due to intermittent arcing faults. Also, in the dominant cable networks, there is a po
Externí odkaz:
https://doaj.org/article/d9cf1375ff1143b2b5bdefc4885575d0
Publikováno v:
Tehnika, Vol 70, Iss 3, Pp 481-486 (2015)
The first step in planning and designing of the proper grounding system, is the earth resistivity measurement. Measurements are carried out before the construction of the power facility. However, it is not an uncommon situation that during constructi
Externí odkaz:
https://doaj.org/article/cc9921df60f3445b93d4b970888eab7c
Publikováno v:
Zbornik Radova: Elektrotehnički Institut "Nikola Tesla", Vol 2015, Iss 25, Pp 31-39 (2015)
The paper presents the measured results of the resistivity values of dense ash slurry and return water mixture originating from the 'Kostolac A' thermal power plant. The four different ash slurry water mixtures with different ash concentrations are t
Externí odkaz:
https://doaj.org/article/86dc092bf3fb4da7b84dfb837a2608d3
Autor:
Kostić, Vojin I., Raičević, Nebojša B.
Publikováno v:
In Electric Power Systems Research February 2016 131:31-40
Autor:
Kostić, Vojin I., Raičević, Nebojša B.
Publikováno v:
In Electric Power Systems Research January 2016 130:59-66