TY  - JOUR
AU  - Vereb, Laslo
AU  - Osmokrović, Predrag V.
AU  - Vujisić, Miloš Lj.
AU  - Dolicanin, Cemal
AU  - Stankovic, Koviijka
PY  - 2009
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3634
AB  - 20 kV distribution networks with all its components, such as transformers, switches, cables etc., have existed and been operating safely for many decades. From an economic point of view, it would be convenient to replace the transformer-motor combination by just a single 20 kV asynchronous motor, even if the motor itself were more expensive. The cost of a transformer, facilities and maintenance gained in this way would easily cover the extra costs of a motor. Efficiency considerations also make elimination of the step-down transformer desirable. Furthermore, modern technological advances make the production of 20 kV asynchronous motors possible, which is proved by the existence of 32 kV generators. The main problem lies in overcoming the differences between the construction of the aforementioned network equipment and the high-voltage asynchronous motor. This paper analyzes the weak points in the insulation system of an asynchronous motor, and proposes improvements allowing motor supply voltage to be increased to 20 kV.
T2  - IEEE Transactions on Dielectrics and Electrical Insulation
T1  - Prospects of Constructing 20 kV Asynchronous Motors
VL  - 16
IS  - 1
SP  - 251
EP  - 256
DO  - 10.1109/TDEI.2009.4784574
ER  - 

@article{
author = "Vereb, Laslo and Osmokrović, Predrag V. and Vujisić, Miloš Lj. and Dolicanin, Cemal and Stankovic, Koviijka",
year = "2009",
abstract = "20 kV distribution networks with all its components, such as transformers, switches, cables etc., have existed and been operating safely for many decades. From an economic point of view, it would be convenient to replace the transformer-motor combination by just a single 20 kV asynchronous motor, even if the motor itself were more expensive. The cost of a transformer, facilities and maintenance gained in this way would easily cover the extra costs of a motor. Efficiency considerations also make elimination of the step-down transformer desirable. Furthermore, modern technological advances make the production of 20 kV asynchronous motors possible, which is proved by the existence of 32 kV generators. The main problem lies in overcoming the differences between the construction of the aforementioned network equipment and the high-voltage asynchronous motor. This paper analyzes the weak points in the insulation system of an asynchronous motor, and proposes improvements allowing motor supply voltage to be increased to 20 kV.",
journal = "IEEE Transactions on Dielectrics and Electrical Insulation",
title = "Prospects of Constructing 20 kV Asynchronous Motors",
volume = "16",
number = "1",
pages = "251-256",
doi = "10.1109/TDEI.2009.4784574"
}

Vereb, L., Osmokrović, P. V., Vujisić, M. Lj., Dolicanin, C.,& Stankovic, K.. (2009). Prospects of Constructing 20 kV Asynchronous Motors. in IEEE Transactions on Dielectrics and Electrical Insulation, 16(1), 251-256.
https://doi.org/10.1109/TDEI.2009.4784574

Vereb L, Osmokrović PV, Vujisić ML, Dolicanin C, Stankovic K. Prospects of Constructing 20 kV Asynchronous Motors. in IEEE Transactions on Dielectrics and Electrical Insulation. 2009;16(1):251-256.
doi:10.1109/TDEI.2009.4784574 .

Vereb, Laslo, Osmokrović, Predrag V., Vujisić, Miloš Lj., Dolicanin, Cemal, Stankovic, Koviijka, "Prospects of Constructing 20 kV Asynchronous Motors" in IEEE Transactions on Dielectrics and Electrical Insulation, 16, no. 1 (2009):251-256,
https://doi.org/10.1109/TDEI.2009.4784574 . .

TY  - JOUR
AU  - Stankovic, Koviijka
AU  - Pešić, Miroslav
AU  - Osmokrović, Predrag V.
AU  - Vujisić, Miloš Lj.
PY  - 2008
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3501
AB  - This paper investigates, through theory and experiment, the applicability of the results obtained in laboratory tests of relatively short duration performed on model structures, as a part of the process of designing high-voltage equipment intended for lasting exploitation. Possibilities and limititions of applying these results to practical structures are examined using the methods of mathematical statistics. Special attention is devoted to the influence of electrode surface enlargement and pulse load (overvoltage) prolongation on the statistical behaviour of the pulse breakdown voltage random variable, expressed in the form of the enlargement law. In the theoretical part of the paper, the general four-dimensional (space-time) enlargement law is derived, along with its simplified three-dimensional (surface-time) variant. In the part of the paper related to the experiment, performed with the aim of testing the applicability of the derived surface-time enlargement law to SF6 gas-insulated two-electrode systems, a description of the experimental equipment and procedure is provided, along with the details of measurement data processing. Comparison of experimental results with those predicted by the surface-time enlargement law proved its validity for a two-electrode configuration with a homogenous and radial electric field, insulated by SF6 gas under pressure (with gas pressure as a parameter).
T2  - IEEE Transactions on Dielectrics and Electrical Insulation
T1  - Surface-time enlargement law for gas breakdown
VL  - 15
IS  - 4
SP  - 994
EP  - 1005
DO  - 10.1109/TDEI.2008.4591220
ER  - 

@article{
author = "Stankovic, Koviijka and Pešić, Miroslav and Osmokrović, Predrag V. and Vujisić, Miloš Lj.",
year = "2008",
abstract = "This paper investigates, through theory and experiment, the applicability of the results obtained in laboratory tests of relatively short duration performed on model structures, as a part of the process of designing high-voltage equipment intended for lasting exploitation. Possibilities and limititions of applying these results to practical structures are examined using the methods of mathematical statistics. Special attention is devoted to the influence of electrode surface enlargement and pulse load (overvoltage) prolongation on the statistical behaviour of the pulse breakdown voltage random variable, expressed in the form of the enlargement law. In the theoretical part of the paper, the general four-dimensional (space-time) enlargement law is derived, along with its simplified three-dimensional (surface-time) variant. In the part of the paper related to the experiment, performed with the aim of testing the applicability of the derived surface-time enlargement law to SF6 gas-insulated two-electrode systems, a description of the experimental equipment and procedure is provided, along with the details of measurement data processing. Comparison of experimental results with those predicted by the surface-time enlargement law proved its validity for a two-electrode configuration with a homogenous and radial electric field, insulated by SF6 gas under pressure (with gas pressure as a parameter).",
journal = "IEEE Transactions on Dielectrics and Electrical Insulation",
title = "Surface-time enlargement law for gas breakdown",
volume = "15",
number = "4",
pages = "994-1005",
doi = "10.1109/TDEI.2008.4591220"
}

Stankovic, K., Pešić, M., Osmokrović, P. V.,& Vujisić, M. Lj.. (2008). Surface-time enlargement law for gas breakdown. in IEEE Transactions on Dielectrics and Electrical Insulation, 15(4), 994-1005.
https://doi.org/10.1109/TDEI.2008.4591220

Stankovic K, Pešić M, Osmokrović PV, Vujisić ML. Surface-time enlargement law for gas breakdown. in IEEE Transactions on Dielectrics and Electrical Insulation. 2008;15(4):994-1005.
doi:10.1109/TDEI.2008.4591220 .

Stankovic, Koviijka, Pešić, Miroslav, Osmokrović, Predrag V., Vujisić, Miloš Lj., "Surface-time enlargement law for gas breakdown" in IEEE Transactions on Dielectrics and Electrical Insulation, 15, no. 4 (2008):994-1005,
https://doi.org/10.1109/TDEI.2008.4591220 . .