Active Earth Fault Current Compensation in Medium Voltage Grids

2019 ◽  
Author(s):  
Pavel Smirnov ◽  
Thomas Ellinger ◽  
Sergey Kharitonov
Keyword(s):  
Fault Current ◽  
Current Compensation ◽  
Medium Voltage ◽  
Earth Fault

Model for the calculation of harmonics in the residual earth fault current of medium voltage systems

2017 ◽  
Vol 2017 (1) ◽  
pp. 775-779 ◽  
Author(s):  
Karla Frowein ◽  
Uwe Schmidt ◽  
Gernot Druml ◽  
Peter Schegner
Keyword(s):  
Fault Current ◽  
Medium Voltage ◽  
Earth Fault

Selection of actuating quantity for digital single-phase-to-earth fault current protection of medium-voltage cable systems

Vestnik IGEU ◽  
2015 ◽  
pp. 21-29
Author(s):  
M.S. Al-Homidi ◽  
◽  
Т.Yu. Vinokurova ◽  
O.A. Dobriagina ◽  
V.A. Shuin ◽  
...  
Keyword(s):  
Single Phase ◽  
Fault Current ◽  
Medium Voltage ◽  
Earth Fault ◽  
Cable Systems ◽  
Selection Of

scholarly journals Modeling Features of a Single Phase-to-Earth Fault in a Medium Voltage Overhead Transmission Line

2020 ◽  
Vol 4 (2) ◽  
pp. 127-138
Author(s):  
Ismael Saeed ◽  
Kamal Sheikhyounis
Keyword(s):  
Transmission Line ◽  
Transmission Lines ◽  
Single Phase ◽  
Single Frequency ◽  
Mathematical Representation ◽  
Medium Voltage ◽  
Overhead Transmission Line ◽  
Earth Fault ◽  
Distributed Parameters ◽  
Selection Of

The modeling and calculation of a single phase-to-earth fault of 6 to 35 kV have specific features when compared with circuits with higher nominal voltages. In this paper, a mathematical analysis and modeling of a 3-phase overhead transmission line with distributed parameters consisting of several nominal T-shaped, 3-phase links with concentrated parameters replaced by 1 nominal T-shaped link were carried out. Further analysis showed that not accounting for the distributed nature of the line parameters did not cause significant errors in the assessment of the maximum overvoltage in the arc suppression in single phase-to-earth faults, and that sufficient accuracy insures the representation of the line by only 1 nominal T-shaped, 3-phase link. Such a modeling technique makes it impossible to identify the location of single-phase faults, which is the property of higher harmonic amplification of individual frequencies. Chain equivalent schemas with constant parameters are valid for a single frequency, thereby providing an opportunity to study the nature of the wave process by the discrete selection of parameters. Next in the mathematical representation, we consider the overhead transmission lines as lines with distributed parameters.

ENSYSTROB—Resistive Fault Current Limiter Based on Coated Conductors for Medium Voltage Application

2011 ◽  
Vol 21 (3) ◽  
pp. 1209-1212 ◽  
Author(s):  
Steffen Elschner ◽  
Andrej Kudymow ◽  
Stefan Fink ◽  
Wilfried Goldacker ◽  
Francesco Grilli ◽  
...  
Keyword(s):  
Coated Conductors ◽  
Fault Current ◽  
Fault Current Limiter ◽  
Medium Voltage ◽  
Voltage Application ◽  
Current Limiter
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