Abstract
The simulation model of the overhead transmission line channel implemented in PSCAD software allowing researches of location signal propagation via overhead lines of the distribution networks 6–35 kV under conditions of single phase-to-ground fault is considered. The model reflectograms are compared with their appropriate experimental reflectograms registered under the laboratory and field conditions for the overhead lines during simulation of various types of the single phase-to-ground faults.
Highlights
The single phase-to-ground faults are the most repeated damages in distribution networks 6–35 kV
The simulation model of the overhead transmission line channel implemented in PSCAD software allowing researches of location signal propagation via overhead lines of the distribution networks 6–35 kV under conditions of single phase-to-ground fault is considered
The feature for operation of the medium voltage networks, which are distribution networks in the Russian Federation, consists in that they are operated with insulated or compensated neutral. This conditions low-low fault currents in case of single phase-to-ground fault that doesn’t allow using the methods to determine distances to the fault location based on the emergency mode parameters, which are widely used during monitoring of the power transmission lines with voltage of 110 kV and above [1]
Summary
The single phase-to-ground faults are the most repeated damages in distribution networks 6–35 kV. The feature for operation of the medium voltage networks, which are distribution networks in the Russian Federation, consists in that they are operated with insulated or compensated neutral. This conditions low-low fault currents in case of single phase-to-ground fault that doesn’t allow using the methods to determine distances to the fault location based on the emergency mode parameters, which are widely used during monitoring of the power transmission lines with voltage of 110 kV and above [1]. The simulation modelling with experimental inspection of the local signal propagation via overhead lines and cable aerial lines with voltage of 6–35 kV allows solving the fault detection problem for these lines
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