Possibilities of increasing the sensitivity of current backup protection in symmetrical modes
This paper examines the problem of increasing the sensitivity of backup protection systems, specifically long-range backup protection systems (LRPS), at 110-220 kV branch substations (BSS) with relatively low-power power trans-formers (6.3-16 MVA). Short-circuit currents (SC) during faults on the low-voltage (LV) side...