STAND FOR CALCULATION OF SHORT CIRCUIT CURRENTS OF INTER-SUBSTATION ZONE OF TRACTION AC NETWORK Russian patent published in 2019 - IPC G01R31/02 

FIELD: electricity.

SUBSTANCE: invention relates to electric power supply system of AC traction network, namely to development of stand for calculation of short circuit currents of inter-substation section of traction AC network with two-way power supply. Essence: test bench circuit includes power supply unit and node mutual resistance Z1 of two units 110(220) kV of traction substations. One output of power supply is connected to the third beam of three-beam star of resistance of short circuit. Other output of power supply is connected to the first output of mutual resistance Z1, the second output of which is connected to connected to the second outputs Z2 and Z3 of supply lines 110(220) kV.

EFFECT: reduced error in calculation of short-circuit currents of feed lines of the overhead system, namely, obtaining accurate values of short-circuit currents of supply lines of traction substations and sectioning stations, which are necessary for high-quality adjustment and comprehensive analysis of relay protection behavior.

1 cl, 4 dwg