JPH028628U - - Google Patents

Description

[Brief explanation of the drawing]

FIG. 1 is a circuit diagram of a conventional DC electric railway power supply device, and FIG. 2 is a circuit diagram showing an embodiment of this invention. 20...Power transmission line, 23a, 23b...First and second forward power converters, 24...DC bus, 25a, 2
5b, 26a, 26b...First and second thyristor switches for power running, 38, 39...Thyristor circuit breaker for regeneration, 29a, 29b, 30a, 30b
...First and second electric train tracks, 29c, 30c...Third electric train tracks, 31a, 31b, 32a, 32b...
...dead section, 33a, 33b, 34a,
34b...Diode, 37...Electric car.

Claims (1)

[Scope of utility model registration request] It is divided by a plurality of forward power converters that are operated in parallel and have a fault current cutoff function that converts AC power into DC power, a DC bus bar connected to the output side of these forward power converters, and a dead section from the DC bus bar. a power running thyristor switch inserted in series in each of the electric lines connecting the first and second electric train lines, and another dead section provided at a predetermined distance from the dead section on either one of the first and second electric line. a regenerative thyristor circuit breaker inserted in the electric circuit connecting the third overhead contact line and the DC bus; the cathode side of each thyristor circuit breaker is connected to the anode side of the thyristor circuit breaker; , a pair of diodes each having its anode side connected to the cathode side of the thyristor switch for power running, respectively.