Thyristor rectification traction power supply system and protection method
A traction power supply system and thyristor technology, applied in the field of transportation, can solve problems such as short mechanical and electrical life, and achieve the effects of reducing damage and short-circuit current.
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[0034] The following takes the subway project of Line 3 in a certain city as an example: the line adopts a 1500V DC traction power supply system, with a total length of 18.84km and a total of 9 traction substations. The catenary resistance in the up (down) direction is 0.0135Ω / km, and the rail resistance in the up (down) direction is 0.0137Ω / km. Two 12-pulse rectifier units are used in parallel to form an equivalent 24-pulse operation.
[0035] figure 1 Shown is a schematic structural diagram of the traction substation in the embodiment of the present invention, in which two adjacent traction substations SS k and SS k+1 . Traction substation SS k including traction transformer TT k , Three-phase AC incoming circuit breaker QFJ k , thyristor rectifier U k , DC incoming line isolating switch QZS k , DC bus B k , DC feeder isolating switch QSZ k,1 、QSZ k,2 Wait. DC feeder isolating switch QSZ k,1 and QSZ k,2 Connect catenary OCS, negative isolating switch QSZ k* One...
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