Section power supply and status measurement and control method of parallel-connected traction networks at tail end of double track railway

Abstract

The invention discloses a section power supply and status measurement and control method of parallel-connected traction networks at the tail end of a double track railway. By taking the section (10km) of the railway as a unit, a contact line sectioning and a sub-section post are additionally arranged at a section boundary. The sub-section post comprises a circuit breaker, a current transformer, a voltage transformer and a measurement and control unit. The circuit breaker and the current transformer connected with the circuit breaker in series are in bridge connection with the two ends of the contact line sectioning, and the sectioning is series-connected in the contact line. Through the arrangement of the sectioning and the sub-section post and the introduction of running status criterion, the running situation of charging trains on the traction networks can be timely and accurately mastered by operators on duty in a traction substation or dispatching room; by using the fault criterion, various faults can be timely and accurately found, distinguished and isolated, the continuous power supply and running of fault-free sections are ensured, the power outage scope is reduced to the maximum extent, and further the reliability of power supply of the traction networks is improved. The device has less investment and is easy to implement, not only is conveniently used by a new line, but also facilitates the transformation of an existing line.

Description

technical field [0001] The invention belongs to AC electrified railway power equipment, in particular to a segmental power supply and state measurement and control method for a parallel traction network at the end of a double-track railway. Background technique [0002] The traction power supply system of electrified railway is composed of traction substation and traction network, and the traction network is composed of catenary (T), track (R and ground). In order to improve the power supply capacity of the traction network, reduce the power supply voltage and energy loss and maintain the relative independence of the uplink and downlink catenary, the uplink and downlink catenary (T) are usually connected in parallel at the end of the double-track railway traction network, that is, the division. However, when a fault occurs in the upper (lower) catenary (T), the upper (lower) feeder and the partition substation of the traction substation will be tripped, so that all sections ...

AI Technical Summary

Problems solved by technology

However, when a fault occurs in the upper (lower) catenary (T), the upper (lower) feeder and the partition substation of the traction substation will be tripped, so that all sections of the upper (lower) catenary will be blacked out, which will Affect the normal power supply and operation of the train in the fault-free section, and reduce the reliability of power supply

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