Fork line polarity conversion circuit of APM direct current traction power supply system

By designing a switch-line polarity conversion circuit in the APM DC traction power supply system, and using the powerless zone and parallel circuit breaker to achieve polarity conversion, the short circuit faults caused by polarity conversion in the APM system and the low driving scheduling efficiency are solved, and more continuous and efficient driving operation is achieved.

CN119659423APending Publication Date: 2025-03-21CRRC PUZHEN BOMBARDIER TRANSPORTATION SYST CO LTD
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Patent Information

Application Number
CN202411751229.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-02
Publication Date
2025-03-21

AI Technical Summary

Technical Problem

In APM type DC power supply system, the '△'-shaped track structure causes the power supply rail to have opposite polarities, and short circuit failures will occur when the train passes, and the polarity conversion requires a stop-off power conversion, which affects the driving scheduling efficiency.

Method used

A switch-line polarity conversion circuit of APM DC traction power supply system was designed. The circuit polarity conversion was realized by setting up a power-free zone and a parallel vehicle depot circuit breaker on the switch line, and the driving indicator light and electrical segmented parameters were set to ensure the safety and continuity of the polarity conversion process.

Benefits of technology

The polarity conversion of the APM system is realized without stopping and power outage, which improves the driving efficiency of automatic collection and departure, is suitable for automatic return to the warehouse and departure, and reduces short-circuit failures caused by human factors.

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Abstract

The invention discloses a branch line polarity conversion circuit of an APM direct current traction power supply system. A vehicle depot line is connected with a main line through two branch lines; the two branch lines are respectively provided with a non-electric area; the two ends of the non-electric area disconnect a circuit through electric sections; the vehicle depot line is connected with the direct current bus through two vehicle depot circuit breakers which are connected in parallel; the electric connection polarities of the two vehicle depot circuit breakers are opposite, and logic interlocking is carried out. By the adoption of the technical scheme, circuit polarity conversion of the whole vehicle depot is achieved, departure and collection operation can be more continuous, the driving scheduling efficiency is improved, and the method is suitable for automatic garage returning and departure road crossing; a driving indicating lamp is arranged to intuitively prompt a driver of a track electrification state; a short-circuit fault caused by human factors can be avoided through the arrangement of the non-power area; the electrified state of the track is transmitted to a signal system, and when the track state does not meet the conditions of automatic train receiving and departure, the train can stop and wait in front of a non-electrified area.
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