A railroad electric power management system includes a service management system, a station management system and a control system. The service management system performs service management of railroad vehicles. The station management system performs operation management of a station facility. The control system controls the service management system and the station management system such that a sum of first electric power consumption and second electric power consumption is to be equal to or less than a certain electric-power regulation value. the first electric power consumption is consumed by the railroad vehicles. The second electric power consumption is consumed by the station facility.

A railroad electric power management system includes a service management system, a station management system and a control system. The service management system performs service management of railroad vehicles. The station management system performs operation management of a station facility. The control system controls the service management system and the station management system such that a sum of first electric power consumption and second electric power consumption is to be equal to or less than a certain electric-power regulation value. the first electric power consumption is consumed by the railroad vehicles. The second electric power consumption is consumed by the station facility.

A control method and system of neutral section passing of multi-locomotive short broke trains. Distance traveled by a train after a primary multiple unit enters a neutral section is calculated in real time, so that a neutral section passing procedure of a secondary multiple unit is effectively controlled, thereby solving the problem that when the multi-locomotive short broke trains operate with double-raised pantographs, if the distance between the two pantographs is shorter than the length of a neutral zone of a neutral section and longer than the length of a no-electricity zone of the neutral section, when the two pantographs pass through the neutral sections, the two pantographs will span the two neutral sections and generate an interphase short circuit. The method improves safety of the EMU when it passing neutral section and ensure that the EMU can reliably pass through the neutral section with double-raised pantographs. The present invention has the advantages of being safe, reliable, easy to implement and convenient to promote and apply.

A control method and system of neutral section passing of multi-locomotive short broke trains. Distance traveled by a train after a primary multiple unit enters a neutral section is calculated in real time, so that a neutral section passing procedure of a secondary multiple unit is effectively controlled, thereby solving the problem that when the multi-locomotive short broke trains operate with double-raised pantographs, if the distance between the two pantographs is shorter than the length of a neutral zone of a neutral section and longer than the length of a no-electricity zone of the neutral section, when the two pantographs pass through the neutral sections, the two pantographs will span the two neutral sections and generate an interphase short circuit. The method improves safety of the EMU when it passing neutral section and ensure that the EMU can reliably pass through the neutral section with double-raised pantographs. The present invention has the advantages of being safe, reliable, easy to implement and convenient to promote and apply.

A power supply for a power line includes a synchronization module having a receiver configured for receiving a clock signal from a satellite-based positioning system and an oscillator configured for generating a periodic signal synchronized to the received clock signal. The power supply includes an inverter module having an inverter configured for supplying an AC voltage to the power line, receiving the periodic signal from the synchronization module, and controlling the inverter using the received periodic signal as a synchronization reference signal for the supplied AC voltage. The power supply further includes a power exchange control module configured for: monitoring an active power flow P from the inverter module to the power line, determining whether the active power flow P satisfies a reverse-flow condition, and when the reverse-flow condition is determined, adapting at least one of a phase and an output voltage of the supplied AC voltage.

A power supply system for electric vehicle comprising; power; a first power line; and a second power line; wherein the output of the high voltage side from the power line is fed to the high voltage side of each of the first power line and the second power line, the output of the low voltage side from the power line is fed to the low voltage said of each of the first power line and the second power line, the first power line and the second power line are connected at their far ends and a power supply system for electric vehicle that supplies electric power to an electric vehicle by means of said first power line or said second power line. the first power line and the second power line have a bypass line that interconnects from the power to the connection at the far end.

A power supply system for electric vehicle comprising; power; a first power line; and a second power line; wherein the output of the high voltage side from the power line is fed to the high voltage side of each of the first power line and the second power line, the output of the low voltage side from the power line is fed to the low voltage said of each of the first power line and the second power line, the first power line and the second power line are connected at their far ends and a power supply system for electric vehicle that supplies electric power to an electric vehicle by means of said first power line or said second power line. the first power line and the second power line have a bypass line that interconnects from the power to the connection at the far end.

A method for analyzing a correlation between rail transit and direct current (DC) magnetic bias of a transformer includes the steps of, A: obtaining a current of a feed cable and a DC magnetic bias current: measuring the feed cable current in rail transit and the DC magnetic bias current of a transformer in a power grid within a certain period by a monitoring apparatus; B: calculating a characteristic quantity of the feed current within the measurement period based on the obtained current of the feed cable; C: calculating a characteristic quantity of the DC magnetic bias current within the measurement period based on the DC magnetic bias current; and D: calculating a support degree and a confidence coefficient based on the calculated characteristic quantity of the feed current and the calculated characteristic quantity of the DC magnetic bias current, and generating a correlation rule.

A bus breaker control circuit for a railway vehicle includes a close relay, an open relay, a power supply circuit for a bus breaker, a power supply circuit for the hold relay, and a delay module; the power supply circuit for the hold relay comprises a normally-closed contact of the open relay, an auxiliary normally-open contact of the bus breaker, and the hold relay sequentially connected in series to a train power supply; the power supply circuit for the bus breaker comprises a normally-open contact of the hold relay and the bus breaker sequentially connected in series to the train power supply; and the delay module is connected in parallel with the hold relay, normally-closed contacts of the delay module are connected in series to the power supply circuit for the close relay.

A bus breaker control circuit for a railway vehicle includes a close relay, an open relay, a power supply circuit for a bus breaker, a power supply circuit for the hold relay, and a delay module; the power supply circuit for the hold relay comprises a normally-closed contact of the open relay, an auxiliary normally-open contact of the bus breaker, and the hold relay sequentially connected in series to a train power supply; the power supply circuit for the bus breaker comprises a normally-open contact of the hold relay and the bus breaker sequentially connected in series to the train power supply; and the delay module is connected in parallel with the hold relay, normally-closed contacts of the delay module are connected in series to the power supply circuit for the close relay.