Station building auxiliary power supply

Abstract

A station building auxiliary power supply device (1) comprises: a power conversion unit (11) that is electrically connected to a contact wire (2), which supplies electric power to a railway vehicle (4), that is electrically connected to a power distribution line (103), to which a load (6) is connected, and that is capable of bidirectional conversion between first power, which is for the contact wire (2), and second power, which can be supplied to the load (6); an output mode setting unit (15) that sets, on the basis of whether or not the contact wire is in a power shortage state, an output mode indicating the direction in which the power conversion unit (11) outputs electric power; and a power conversion control unit (16) that controls the power conversion unit (11) according to the output mode set by the output mode setting unit (15), wherein when the contact wire is in a power shortage state, the output mode setting unit (15) sets the output mode to an emergency mode, in which the power conversion unit (11) converts the second power into the first power and supplies the converted first power to the contact wire (2).

Claims

1. A power conversion unit is electrically connected to an overhead line supplying power to a railway vehicle and a commercial power distribution line to which a load is connected, and is capable of bidirectionally converting between a first power, which is the power of the overhead line, and a second power, which is the power that can be supplied to the load. An output mode setting unit sets an output mode that indicates the direction in which the power conversion unit outputs power, based on whether the overhead line is in a power shortage state that would render the railway vehicle unable to run. A power conversion control unit controls the power conversion unit according to the output mode set in the output mode setting unit, Equipped with, The output mode setting unit sets an emergency mode, which is the output mode in which, when the overhead line is in a power shortage state, the power conversion unit converts the second power to the first power and supplies the converted first power to the overhead line. Auxiliary power supply unit for the station building.

2. The output mode setting unit sets the normal mode, which is the output mode in which, when the overhead line is not in a power shortage state, the power conversion unit converts the first power to the second power and supplies the converted second power to the load connected to the distribution line of the commercial power system. A station building auxiliary power supply device according to claim 1.

3. The output mode setting unit receives overhead line abnormality information indicating the power shortage state of the overhead line, which includes either power outage information for the overhead line, abnormality information for the feeder line equipment that supplies power to the overhead line, or voltage drop information for the overhead line. A station building auxiliary power supply device according to claim 1 or 2.

4. The system includes an overhead line abnormality determination unit that acquires the overhead line voltage measured by a voltage sensor that measures the voltage of the overhead line, and determines that the overhead line is in a power shortage state if the acquired overhead line voltage is below a predetermined threshold, The output mode setting unit sets the output mode based on the determination result of the overhead line abnormality determination unit. A station building auxiliary power supply device according to claim 1 or 2.

5. The first power is DC power, and the power conversion unit has an inverter circuit capable of bidirectional conversion. A station building auxiliary power supply device according to claim 1 or 2.

6. The first power is AC power, and the power conversion unit has a bidirectional converter and a bidirectional inverter. A station building auxiliary power supply device according to claim 1 or 2.

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