Power distribution system for moving body

Patent metadata

Field	Value
Publication number	US-11962142-B2
Application number	US-202017790138-A
Country	US
Kind code	B2
Filing date	Apr 16, 2020
Priority date	Apr 16, 2020
Publication date	Apr 16, 2024
Grant date	Apr 16, 2024

Abstract

The present disclosure includes: a power generator; and a power line through which power generated by the power generator is transmitted to a load. The power line between the power generator and the load is provided with: a current limitation device configured to, when detecting occurrence of a fault current, limit the fault current; and a current interruption device configured to interrupt current heading for the load, in conjunction with the limitation of the fault current performed by the current limitation device.

First claim

The invention claimed is:

1. A power distribution system for a moving body, the power distribution system comprising:
a power generator driven by an engine used for the moving body; and
a power line through which power generated by the power generator is transmitted to a load, wherein
the power line between the power generator and the load is provided with
a current limitation device configured to, when detecting occurrence of a fault current, limit the fault current, the current limitation devise being at least partially enclosed in a sealed container and operating even under an atmospheric pressure at a high altitude lower than the atmospheric pressure on the ground, and
a current interruption device configured to interrupt current heading for the load, in conjunction with the limitation of the fault current performed by the current limitation device.

2. The power distribution system for a moving body according to claim 1 , the power distribution system further comprising:
a current detector on the power line; and
a protective controller configured to detect occurrence of the fault current on the basis of a current detection value from the current detector,
transmit, to the current limitation device, an operation command to limit the fault current, and
transmit, when the fault current is limited, an interruption command to the current interruption device.

3. The power distribution system for a moving body according to claim 2 , wherein the protective controller is set to have a function of giving an output adjustment command to the power generator when detecting occurrence of the fault current.

4. The power distribution system for a moving body according to claim 3 , wherein the power generator adjusts, on the basis of the output adjustment command, an output amount of the power generator according to a fluctuation amount of the load.

5. The power distribution system for a moving body according to claim 1 , wherein
each of the current limitation device and the current interruption device is set to have a function of detecting occurrence of the fault current, and,
when the fault current occurs, the current limitation device limits the fault current, and then the current interruption device disconnects the power line.

6. The power distribution system for a moving body according to claim 1 , wherein the current limitation device has a configuration in which at least one semiconductor switch and at least one current limitation element are connected in parallel.

7. The power distribution system for a moving body according to claim 6 , wherein a resistor or an arrester is used as the current limitation element.

8. The power distribution system for a moving body according to claim 6 , wherein, in a case of providing the current limitation device on an AC line, a current limitation element obtained by connecting a resistor and an inductance element is used as the current limitation element.

9. The power distribution system for a moving body according to claim 1 , wherein the current limitation device has a configuration in which a mechanical switch, a semiconductor switch, and a current limitation element are connected in parallel.

10. The power distribution system for a moving body according to claim 9 , wherein
in a normal case, current is conducted through the mechanical switch, and,
upon occurrence of the fault current, current is transferred from the mechanical switch to the semiconductor switch first, and then current is transferred from the semiconductor switch to the current limitation element.

11. The power distribution system for a moving body according to claim 1 , wherein a DC reactor is connected on the power generator side relative to the current limitation device.

12. The power distribution system for a moving body according to claim 1 , wherein a grounding device is provided on the load side relative to the current limitation device.

13. The power distribution system for a moving body according to claim 1 , wherein an opening/closing device is provided as the current interruption device.

14. The power distribution system for a moving body according to claim 1 , wherein
the power line includes
a main line connected to the power generator, and
a plurality of load lines having branched off from the main line and connected to the loads,

the main line is provided with the current limitation device and the current interruption device, and
the load lines are provided with the respective current interruption devices.

15. The power distribution system for a moving body according to claim 14 , wherein
the power generator is an AC power generator,
an AC/DC converter is connected to the main line,
a DC/AC converter is connected to each load line, and
each of the AC/DC converter and the DC/AC converter serves as the current interruption device.

16. The power distribution system for a moving body according to claim 1 , wherein
the power line includes
a main line connected to the power generator, and
a plurality of load lines having branched off from the main line and connected to the loads,

the main line is provided with the current interruption device, and
the load lines are provided with the respective current limitation devices and the respective current interruption devices.

17. A power distribution system for a moving body, the power distribution system comprising:
a power generator; and
a power line through which power generated by the power generator is transmitted to a load, wherein
the power line between the power generator and the load is provided with
a current limitation device configured to, when detecting occurrence of a fault current, limit the fault current,
a current interruption device configured to interrupt current heading for the load, in conjunction with the limitation of the fault current performed by the current limitation device,

a current detector on the power line; and
a protective controller configured to
detect occurrence of the fault current on the basis of a current detection value from the current detector,
transmit, to the current limitation device, an operation command to limit the fault current, and
transmit, when the fault current is limited, an interruption command to the current interruption device,

wherein the protective controller is set to have a function of giving an output adjustment command to the power generator when detecting occurrence of the fault current.

18. The power distribution system for a moving body according to claim 17 , wherein the power generator adjusts, on the basis of the output adjustment command, an output amount of the power generator according to a fluctuation amount of the load.

19. A power distribution system for a moving body, the power distribution system comprising:
a power generator; and
a power line through which power generated by the power generator is transmitted to a load, wherein
the power line between the power generator and the load is provided with
a current limitation device configured to, when detecting occurrence of a fault current, limit the fault current,
a current interruption device configured to interrupt current heading for the load, in conjunction with the limitation of the fault current performed by the current limitation device,

wherein a DC reactor is connected on the power generator side relative to the current limitation device.

20. The power distribution system for a moving body according to claim 19 , the power distribution system further comprising:

Assignees

• Mitsubishi Electric Corp

Inventors

• Horinouchi Katsuhiko
• Hotta Katsuki
• Takuno Tsuguhiro

Classifications

• H02H3/105 Primary

  responsive to excess current and fault current to earth · CPC title

• B60R16/03 Primary

  for supply of electrical power to vehicle subsystems {or for (circuit arrangements for charging batteries H02J7/00)} · CPC title

• H02H9/02

  responsive to excess current {(current limitation for voltage regulators G05F1/573; disconnection after limiting H02H3/025)} · CPC title

• H02J2207/20

  Charging or discharging characterised by the power electronics converter · CPC title

• H02H3/025

  Disconnection after limiting, e.g. when limiting is not sufficient or for facilitating disconnection · CPC title