Title:
ELECTRIC POWER TRANSFORMATION SYSTEM, CONTROL METHOD FOR ELECTRIC POWER TRANSFORMATION SYSTEM, AND ELECTRIC RAILWAY SYSTEM
Document Type and Number:
WIPO Patent Application WO/2022/153776
Kind Code:
A1
Abstract:
This invention provides a low-cost, highly reliable electric power transformation system which simultaneously uses a substation having a low power reception capacity and an electric power storage device and can ensure electric power performance required for a train to travel while suppressing electric power reception from an electric power system to a rated capacity or less. The electric power transformation system is characterized by comprising: a first AC-DC power conversion device which converts AC power from an electric power system to DC power; a first DC power conversion device which converts the DC power from the first AC-DC power conversion device to DC power in a DC portion; a second DC power conversion device which transmits and receives electric power to and from a feeder line; and an electric power storage device which is connected between the first DC power conversion device and the second DC power conversion device, charges the electric power from the feeder line via the second DC power conversion device, and discharges the electric power to the feeder line via the second DC power conversion device. The electric power transformation system is further characterized in that the first DC power conversion device is controlled so that output is a rated capacity or less, and control is performed such that a deficiency in electric power in the second DC power conversion device is compensated through the discharge from the electric power storage device.
Inventors:
MIYAUCHI TSUTOMU (JP)
SUZUKI MOTONARI (JP)
TAKAHASHI HIROTAKA (JP)
TESHIMA MASATO (JP)
SUZUKI MOTONARI (JP)
TAKAHASHI HIROTAKA (JP)
TESHIMA MASATO (JP)
Application Number:
PCT/JP2021/046524
Publication Date:
July 21, 2022
Filing Date:
December 16, 2021
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
H02J7/00; B60M3/06; H02J7/34
Foreign References:
| JP2012171415A | 2012-09-10 | |||
| JP2016032950A | 2016-03-10 | |||
| JP2015030406A | 2015-02-16 |
Attorney, Agent or Firm:
POLAIRE I.P.C. (JP)
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