Title:
STRAY CURRENT ESTIMATION SYSTEM, STRAY CURRENT ESTIMATION METHOD, AND STRAY CURRENT ESTIMATION PROGRAM
Document Type and Number:
WIPO Patent Application WO/2020/158527
Kind Code:
A1
Abstract:
One representative stray current estimation system of the present invention comprises: an earth model creation unit that receives input of resistance parameters relating to rails, structures surrounding the rails, and the earth and creates a resistor grid extended in at least the rail direction and the depth direction; an equivalent resistor creation unit that creates an equivalent resistor which is equivalent to the resistor grid; a train circuit calculation unit that calculates a circuit model including transformer station and train circuit elements and the equivalent resistor, and obtains a circuit analysis result, such as the current or voltage, in relation to the equivalent resistor; and a stray current calculation unit that calculates a circuit model in which the equivalent resistor circuit analysis result is applied to the resistor grid, and calculates current flowing inside the resistor grid as stray current.
Inventors:
KIMURA SHOTA (JP)
MIYAUCHI TSUTOMU (JP)
TAKAHASHI HIROTAKA (JP)
OGUMA KENJI (JP)
MIYAUCHI TSUTOMU (JP)
TAKAHASHI HIROTAKA (JP)
OGUMA KENJI (JP)
Application Number:
PCT/JP2020/002035
Publication Date:
August 06, 2020
Filing Date:
January 22, 2020
Export Citation:
Assignee:
HITACHI LTD (JP)
International Classes:
B60M1/00; B60M5/00; G01R31/50; G06F30/10; G06F30/33; G06F30/367
Foreign References:
| JP2008267930A | 2008-11-06 | |||
| CN101703147A | 2010-05-12 | |||
| JP2004283173A | 2004-10-14 | |||
| JPS6427471A | 1989-01-30 | |||
| JP2019124835A | 2019-07-25 |
Other References:
GUIFU DU, DONGLIANG ZHANG, GUOXIN LI, CHONGLIN WANG, JIANHUA LIU: "Evaluation of Rail Potential Based on Power Distribution in DC Traction Power Systems", ENERGIES, vol. 9, no. 9, 9 September 2016 (2016-09-09), pages 729
Attorney, Agent or Firm:
Patent Corporate Body Dai-ichi Kokusai Tokkyo Jimusho (JP)
Download PDF:
Previous Patent: INSTALLATION CONSTRUCTION METHOD FOR WALL PANELS
Next Patent: BURNER, COMBUSTOR COMPRISING SAME, AND GAS TURBINE
Next Patent: BURNER, COMBUSTOR COMPRISING SAME, AND GAS TURBINE