Power storage unit of DC electric railway

A technology for power storage and electrical rails, applied in electric braking systems, electric vehicles, power lines, etc., can solve the problems of inability to reduce the voltage of feeder cables, high equipment costs, and impracticality.
CN101282855BInactive Publication Date: 2010-08-18MEIDENSHA ELECTRIC MFG CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
MEIDENSHA ELECTRIC MFG CO LTD
Publication Date
2010-08-18
Estimated Expiration
Not applicable · inactive patent

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Abstract

To prevent invalidated regeneration of an electric vehicle and to protect an electric double layer capacitor against overvoltage without requiring a load resistor facility and without increasing the capacity of a capacitor in a power storage unit where electric power supply to a powering electric vehicle and absorption of regenerated power are performed by charging / discharging an electric double layer capacitor using a step up / down chopper. The electric vehicle (2) has a function for reducing a regeneration current from 100% to 0% at the pantograph point voltage of a specified level or above according to that voltage. The control section (4C) of a step up / down chopper (4B) performs invalidated regeneration prevention control for increasing the feeder voltage up to such a level as to actuate regeneration current reducing control function of the electric vehicle (2) when an electric double layer capacitor (4A) is charged up to an arbitrary voltage.
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Description

technical field

[0001] The present invention relates to an electric power storage unit of a direct current electric rail system that supplies electric power to electric cars and absorbs the regenerated electric power; more particularly, relates to preventing electric cars from regenerative failure when the electric power storage medium is charged to a level exceeding an arbitrary voltage storage unit. Background technique

[0002] Generally, not all of the regenerative power generated by the electric vehicle under regenerative braking is used to start and / or accelerate the vehicle, and thus, the unused regenerative power becomes redundant power. In order to obtain effective utilization of excess regenerative power, a system is proposed in which a power storage unit including a power storage medium and a DC / DC converter is provided in parallel with the feeder cable so that the excess regenerative power is absorbed by the power storage medium absorb.

[0003] One disadvantag...

Claims

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