| 摘要 |
PURPOSE:To check a ground leakage current as well as to prevent an underground metallic pipe from electrolytic corrosion and ground magnetic disturbance in an economic manner, by installing a negative feeder line in the point midway in a feeder section from a DC substation in parallel with rails, while inserting a controllable power source into this feeder line in series. CONSTITUTION:Supposing that electric rolling stock 1 feeds a load current from a rectifier 7 at a P point within a A-B section of a feeder circuit, in order to make the rail potential of a substation point A equal to that of a connection point B of a negative feeder line for rails 2, it should be equalized to distribution of the rail potential at a time when a substation is installed in the B point. It means that a electrolytic corrosion preventive effect in time of shortening a substation interval or the same effect of grounds magnetic disturbance prevention is obtainable. A controller 9 receives train information TI on an electric car position and a load current or the like from the electric rolling stock 1, through which operation for the said condition takes place, and a current power supply 8 is controlled. |
