Power supply regulation system for a railway

• US 5,346,163 A
• Filed: 07/15/1992
• Issued: 09/13/1994
• Est. Priority Date: 07/19/1991
• Status: Expired due to Fees

• Current Assignee: Hitachi, Ltd.
• Original Assignee: Hitachi, Ltd.
• Inventors: Ikeda, Masahito, Momma, Naoko, Tashiro, Korefumi
• Primary Examiner(s): Bucci, David A.
• Assistant Examiner(s): LOWE, SCOTT
• Application Number:
  US07/913,361
• Time in Patent Office: 790 Days
• Field of Search: 104/298, 104/300, 104/301, 307/29, 307/31, 307/35, 307/140, 307/141, 191/2, 246/3, 246/4, 246/5, 246/187 R, 246/187 A, 246/187 B, 246/182 R
• US Class Current: 246/5
• CPC Class Codes: B60M 3/00 Feeding power to supply lines in contact with collector on vehicles; Arrangements for consuming regenerative power controlling rail vehicles by varying voltage of power fed to vehicle B60L; power distribution in general H02J

Abstract

A railway control system for controllably suppressing the maximum output of a railway substation for energy saving in a densified operation territory and, in which a predetermined upper limit value is established in the output of a substation. The output of the substation is always monitored by output monitoring apparatus, and, when the substation output exceeds an upper limit value, control command apparatus transmits a control command signal to any or several of output control apparatus, a train group and an operation administration system. The output control apparatus, train group or operation administration system which receives this signal performs output control or drive force control or both of them, thereby to limit the output of the substation at or below a predetermined value. It thus becomes possible to restrain a temporary output peak of a railway substation and to reduce the installed capacity. Further, with drive force regulation among a train group, an operation method having little overcapacity by gradual acceleration and deceleration is applied to each train, thus realizing energy saving along the entire route.

Claims

1. A power supply system for a railway, comprising:

at least one power substation for supplying electric power to a power receiving territory of a railway line, said substation having a function of restraining supply of electric power exceeding a predetermined amount of electric power;

electric power detection means for detecting when electric power supplied from said substation exceeds said predetermined amount of electric power;

voltage detection means for detecting the voltages of electric power received at each of a plurality of electric cars operated in said power receiving territory in response to a detection that electric power supplied from said substation exceeds said predetermined amount of electric power; and

drive force reduction means for selecting at least one of said electric cars to reduce drive force of the selected electric car to reduce drive force of the selected electric car in response to a detection that the voltage of the electric power received at said selected car has fallen below a predetermined voltage.

2. A power supply system according to claim 1, wherein said drive force reduction means includes means for sequentially selecting, as the selected electric car, electric cars which are less time delayed in running in said power receiving territory relative to a preset time schedule.