{
  "$type": "site.standard.document",
  "description": "A control method, device and a power converter control device for efficiently controlling energy by utilizing a step-up/step-down chopper (DC-to-DC converter) to control the amount of energy stored in an electrical power storage device installed in direct current feeder sections for economically…",
  "path": "/patents/1077117",
  "publishedAt": "2005-06-08T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "B60M3/00",
    "HITACHI LTD [JP]"
  ],
  "textContent": "A control method, device and a power converter control device for efficiently controlling energy by utilizing a step-up/step-down chopper (DC-to-DC converter) to control the amount of energy stored in an electrical power storage device installed in direct current feeder sections for economically storing electrical energy. Prior to absorbing electrical power during operation, the rise in voltage on the feeder cable from the regenerative railcar is predicted from the operating information on that railcar within a database, the electrical power that should be discharged from the electrical power storage device up until that predicted time is found, the power command W* for uniform discharging is calculated, and controlled discharge is performed using the chopper circuit. The invention improves the utilization rate of the electrical power storage device, and improves the electric railway energy efficiency by utilizing a small capacity electrical power storage device to allow lower cost equipment.",
  "title": "Railway regenerative power absorption control method, device thereof and power converter control device"
}