{
  "$type": "site.standard.document",
  "description": "A method for controlling an output voltage of at least one transformer in a power grid. The comprises providing the least one transformers with a power electronics converter and an output voltage controller, determining a grid frequency, comparing the grid frequency with a reference value…",
  "path": "/patents/1361168",
  "publishedAt": "2024-03-21T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "H02J3/001",
    "HITACHI ENERGY LTD"
  ],
  "textContent": "A method for controlling an output voltage of at least one transformer in a power grid. The comprises providing the least one transformers with a power electronics converter and an output voltage controller, determining a grid frequency, comparing the grid frequency with a reference value, producing an error signal, applying the error signal as feedback to the controller, and generating a control action to cause the controller to change the output voltage of the transformer comprising a power electronics converter. The power electronics converter is an AC-AC converter, and the method comprises connecting the AC-AC converter to either a primary side or a secondary side of the transformer. The AC-AC converter has a first AC side and a second AC side and the method comprises connecting two terminals on the first AC side in-parallel to a winding of the transformer, and connecting the second AC side to an external circuit line.",
  "title": "CONTROL METHOD, COMPUTER PROGRAM PRODUCT, CONTROL SYSTEM & USE"
}