{
  "$type": "site.standard.document",
  "description": "A method for operating a power supply system connected to a grid and including a rotor (106), a DFIG (118), a power conversion assembly (210), and an active filter (270) is disclosed. The DFIG (118) includes a generator rotor (122) mechanically connected with the rotor (106) and a generator stator…",
  "path": "/patents/1391446",
  "publishedAt": "2025-11-19T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F03D9/255",
    "GENERAL ELECTRIC RENOVABLES ESPANA SL [ES]"
  ],
  "textContent": "A method for operating a power supply system connected to a grid and including a rotor (106), a DFIG (118), a power conversion assembly (210), and an active filter (270) is disclosed. The DFIG (118) includes a generator rotor (122) mechanically connected with the rotor (106) and a generator stator (120). The power conversion assembly (210) includes a rotor-side power converter (220). The active filter (270) is electrically connected with the generator stator (120) via a stator bus (208). The rotor-side power converter (220) is electrically connected with the generator rotor (122) via a rotor bus (212). The method includes: determining (1100, 2100, 3100), based on a rotor frequency (fr) of the generator rotor (122), an expected harmonic frequency ({fh}) for a stator current (Is) flowing on the stator bus (208); determining (1200, 2200, 3200), in a data set comprising stator current values ({Is}), a current amplitude ({Ih}) of the stator current (Is) at the expected harmonic frequency ({fh}); and controlling (1300, 2300, 3300), based on the current amplitude ({Ih}) of the stator current (Is) at the expected harmonic frequency ({fh}), the active filter (270).",
  "title": "A METHOD FOR OPERATING A POWER SUPPLY SYSTEM AND A POWER SUPPLY SYSTEM"
}