{
  "$type": "site.standard.document",
  "description": "It is an object to provide a wind turbine able to generate power irrespective of a presence of and a state of a power grid. To achieve the above object, a wind power generation system is provided with a wind turbine, the wind turbine including a blade 5 that rotates in response to the wind, a…",
  "path": "/patents/977859",
  "publishedAt": "2014-03-05T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "F03D1/02",
    "HITACHI LTD [JP]"
  ],
  "textContent": "It is an object to provide a wind turbine able to generate power irrespective of a presence of and a state of a power grid. To achieve the above object, a wind power generation system is provided with a wind turbine, the wind turbine including a blade 5 that rotates in response to the wind, a generator 7 that rotates with rotation of the blade 5 to generate power, and an auxiliary machine that controls a pitch angle of the blade 5. The auxiliary machine is driven by the generated power of a downwind type wind turbine to which a permanent magnet type generator 12 is mounted and which generates power in a state in which a blade 10 of the downwind type wind turbine rotating in response to the wind faces downwind.",
  "title": "WIND POWER GENERATION SYSTEM, DEVICE USING WIND POWER GENERATION SYSTEM, AND METHOD FOR OPERATING SAME"
}