{
  "$type": "site.standard.document",
  "description": "An active power conversion apparatus (APCA) is configured to estimate the grid frequency estimation of an electric grid connected to the APCA. The APCA includes a controller configured to receive measurements of at least one phase current between the APCA, and the electric grid. The controller is…",
  "path": "/patents/1370730",
  "publishedAt": "2024-10-31T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "H02J3/50",
    "Huawei Digital Power Technologies Co., Ltd."
  ],
  "textContent": "An active power conversion apparatus (APCA) is configured to estimate the grid frequency estimation of an electric grid connected to the APCA. The APCA includes a controller configured to receive measurements of at least one phase current between the APCA, and the electric grid. The controller is further configured to convert the at least one phase current to at least one synchronous reference frame, and determine direct and quadrature current references to be used in the frequency estimation. The controller is further configured to determine the use of frequency estimation as a manipulated variable that forces to zero at least one of the average values of current error signals. The APCA provides frequency control services in the electric grid that is equipped with the energy storage resource.",
  "title": "ACTIVE POWER CONVERSION APPARATUS, SYSTEM, AND METHOD FOR USE IN ACTIVE POWER CONVERSION APPARATUS"
}