{
  "$type": "site.standard.document",
  "description": "This application discloses an energy storage system, a power conversion system, and a method for optimizing primary frequency modulation. In the method, when the power conversion system determines that a SoC value of a target energy storage battery does not meet a target SoC value and determines…",
  "path": "/patents/1393563",
  "publishedAt": "2026-02-25T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "H02J3/00142",
    "HUAWEI DIGITAL POWER TECH CO LTD [CN]"
  ],
  "textContent": "This application discloses an energy storage system, a power conversion system, and a method for optimizing primary frequency modulation. In the method, when the power conversion system determines that a SoC value of a target energy storage battery does not meet a target SoC value and determines that a present frequency of a power grid falls within a frequency modulation constant band, the power conversion system may determine, based on a preset mapping relationship between a SoC value and an active power, a first specified active power value corresponding to the SoC value of the target energy storage battery, and control, based on the first specified active power value, the target energy storage battery to be charged or discharged, so that the SoC value that is of the target energy storage battery and that is monitored by the battery management system can reach the target SoC value. In this way, the energy storage battery can be effectively prevented from being fully charged or discharged, so that the energy storage system can continuously participate in a primary frequency modulation service. Therefore, a time period in which the energy storage system participates in the primary frequency modulation service is effectively prolonged, thereby improving a yield of the frequency modulation service.",
  "title": "ENERGY STORAGE SYSTEM, ENERGY STORAGE CONVERTER, AND OPTIMIZATION METHOD FOR PRIMARY FREQUENCY MODULATION"
}