{
  "$type": "site.standard.document",
  "coverImage": {
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  "description": "This application discloses a box-type substation, an energy storage power supply system, and a photovoltaic power generation system. The box-type substation includes a low-voltage cabinet, a high-voltage cabinet, a transformer, a first keychain, and a second keychain. When two circuit breakers in…",
  "path": "/patents/1386859",
  "publishedAt": "2026-04-22T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "H02B1/24",
    "HUAWEI DIGITAL POWER TECH CO LTD [CN]"
  ],
  "textContent": "This application discloses a box-type substation, an energy storage power supply system, and a photovoltaic power generation system. The box-type substation includes a low-voltage cabinet, a high-voltage cabinet, a transformer, a first keychain, and a second keychain. When two circuit breakers in the low-voltage cabinet are in a switched-on state, each of the first keychain and the second keychain is locked at a corresponding circuit breaker. Therefore, when maintenance is performed on the transformer, the circuit breakers in the low-voltage cabinet are switched off first to remove the first keychain and the second keychain. Then, the first keychain and the second keychain are used together to switch off a disconnector in the high-voltage cabinet, and the first keychain and the second keychain are locked at the disconnector when the disconnector is in a switched-off state. Mechanical lock logic of the box-type substation is simple, and maintenance personnel can quickly switch off the circuit breakers and the disconnector. This can improve maintenance efficiency of the transformer while ensuring safety of the maintenance personnel, and improve running reliability of an energy storage system and a photovoltaic power generation system for which the box-type substation is used.",
  "title": "BOX-TYPE SUBSTATION, ENERGY STORAGE POWER SUPPLY SYSTEM, AND PHOTOVOLTAIC POWER GENERATION SYSTEM"
}