{
  "$type": "site.standard.document",
  "coverImage": {
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  "description": "This application provides a photovoltaic system and a circulating current suppression method. The system includes a controller and at least two inverters. A direct current input terminal of each inverter is connected to a corresponding photovoltaic array. Alternating current output terminals of the…",
  "path": "/patents/1397085",
  "publishedAt": "2025-08-27T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "H02J3/381",
    "HUAWEI DIGITAL POWER TECH CO LTD [CN]"
  ],
  "textContent": "This application provides a photovoltaic system and a circulating current suppression method. The system includes a controller and at least two inverters. A direct current input terminal of each inverter is connected to a corresponding photovoltaic array. Alternating current output terminals of the at least two inverters are connected in parallel. The controller is configured to: obtain a direct current component of a common-mode output current of at least one of the at least two inverters, and adjust a direct current bus voltage of the corresponding inverter based on a magnitude of the direct current component of the common-mode output current, to suppress a circulating current between the at least two inverters. In this technical solution, a circulating current between a plurality of inverters connected in parallel can be suppressed, thereby reducing loss caused by a circulating current, and improving power supply efficiency. In addition, leakage current mis-protection and overcurrent protection caused by a circulating current can also be avoided. An excessively large circulating current may further damage a power device in an inverter. Therefore, in this embodiment of this application, a power device can be protected from impact of a circulating current.",
  "title": "PHOTOVOLTAIC SYSTEM AND CIRCULATING CURRENT SUPPRESSION METHOD"
}