{
  "$type": "site.standard.document",
  "description": "The present disclosure discloses a sub-module hybrid MMC with low full-bridge ratio and a DC fault processing method thereof. The hybrid MMC prevents the energy at the AC side from entering a DC system by artificially creating three-phase interphase short circuit at the AC side of a converter in…",
  "path": "/patents/1367054",
  "publishedAt": "2024-07-18T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "H02M1/32",
    "Zhejiang University"
  ],
  "textContent": "The present disclosure discloses a sub-module hybrid MMC with low full-bridge ratio and a DC fault processing method thereof. The hybrid MMC prevents the energy at the AC side from entering a DC system by artificially creating three-phase interphase short circuit at the AC side of a converter in the DC fault processing process, which greatly reduces the ratio of full-bridge sub-modules required for DC fault processing. Moreover, the hybrid MMC has the same DC fault processing speed as the sub-module hybrid MMC with high full-bridge. The duration of the artificially created three-phase interphase short circuit fault in the fault processing process does not exceed 30 ms, which will not have a great impact on the AC system. Compared with the existing sub-module hybrid MMC, the MMC of the present disclosure can also deal with DC faults under the condition of using fewer full-bridge sub-modules, which can reduce the number of required power electronic devices, greatly reduces the cost of building an overhead line high-voltage flexible DC transmission system, and has very strong reference significance and use value in engineering.",
  "title": "SUBMODULE HYBRID MMC WITH LOW FULL-BRIDGE RATIO AND DC FAULT PROCESSING METHOD THEREOF"
}