{
  "$type": "site.standard.document",
  "description": "A power conversion device equipped with virtual synchronous generator control includes a converter to convert a first DC voltage output from a distributed power source into a second DC voltage, an inverter to convert the second DC voltage output from the converter into an AC voltage and output the…",
  "path": "/patents/1359474",
  "publishedAt": "2024-02-15T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "H02M1/12",
    "Mitsubishi Electric Corporation"
  ],
  "textContent": "A power conversion device equipped with virtual synchronous generator control includes a converter to convert a first DC voltage output from a distributed power source into a second DC voltage, an inverter to convert the second DC voltage output from the converter into an AC voltage and output the AC voltage to an AC system, a converter control circuit, a virtual synchronous generator control circuit to impart a transient characteristic of a synchronous generator to the inverter, and an inverter control circuit to control the inverter as a voltage source, based on AC system voltage information input from the virtual synchronous generator control circuit. The virtual synchronous generator control circuit calculates a switching frequency at which charge/discharge of the distributed power source is switched, based on information necessary for virtual synchronous generator control including a power target value of the power conversion device. The converter control circuit uses the switching frequency to create a frequency range of AC system voltage for providing a dead zone in which charge/discharge power of the distributed power source is zero in a drooping characteristic of the power conversion device, or a hysteresis in switching of charge/discharge of the distributed power source. The converter control circuit performs control such that charge/discharge power of the distributed power source becomes zero in the frequency range.",
  "title": "POWER CONVERSION DEVICE"
}