{
  "$type": "site.standard.document",
  "description": "The present disclosure provides a zero-sequence parameter measurement and ground voltage control method for a resonant ground system based on a virtual ground principle. The method, based on the virtual ground principle, arbitrarily specifies a point K in a phasor plane in which three-phase…",
  "path": "/patents/1261845",
  "publishedAt": "2020-05-14T00:00:00.000Z",
  "site": "at://did:plc:oql6ds5vnff4ugar6rruliwd/site.standard.publication/3mn3ohu7oxx5w",
  "tags": [
    "G01R31/52",
    "HANGZHOU QIUCHUANG ELECTRIC POWER SCIENCE&TECHNOLOGY CO., LTD."
  ],
  "textContent": "The present disclosure provides a zero-sequence parameter measurement and ground voltage control method for a resonant ground system based on a virtual ground principle. The method, based on the virtual ground principle, arbitrarily specifies a point K in a phasor plane in which three-phase voltages are located. A virtual ground control method is used to achieve virtual ground of the point K, and an accurate zero-sequence resonant parameter of a zero-sequence network under an action of the excitation {dot over (U)}can be obtained. When a single-phase ground fault occurs, a ground phase is specified as a target working point, and a control method is applied to cause the zero-sequence network to accurately resonate, and a voltage of this phase relative to ground is 0. At this time, both a residual voltage and a residual current of the fault phase are effectively suppressed.",
  "title": "ZERO-SEQUENCE PARAMETER MEASUREMENT AND GROUND VOLTAGE CONTROL METHOD FOR RESONANT GROUND SYSTEM BASED ON VIRTUAL GROUND PRINCIPLE"
}