Method for positioning single-phase grounding failure of distribution network containing distributed power supply

Method for positioning single-phase grounding failure of distribution network containing distributed power supply

  • CN 102,253,307 A
  • Filed: 04/19/2011
  • Published: 11/23/2011
  • Est. Priority Date: 04/19/2011
  • Status: Active Application
First Claim
Patent Images

1. an one-phase earthing failure in electric distribution network localization method that contains distributed power source is characterized in that described method comprises the steps:

  • (1). power distribution network is carried out section divide;

    (2). single-phase potential transformer is installed at transformer station low-pressure side bus place;

    At each feeder line top zero sequence current mutual inductor, zero sequential potential transformer and monitor are installed;

    Zero sequence current mutual inductor and monitor are installed by two end points places at totally-enclosed section;

    (3). measure the single-phase voltage-to-ground value of transformer station'"'"'s low-pressure side bus, judge that according to voltage swing whether power distribution network this moment permanent earth fault takes place, if take place, then goes to step (4);

    (4). operation troubles location master routine, carry out localization of fault.

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