Providing A New Characteristic for OvercurrentRelays

This with the integration of distributed generation(DG) to meshed distribution systems, the operating time of theprotective system becomes a major concern in order to avoidnuisance DG tripping. This paper proposes a new trippingcharacteristic for directional overcurrent relays (DOCRs) thatcan achieve a higher possible reduction of overall relaysoperating time in meshed distribution networks tripping. Theproposed tripping characteristic is described in detail. Theproposed characteristic is tested on the distribution system is apart of a distribution network, owned by HimmerlandsElforsyning, in Aalborg, Denmark. Also, in this paper usinghybrid algorithm GA and LP for solve relay coordinationproblem. Also, in this paper fault considered is kind of threephase fault. in this paper The result shown that proposecharacteristic are better than standard IEC characteristic.

کلیدواژه ها:

overcurrent relay ، hybrid algorithm ، relaycharacteristic.