Ruzivo Rwakazara rweTransformer Main Protection uye Backup Protection

Transformer ibasa rinoenderera mberi rekushandisa michina isingachinji, kushanda kwakavimbika, mikana mishoma yekukundikana. Asi nekuda kwekuti ma transformer mazhinji akaiswa panze, uye anokanganiswa nekushanda kwemutoro uye kukanganisa kwesystem yemagetsi, panguva yekushanda, pane mhando dzese dzezvikanganiso nemamiriro asina kujairika.

1. Zvikanganiso zvakajairika uye zvisina kujairika zvematransformer

2. Kugadziriswa kwekudzivirira kwetransformer

3. Dziviriro isiri yemagetsi

(1) Dziviriro yegesi

(2) Dziviriro yekumanikidzwa

(3) Dziviriro yekupisa uye huwandu hwemafuta

(4) Dziviriro inotonhorera zvachose

4. Dziviriro yakasiyana

(1) Magnetizing inrush current ye transformer

(2) Nheyo yekudzivirira kwechipiri kweharmonic

(3) Dziviriro yakasiyana-siyana yekukurumidza kupwanya

Taura izvi muchidimbu nezvekudzivirira kukuru kwetransformer, uye ramba uchitsanangura dziviriro yekuchengetedza yetransformer. Kune mhando dzakawanda dzekuchengetedza kuchengetedza dzematransformer. Heino sumo pfupi yemhando mbiri dzekuchengetedza kuchengetedza, dziviriro ye overcurrent uye dziviriro yegrounding yetransformer.

1. Dziviriro yemhepo yakawandisa ine kuvharirwa kwemhepo zvakare

2. Kudzivirira pasi kwetransformer

Dziviriro yekuchengetedza yezvikanganiso zvematransformer makuru nepakati pakuisa pasi (grounding) inowanzo sanganisira: dziviriro ye zero sequence overcurrent, dziviriro ye zero sequence overvoltage, dziviriro yemukana, nezvimwewo. Zvinotevera ipfupiso yakavakirwa panzira nhatu dzakasiyana dzekuisa pasi dze neutral point.

(1) Nzvimbo isina kwayakarerekera yakavakirwa zvakananga

(2) Nzvimbo isina kwayakarerekera haina hwaro

(3) Nzvimbo isina kwayakarerekera inosimbiswa kuburikidza nepakati pekubuda kwemvura

Matransformer ane voltage yakakwira zvakanyanya ese ari matransformer ane insulation yepakati, uye insulation yepasi ye neutral point coil haina kusimba kupfuura zvimwe zvikamu. Insulation ye neutral point inopwanyika nyore nyore. Saka, dziviriro yemukana inofanira kugadziriswa.

Basa rekudzivirira gap nderekuchengetedza kuchengetedzeka kwekudzivirira kwenzvimbo isina kuvharwa yenzvimbo isina kuvhurika yetransformer.

Kudzivirira gap kunowanikwa nekushandisa gap current 3I0 inoyerera nepakati pe neutral point ye transformer uye open delta voltage 3U0 ye busbar PT senzira yekuyera nayo.

Kana nzvimbo isina kusimba yekutadza ikakwira panzvimbo yacho, nzvimbo yacho inotyoka uye magetsi makuru e3I0 anogadzirwa. Panguva ino, dziviriro yenzvimbo inovhurwa uye transformer inochekwa mushure mekunonoka. Pamusoro pezvo, kana paine dambudziko repasi musystem, nzvimbo isina kusimba inomiswa uye dziviriro ye zero sequence yetransformer inomiswa, uye nzvimbo isina kusimba inomiswa kutanga. Mushure mekunge system yarasikirwa nenzvimbo yekumisa, kana dambudziko richiripo, open delta voltage 3U0 yebusbar PT ichave yakakura kwazvo, uye dziviriro yenzvimbo ichashandawo panguva ino.