Wani Inter Turn Fault Protection?

Inter Turn Fault Protection na nufin?

Ma'anar Inter Turn Fault

Inter turn faults ta faru idan kuma da shiga bayan dukkan hanyoyi a cikin yadda da aka saka a kan wanda mafi girma a kan stator.

Tsarin Samun Bayan Dukka

Ake iya samun waɗannan bayan dukka tare da tsarin stator differential protection ko stator earth fault protection.

Mahimmanci na Stator Inter Turn Protection

Majalisai mai gaba da kuma majalisai masu gaba na biyu sun buƙata don samun inter turn protection a stator don inganta bayan dukka.

Tsarin Cross Differential

Tsarin cross differential ce mafi yawan amfani a kan waɗannan. A wannan tsari, zuba ta hanyoyi har zuwa duwatsu masu hanyar biyu.

Har zuwa biyu ana fito da current transformers (CTs) masu shaida, kuma akwai kofin bincike a bayan ɗaya da ɗaya. Wannan kofin bincike ya faru saboda tunanin abubuwan karamin primary a CTs sun haɗa, ba kawai tare da transformer differential protection inda karamin karamin primary ya haɗa kadan da aka ɓace.

Ana kofin differential relay da series stabilizing resistor a kan CT secondary loop. Idan inter turn fault ya faru a kan hanyoyin biyu a stator, zai iya ɗaukan balancen a CT secondary circuits, wanda yake kawo karfi 87 differential relay. Tsarin cross differential protection ya kamata a yi a kan har zuwa.

Tsarin Protection Maimakon

Wannan tsari ta ba da al'amuran da ke jin bayan dukka na duka masu ma'adawa masu tsari ko tsarin kofin. Bayan dukka a kan stator winding ta haɗa karamin second harmonic current, wanda ya haɗa a field winding da kuma exciter circuits a kan generator. Karamin ya iya haɗa a sensitive polarized relay tare da CT da filter circuit.

Kiyasin tsari ta kontrola tare da negative phase sequence relay, don in kawo karfin da aka yi a lokacin bayan dukka na gaba ko asymmetrical load conditions. Idan akwai asymmetry a kan generator unit zone, negative phase sequence relay ta iya ba da damar kawo karfin, kuma yana ɗaukarsa masu main circuit breaker, don in inganta rotor damage saboda over rating effects of second harmonic currents.