A cikin yankunan da kashi ga gaba da lalace, masu ɗaya ƙarfin kilowatt zai iya haɓaka tashin kasa a kan wani lokaci.

Jirgin Tashar Jirgin Kirkiyar Kashi: Tsarin Kirki Da Yanayi Da Kirki

A cikin "Tushen Bincike da Tashar Kirkiyar Jirgin" (Q/GDW 1738–2012), tsari na jirgin kirkiyar kashi da 10 kV yana da shiga da dalilai masu kyauwa a kan kirki a tafin jirgin. Idan, a kasar gida, ba zan iya kawo tsari zuwa mafi yawan 15 km ba. Amma, a wasu wurare, tsari ya kawo zuwa mafi yawan 50 km saboda tsarin magana mai nufin, ma'ana ta hankali da yanayin kashi da kuma tsarin magana mai nufin, wanda ya haɗa da jirgin kashi da 10 kV mai yawa. Wannan jirgin kashi mai yawa yana da muhimmanci wajen abubuwa mai girma da kuma yanayi mai yawa a kan kirki a tafin da kuma a kan gabas. An sauki da abubuwan da za su iya koyar da wannan matsalolin shine koyar da kirki a tafun.

Don samun kyauwa a kan kirki, an samun hanyoyin da ke koyar da kirki a kan jirgin da kuma jirgin da tsari mai nufin:

• Koyar da kirki a kan jirgin da ke fitaccen;

• Koyar da yanayin kashi a kan jirgin;

• Shirya parametara na jirgin;

• Gina jirgin da ke fitaccen;

• Sakamako da SVR-series feeder automatic voltage regulators.

Daga cikin waɗannan, waɗanda suka biyo na farko suna da muhimmanci wajen koyar da kirki a kan jirgin da ke fitaccen, amma babu suna da damar da kuma suna da karfi don koyar da kirki a kan jirgin da ke fitaccen. Rockwell Electric Co., Ltd. ta gina SVR Feeder Automatic Voltage Regulator, wanda yana ba da amsa daidai, mai karfi, da kuma ya danganta a kan koyar da kirki a kan jirgin da ke fitaccen.

Yanayin kashi da ke fitaccen yana da autotransformer da takwas, on-load tap changer (OLTC), da kuma kontroler da ke fitaccen wanda yake iya kula da kirki a kan gabas a kan jirgin daga baya ga yanayin magana. Autotransformer yana da takwas mai yawa da takwas mai koyar da kirki. Yanayin kirki daga takwas mai koyar da kirki ta 2.5%, wanda yake da muhimmanci wajen koyar da kirki a kan ±20% (i.e., 40% overall). Kuma, ana da takwas daidai da ke fitaccen da kuma delta-connected winding wanda yake da muhimmanci wajen koyar da harmonics da kuma sakamako da kontroler da OLTC mechanism.

A kan gabas, main connection yana iya canzawa da OLTC across taps 1 through 9. A kan gabas, main connection yana da shiga da koyar da kirki da ke fitaccen:

• Don koyar da kirki daga 0% zuwa +20%, main connection yana da shiga da tap 1 (tap 1 yana da shiga da direct-through position);

• Don koyar da kirki daga –5% zuwa +15%, yana da shiga da tap 3 (tap 3 yana da shiga da direct-through);

• Don koyar da kirki daga –10% zuwa +10%, yana da shiga da tap 5 (tap 5 yana da shiga da direct-through).

Current transformers (CTs) ana da shiga da phases A da C a kan gabas, wanda suka shiga da differential configuration internally. Voltage transformers (VTs) ana da shiga da phases A da C a kan gabas. A kan configurations da ke fitaccen, VTs ana da shiga da phases A da C a kan gabas.

Kontroler yana amfani da voltage da current signals daga gabas a kan analog inputs don koyar da kirki. Various status signals suka shiga da muhimmiyar dalilai don koyar da kirki. Based on the fundamental principle of “ensuring qualified voltage while minimizing tap operations,” and employing fuzzy control theory to blur the regulation boundaries, an enhanced control strategy has been implemented. This effectively improves voltage stability and significantly reduces the number of tap changes.

A kan Automatic Mode, kontroler yana koyar da tap position don koyar da kirki:

• Idan kirki a kan gabas yana da yawa da “reference voltage” da ake bayyana da ita, kontroler yana amfani da OLTC don koyar da kirki. Ba a yi waɗanda baya, ake kula da lockout period don koyar da kirki.

• Idan lockout interval yana kawo, za a iya koyar da tap change.

• Amma, idan kirki a kan gabas yana da yawa da reference voltage da ake bayyana da ita, kontroler yana amfani da step-down command, kuma ake kula da lockout period.

A kan Manual Mode, device yana iya da shiga da tap position da ake bayyana da ita. A kan Remote Mode, yana amfani da commands daga remote control center da kuma yana koyar da tap position da ake bayyana da ita.