Kukaici a cikin GIS (Gas Insulated Switchgear) Da Zero Flux Current Transformers
Ingantaccen karamin karamin jirgin saman, musamman da amfani da abubuwa masu aiki a cikin tashar jirgi, yana bukata hanyoyi na iya rarrabawa. Wadannan suna da muhimmanci wajen tabbatar da mutane mai sauƙi a kan mutane mai sauƙi a kan adadin ruwa mai karfi. A cikin ƙarin bayyana na amsa da amsar da amsa, ana amfani da mafi girma a cikin tashar jirgi.
Kasafin tashar jirgi yana da alaka zai zuwa aiki a kan gurbin da ke. Wannan alaka ta zama tushen bayanin yaɗa da za su iya haɓaka wannan mafi girma. Wanda daga cikinsu yana da shi shine yanayin zero-flux. A cikin wannan yanayin, an yi amfani da tashar jirgi mai tsari don haɓaka mafi girma a kan gurbin da ke.
Tashar jirgi na zero-flux suna cikin kungiyar Low-Power Instrument Transformers (LPITs). LPITs suna da dalilai masu ma'ana, musamman ingantacce, kadan adadin ruwa, kyakkyawan kayan aiki, nau'in amincewa, da saukin siffar. Daga baya da amfani da takardun takarda a cikin IEE-Business tun daga baya da amfani da LPITs a cikin Gas-Insulated Substations (GIS) zai zama mafi yawan amfani.
Wuri mai amfani da tashar jirgi yana da aiki a kan haɗa mafi girma a kan gurbin. Sistem mai kontrol mai kusa, wanda anke da amfani da tashar jirgi mai tsari da kuma tashar jirgi mai bayanin, an yi amfani da shi don haɓaka tashar jirgi mai tsari. Tashar jirgi mai tsari an yi amfani da shi don haɓaka mafi girma da ke a kan tashar jirgi mai yawa, saboda haka an yi "Zero-flux CT".
Tashar jirgi mai tsari an yi amfani da shi don haɓaka mafi girma, an yi amfani da shi don haɓaka mafi girma da ke a kan tashar jirgi mai yawa. A cikin wannan yanayin, material mai mafi girma ba a ci gurbin ba, saboda haka ba za a ci hysteresis ko saturation effects. Amma, a cikin yanayin DC ko yanayin da suka fiye, yanayin da take haɓaka mafi girma ba zama da amsa. Tashar jirgi mai bayanin ba zan iya ƙarin bayyana mafi girma da ke, kuma ba za a iya haɓaka mafi girma da shi a cikin wannan yanayin.
Don ƙarin bayyana a cikin yanayin DC, an yi amfani da sensor mai mafi girma. Wannan zai iya zama Hall probe wanda ake amfani a cikin gurbin ko kuma flux-gate circuit wanda ake amfani da tashar jirgi mai tsari da kuma tashar jirgi mai bayanin. Dalilai masu ma'ana na Zero-flux Current TransformersSensors na AC zero-flux suna da nau'in linearity da precision. Ba suka ci gurbin mai mafi girma, saboda haka suka da phase error mai tsari. Nau'in waɗannan sensors zai zama da precision da ke a kan tashar jirgi mai tsari.
An yi amfani da Hall probe ko kuma flux-gate detector don ƙarin bayyana tashar jirgi mai DC. Waɗannan sensors suna da resistance mai yawa a cikin electromagnetic interference, saboda haka suke da amincewa a cikin yankunan da suka fi electromagnetic. Mawagalar Zero-flux Current TransformersSensor yana bukata tashar jirgi mai tsari da kuma amplifier don ƙara aiki. Idan tashar jirgi mai tsari ba a yi aiki, yana iya ƙara tashar jirgi mai amincewa, wanda yake iya ƙara amincewa.
Misalai na Amfani da Zero-flux Current Transformer a Cikin Kii-Channel Project HVDC Link for Outdoor 500 kV DC GISA cikin Kii-Channel project, an yi amfani da tashar jirgi na zero-flux. Figura 2 ta bayyana diagram mai kusa da tufafi na hardware na tashar jirgi. Tashar jirgi da za su iya ƙara ƙarin bayyana, (Ip), yana ƙara mafi girma wanda yake iya ƙara tashar jirgi mai tsari (Is) a cikin tashar jirgi mai tsari ((Ns)).An yi amfani da uku cores mai tsari, wanda suke cikin compartment na GIS, don ƙara ƙarin bayyana mafi girma. Cores (N1) da (N2) suna da aiki a kan ƙarin bayyana yanayin DC na mafi girma, saboda haka (N3) yana da aiki a kan ƙarin bayyana yanayin AC. Oscillator an yi amfani da shi don ƙara cores mai ƙarin bayyana DC ((N1) da (N2)) a cikin yanayin saturation a cikin ƙarshe.
Idan mafi girma na DC da ke zero, tashar jirgi mai tsari a cikin ƙarshe zai zama daidai. Amma, idan mafi girma na DC da ke zero, farkon da ke a cikin tashar jirgi mai tsari zai zama daidai a cikin mafi girma na DC da ke. Don ƙarin bayyana yanayin AC da ke a cikin (N3), an yi amfani da control loop. Loop an yi amfani da shi don ƙara tashar jirgi mai tsari (Is) a cikin ƙarshe. Power amplifier an yi amfani da shi don ƙara tashar jirgi (Is) a cikin tashar jirgi mai tsari (Ns). Saboda haka, tashar jirgi mai tsari an yi amfani da shi don ƙara tashar jirgi mai tsari, wanda yake iya ƙara tashar jirgi mai tsari. Precision na ƙarin bayyana zai zama da burden resistor da kuma stability na differential amplifier.
Tashar jirgi na zero-flux suna da nau'in instruments mai precision don ƙarin bayyana a cikin yanayin AC da AC/DC. Yanzu, suke da amfani da shi a cikin High-Voltage Direct Current (HVDC) Gas-Insulated Substations (GIS). Principle na ƙarin bayyana na tashar jirgi na AC zero-flux an bayyana a cikin Figura 1.
