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ikki cho‘lg‘amli transformatorlar.

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out9.xml.rels ppt/slidelayouts/_rels/slidelayout10.xml.rels ppt/slidelayouts/_rels/slidelayout11.xml.rels ppt/slidelayouts/_rels/slidelayout4.xml.rels ppt/theme/theme1.xml ppt/media/image4.gif ppt/media/image10.gif ppt/ink/ink1.xml docprops/thumbnail.jpeg ppt/ink/ink2.xml ppt/presprops.xml ppt/tablestyles.xml ppt/viewprops.xml docprops/app.xml ppt/media/media1.mp4 docprops/core.xml ppt/media/image1.jpeg ppt/media/image11.png ppt/media/image12.png ppt/media/image13.png ppt/media/image14.png ppt/media/image15.png ppt/media/image16.png ppt/media/image2.png ppt/media/image3.png ppt/media/image5.png ppt/media/image6.png ppt/media/image7.png ppt/media/image8.png ppt/media/image9.png ppt/slides/_rels/slide3.xml.rels [content_types].xml _rels/.rels docprops/custom.xml induktiv qarshilik . x t qisqa tutashuv tajribasidan uq /%/ topiladi . qisqa tutashuv holatida . oqayotgan tokdan hosil bo‘lgan aktiv va induktiv qarshiliklardagi kuchlanishni pasayishi u a /%/ va u r /%/ quyidagicha ifodalanadi . 𝑢 𝑎 =100 3 𝑅 𝑇 𝐼 𝑛 𝑈 𝑛 =100 ∆ 𝑃 𝑄 . 𝑇 𝑆 𝑁 𝑢 𝑟 =100 3 𝑋 𝑇 𝐼 𝑛 𝑈 𝑛 qisqa tutashuv uchburchagidan 𝑢 𝑟 = 𝑢 𝑘 2 − 𝑈 𝑎 2 transformatorlar uchun to‘liq « t» ko‘rinish almashtiruv sxemasi o‘ rn iga « g » ko‘rinishligini qo‘llash (1b-rasm) hisobla rn i soddalashtiradi . bunda salt ishlash toki transformato rn ing birlamchi chulg‘am tokining qiymati va fazasiga ta’siri juda kichik bo …
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aytda transformatorning aktiv va reaktiv qarshiliklaridagi kuchlanishning pasayishiga teng . ikki chulg‘am transformatorlarning eng aniq almashtiruv sxemasi 1a-rasmda keltirilgan , bu « t» ko‘rinishli sxema . bunda bir faza ekvivalenti uchun birlamchi chulg‘amni qarshiliklari 𝑅 𝑡 1 va 𝑋 𝑡 1 ikkilamchi chulg‘amniki 𝑅 𝑡 2 , 𝑋 𝑡 2 va 𝐺 𝑡 , 𝑉 𝑡 aktiv , reaktiv o‘tkazuvchanliklardir . qisqa tutashuvdagi quvvat isrofi ∆ 𝑷 𝑸𝑻 ( qisqa tutashuv tajribadan aniqlanadi ) deb tok nominalga teng bo‘lganda transformator chulg‘amlaridagi uni qizdirishga sarf bo‘lgan aktiv qu vv at isrofi aytiladi . salt ishlashdagi qu vv at isrofi ∆ 𝑷 𝒔 . 𝒊𝒔𝒉 (salt ishlash tajribadan aniqlanadi ) deb nominal kuchlanish transformator po‘latini magnitlanish va uyurma toklari tufayli uni qizdirishga sarf bo‘lgan qu vv at isrofi aytiladi . salt ishlash toki 𝑰 𝒔 . 𝒊𝒔𝒉 % deb. nominal kuchlanishga ulangan biror chulg‘am toki (salt ishlash tajribasi ) boshqa chulg‘amlar ochiq …
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an bir kuchlanishga keltirib amalga oshiriladi . bunda qu vv at o‘zgarmas bo‘lib , magnit aloqalar shartli ravishda elektr aloqalar bilan almashtiriladi ( qu vv at keltirilmaydi ). parametrlar qaysi kuchlanishga keltirilmasin yuqori kuchlanish ( 𝑈 𝑦𝑢 o‘rta kuchlanish ( 𝑈 𝑜 ′ ), yoki transformatorning past kuchlanish 𝑈 𝑝 ) chulg‘amlarigami , uning farqi yo‘q . ko‘pincha , keltirilish yuqori kuchlanish 𝑈 𝑦𝑢 da amalga oshiriladi . elektr energiya uzatishni hisoblashda quvvat va kuchlanish liniyalarning oxirida berilmay , elektr stansiyalarining generatorlarida , ta’minlovchi podstansiyalarning yuqori kuchlanish shinalarida yoki pasaytiruvchi podstansiyalarning past va o‘rta kuchlanish shinalarida ham beriladi . hisoblanayotgan elektr energiya uzatish liniyaning ikkala tomoniga qo‘yilgan transformatorlar yoki qabul qiluvchi podstansiyaning transformatorlari kiradi . transformatorlar o‘zining qarshiliklari va o‘tkazuvchanliklariga ega , elektr uzatishning hisoblarida bu parametrlarni ham e’tiborga olish kerak : ularning qiymati transformatorning nominal qu vv atiga va chulg‘amlarining kuchlanishiga bog‘liq . 1-rasm. ikki chulg’amli transformatorning almashtiruv sxemasi …
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totransformatorlarda induktiv qarshilik aktiv qarshilikdan ko‘p marta kattadir. 𝑋 𝑇 ≫ 𝑅 𝑇 yuhr (yuklangan holda rostlanuvchi) transformatorlarning induktiv qarshiligi transformatorning asosiy shoxobchasidan boshqasiga o‘tkazilganda aktiv qarshilik r t ga nisbatan ancha ko‘p o‘zgaradi. bu holatni tarmoqlarga tegishli elektr hisoblarida e’tiborga olmaslik mumkin, ammo qisqa tutashuv (q.t) tokini hisoblashda nazarda tutish kerak. aktiv o’tkazuvchanlik g t . s alt ishla sh holatida aktiv quvvat isrofi ∆ 𝑃 𝑠 . 𝑦𝑢 = 𝑈 𝑁 2 ∙ 𝐺 𝑇 bo’lsa, unda aktiv o’tkazuvchanlik 𝐺 𝑇 = ∆ 𝑃 𝑠 . 𝑦𝑢 𝑈 𝑁 2 ∆ 𝑃 𝑠 . 𝑖𝑠h kw da, 𝑈 𝑁 − kv da bo’lsa, unda g t aniqlanadi 𝐺 𝑇 = ∆ 𝑃 𝑠 . 𝑦𝑢 10 3 ∙ 𝑈 𝑁 2 , 𝐶 𝑚 reaktiv o’tkazuvchanlik bo’lgani uchun salt yurish (i s.yu %) tokning hammasi o’tkazuvchanlik w orqali oqadi deb qabul qilish mumkin. unda transformatorning magnitlash quvvati (ikkinchi …

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