Elektr iste’molchilarining ulanishi natijasida turli qarshilikka ega elektr uzatish liniyalarida kuchlanish og‘ishining vujudga kelishi energiya tizimining muhim elementlaridan biri bo‘lgan kuch transformatorlarining ishlash ishonchliligi va xizmat ko‘rsatish muddati kamayishi, ishdan chiqish ehtimolligi va transformator magnit o‘zagida gisterezis toklari ortishi bilan cho‘lg‘amda qo‘shimcha qizish holatlarining paydo bo‘lishi hamda qo‘shimcha aktiv quvvat isrofiga sabab bo‘ladi. Ushbu holatlar kelib chiqishining oldini olish va elektr uzatish liniyasidagi kuchlanish og‘ishi natijasida kuch transformatorida hosil bo‘ladigan shikastlanishlarni kamaytirish hamda kuch transformatorida quvvat isrofini minimallashtirish bugungi kunda dolzarb masalalardan biri hisoblanadi. Mazkur tadqiqot ishining maqsadi kuchlanish og‘ishi natijasida kuch transformatorlarida hosil bo‘layotgan qo‘shimcha quvvat isrofini aniqlashdir. Tadqiqot predmeti sifatida ekspluatatsiya holatida bo‘lgan moyli kuch transformatorining magnit o‘zagi va cho‘lg‘amlari tanlab olindi. Ulanish sxemasi Δ/⅄0 -11 bo‘lgan TM-100/10/0,4-У3 moyli kuch transformatorida o‘tkazilgan eksperiment tadqiqotlar asosida uning yuqori va quyi qisqichlarida kuchlanish og‘ishi mavjud bo‘lishi uning aktiv qismlarida qo‘shimcha quvvat isrofiga olib kelishi yaratilgan dasturiy ta’minot yordamida hisoblab chiqildi. Bundan tashqari, har xil yuklama rejimida ishlayotgan ushbu kuch transformatorida quvvat isrofi uning yuklanish koeffitsiyentiga bog‘liq ekanligi aniqlandi.
Elektr iste’molchilarining ulanishi natijasida turli qarshilikka ega elektr uzatish liniyalarida kuchlanish og‘ishining vujudga kelishi energiya tizimining muhim elementlaridan biri bo‘lgan kuch transformatorlarining ishlash ishonchliligi va xizmat ko‘rsatish muddati kamayishi, ishdan chiqish ehtimolligi va transformator magnit o‘zagida gisterezis toklari ortishi bilan cho‘lg‘amda qo‘shimcha qizish holatlarining paydo bo‘lishi hamda qo‘shimcha aktiv quvvat isrofiga sabab bo‘ladi. Ushbu holatlar kelib chiqishining oldini olish va elektr uzatish liniyasidagi kuchlanish og‘ishi natijasida kuch transformatorida hosil bo‘ladigan shikastlanishlarni kamaytirish hamda kuch transformatorida quvvat isrofini minimallashtirish bugungi kunda dolzarb masalalardan biri hisoblanadi. Mazkur tadqiqot ishining maqsadi kuchlanish og‘ishi natijasida kuch transformatorlarida hosil bo‘layotgan qo‘shimcha quvvat isrofini aniqlashdir. Tadqiqot predmeti sifatida ekspluatatsiya holatida bo‘lgan moyli kuch transformatorining magnit o‘zagi va cho‘lg‘amlari tanlab olindi. Ulanish sxemasi Δ/⅄0 -11 bo‘lgan TM-100/10/0,4-У3 moyli kuch transformatorida o‘tkazilgan eksperiment tadqiqotlar asosida uning yuqori va quyi qisqichlarida kuchlanish og‘ishi mavjud bo‘lishi uning aktiv qismlarida qo‘shimcha quvvat isrofiga olib kelishi yaratilgan dasturiy ta’minot yordamida hisoblab chiqildi. Bundan tashqari, har xil yuklama rejimida ishlayotgan ushbu kuch transformatorida quvvat isrofi uning yuklanish koeffitsiyentiga bog‘liq ekanligi aniqlandi.
В результате присоединения электропотребителей возникают отклонения напряжения в линиях электропередачи с разным сопротивлением, являющихся одним из важных элементов энергосистемы, что снижает эксплуатационную надёжность и срок службы силовых трансформаторов, увеличивает вероятность выхода их из строя, а повышение токов гистерезиса в магнитопроводе трансформатора вызывает появление дополнительных условий нагрева и дополнительных потерь активной мощности. Предотвращение возникновения подобных ситуаций и снижение повреждений силового трансформатора в результате отклонения напряжения в линии электропередачи и минимизация потерь мощности в силовом трансформаторе являются сегодня одной из актуальных задач. Целью данного исследования является определение дополнительных потерь мощности, возникающих в силовых трансформаторах в результате отклонения напряжения. В качестве объекта исследования были выбраны магнитопровод и катушки эксплуатируемого масляного силового трансформатора. На основании экспериментальных исследований, проведённых на масляном силовом трансформаторе ТМ-100/10/0,4-У3 со схемой подключения Δ/⅄0 -11, с помощью созданного программного обеспечения рассчитано, что наличие отклонений напряжения в его верхнем и нижнем зажимах приводит к дополнительным потерям рассеиваемой мощности в его активных частях. Кроме того, установлено, что рассеиваемая мощность в данном силовом трансформаторе, работающем в различных режимах нагрузки, зависит от коэффициента загрузки.
Connecting of electrical devices with different resistances leads to voltage deviation in power transmission lines, which is considered as one of the important elements of a supply power system. Increase in voltage deviation may cause tank heating and excessive loss of active power. Preventing of these situations and reducing the damage to power transformers as a result of voltage deviations in the power transmission lines as well as minimizing the power loss in the power transformer systems are regarded as one of the relevant tasks nowadays. The purpose of this study is to determine additional power loss that occurs in power transformers as a result of voltage deviations. The magnetic core and coils of an oil power transformer in operation were selected as a subject of the research. An experiment carried out on the TM-100/10/0.4-U3 oil power transformer with a connection scheme D/⅄0 -11, with voltage deviation in its upper and lower clamps as an additional factor in its active parts, enabled calculating the power dissipation, using the developed software. Moreover, it was found that the power dissipation in this power transformer, operating in different load modes, depends on its load factor.
№ | Муаллифнинг исми | Лавозими | Ташкилот номи |
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1 | Qobilov M.H. | Energetika fakulteti tayanch doktoranti | Farg‘ona politexnika instituti |
2 | Toychiyev Z.Z. | texnika fanlari bo‘yicha falsafa doktori (PhD), Ilmiy tadqiqotlar, innovatsiyalar va ilmiy pedagogik kadrlar tayyorlash sektori boshlig‘i | Toshkent davlat texnika universtiteti Qo‘qon filiali |
№ | Ҳавола номи |
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