The article considers the results of the analysis of autotransformers operation mode
monitoring. The time diagram of active load current and oil temperature of autotransformer
TashTES AT-3 is established and during one year changes of these variables and basic
parameters of autotransformer were observed. Technical faults of the power transformer and
high power autotransformer are established and methods of their elimination are determined.
Damage of transformers and autotransformers with voltage of 110-500 kV of about 30% of the
total number of outages which were accompanied by internal short-circuits and two main causes
of damage were determined. The main causes of technological failures, which were not
accompanied by internal short-circuits, are as follows: 20% of failures in operation of the onload tap-changer, 16% of oil leaks from the bushings, 13% of oil leaks and lowering of oil from
the transformer due to violation of welded joints and rubber seals, 4% of engine damage to oil
pumps of the cooling system, 3% of pressure increase in high-voltage hermetic bushings, 2% of
film protection shell damage. The main reasons of technological violations accompanied by
internal short-circuit in the transformer are as follows: breakdown of internal insulation of highvoltage bushings, insufficient short-circuit resistance, wear and tear of winding insulation,
breakdown of insulation
Maqolada avtotransformatorning ish rejimlari tahliliy monitoringi yuritilgan. Bu monitoring
asosida TashIESdagi AT-3 avtotransformatorining toki, aktiv yuklamasi va moyi
temperaturasining vaqtga bog’liqlik grafigi qurilgan hamda bir yil davomida bu kattaliklarning
o'zgarishlari kuzatilgan va AT-3 avtotransformatorining asosiy parametrlari ham
hisoblangan.Undan tashqari katta quvvatli transformator va avtotransformatorning tehnik
nosozliklari hamda uni bartaraf qilish usullari, nominal kattaliklari jadval asosida tuzilgan va
shikastlanish tahlillari keltirilgan. 110-500 kV kuchlanishli transformator va
avtotransformatorda ichki qisqa tutashuvlarning kelib chiqish sabablari hamda keltiriladigan
zararning tahminan 30% ini tashkil qilganligi aniqlangan. quyidagi ko'rib chiqilgan avariya
holatlari uchun: RPN ning ish davomida buzilishi 20% ni, chiqishlardan moyning oqib ketishi
16% ni, transformatorning payvandlangan qismlari va zichlovchi rezinalaridan moyning oib
ketishi va qo'yib yuborishi 13% ni, moy nasolari va sovutish tizimidagi motorlarning ishdan
chiqishi 4% ni, germetik chiqishlaridagi simning ko'payib ketishidan 3% ni tashkil etadi.
Transformatordagi asosiy qisqa tutashuv sabablari quyidagilarga ko'ra kelib chiqqan: yuqori
kuchlanish chiqishi izolyaciyasining teshilishi, qisqa tutashuv tokiga chidamliligi etarli emasligi,
chulg’amning izolyaciyasi buzilishi, chulg’am izolyaciyasi teshilishi.
The article considers the results of the analysis of autotransformers operation mode
monitoring. The time diagram of active load current and oil temperature of autotransformer
TashTES AT-3 is established and during one year changes of these variables and basic
parameters of autotransformer were observed. Technical faults of the power transformer and
high power autotransformer are established and methods of their elimination are determined.
Damage of transformers and autotransformers with voltage of 110-500 kV of about 30% of the
total number of outages which were accompanied by internal short-circuits and two main causes
of damage were determined. The main causes of technological failures, which were not
accompanied by internal short-circuits, are as follows: 20% of failures in operation of the onload tap-changer, 16% of oil leaks from the bushings, 13% of oil leaks and lowering of oil from
the transformer due to violation of welded joints and rubber seals, 4% of engine damage to oil
pumps of the cooling system, 3% of pressure increase in high-voltage hermetic bushings, 2% of
film protection shell damage. The main reasons of technological violations accompanied by
internal short-circuit in the transformer are as follows: breakdown of internal insulation of highvoltage bushings, insufficient short-circuit resistance, wear and tear of winding insulation,
breakdown of insulation
В статье рассматриваются результаты анализа мониторинга режима работы
автотрансформаторов. Установлена временная диаграмма тока активной нагрузки и
температуры масла автотрансформатора ТашТЭС АТ-3 и в течение одного года
наблюдались изменения этих переменных и основных параметров автотрансформатора.
Установлены технические неисправности силового трансформатора и
автотрансформатора большой мощности и созданы методы их устранения. Определен
ущерб трансформаторов и автотрансформаторов напряжением110-500 кВ около 30%
от общего числа отключений, который сопровождался возникновением внутренних
коротких замыканий и установлены две основные причины повреждаемости. Основными
причинами технологических нарушений, не сопровождавшихся внутренними КЗ, являются
следующие:нарушения в работе РПН - 20%, течи масла из вводов - 16%,течи и спуск
масла из трансформатора из-за нарушения сварных соединений и резиновых уплотнений -13%,повреждение двигателей маслонасосов системы охлаждения - 4%,повышение
давления в высоковольтных герметичных вводах - 3%,повреждение оболочки пленочной
защиты - 2%.Основными причинами технологических нарушений, сопровождающиеся
внутренним КЗ в трансформаторе, являются:пробой внутренней изоляции
высоковольтных вводов, недостаточная стойкость при КЗ, износ изоляции обмоток,
пробой изоляции.
| № | Author name | position | Name of organisation |
|---|---|---|---|
| 1 | Isakov F.U. | assistent | TDTU |
| № | Name of reference |
|---|---|
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