فهرست:
1- مقدمه. 1
1-1- مقدمه. 1
1-2- بیان مسئله. 2
1-3- مروری بر مقالات.. 3
1-4- ساختار پایاننامه. 6
2- عوامل خرابی ترانسفورماتور و روشهای تشخیص آنها. 8
2-1- عوامل خرابی ترانسفورماتور 8
2-1-1- عوامل خرابی از نگاه سیستمی.. 8
2-1-2- عوامل خرابی از نگاه مکان خطا 9
2-2- اجزای ترانسفورماتور و نقش آنها در بروز خطا 10
2-2-1- خطاهای مربوط به تانک... 11
2-2-2- خطاهای مربوط به هسته. 11
2-2-3- خرابی تپچنجر زیر بار 12
2-2-4- خرابی بوشینگ... 12
2-2-5- خرابیهای سیمپیچ.. 12
3- مدلسازی ترانسفورماتور. 17
3-1- تاریخچه مدلسازی ترانسفورماتور 17
3-2- کاربرد مدلهای ترانسفورماتور 18
3-2-1- تحلیل گذرای سیمپیچ.. 18
3-2-2- تحلیل گذرای سیستم.. 18
3-2-3- مکانیابی تخلیه جزیی.. 18
3-2-4- تحلیل پاسخ فرکانسی.. 19
3-3- انواع مدلهای ترانسفورماتور 19
3-3-1- مدل خط انتقال. 20
3-3-2- مدل اندوکتانس نشتی.. 20
3-3-3- مدل مبتنی بر اصل دوگان. 20
3-3-4- مدل میدان الکترومغناطیسی.. 21
3-3-5- مدل مقاومت اندوکتانس و ظرفیت خازنی هندسی (RLC)(متمرکز) 21
3-4- مدل متمرکز الکتریکی.. 21
3-5- محاسبه پارامترهای مداری مدل متمرکز. 23
3-5-1- اندوکتانس 24
3-5-2- مقاوت سیمپیج.. 28
3-5-3- خازن 30
3-5-4- تلفات دی الکتریک... 37
4- پاسخ فرکانسی.. 39
4-1- مقدمه. 39
4-2- تحلیل پاسخ فرکانسی.. 39
4-2-1- ضربه ولتاژ پایین. 40
4-2-2- تحلیل جاروب پاسخ فرکانسی.. 40
4-3- تابع تبدیل.. 41
4-4- آرایشهای مختلف تست پاسخ فرکانسی.. 42
4-4-1- تست نوع اول. 42
4-4-2- تست نوع دوم. 42
4-4-3- تست نوع سوم. 43
4-4-4- تست نوع چهارم. 43
4-5- تحلیل مداری مدل متمرکز. 43
4-5-1- مدل متغیر حالت.. 46
4-5-2- تعیین تابع تبدیل. 47
5- آنالیز خطا. 49
5-1- مقدمه. 49
5-2- پاسخ فرکانسی ترانسفورماتور در حالت سالم.. 49
5-2-1- تست نوع اول برای سیمپیچ فشارقوی. 49
5-2-2- تست نوع سوم. 50
5-3- روش تحلیل اندازهگیریهای FRA.. 51
5-3-1- رنج فرکانسی پایین. 51
5-3-2- رنج فرکانسی متوسط.. 51
5-3-3- رنج فرکانسی بالا. 51
5-4- آنالیز حساسیت.. 52
5-4-1- تغییر فاصله بین دیسکی.. 52
5-4-2- اثر تغییرات شعاع. 54
5-5- اثر عیوب بر نحوه تغییر پاسخ فرکانسی.. 56
5-5-1- تغییرات شعاعی.. 57
5-5-2- خطای جابهجایی محوری. 59
5-5-3- تغییر فضای بین دیسکها 60
5-5-4- خطای اتصال حلقه. 61
5-6- دیاگرام ولتاژ- جریان. 62
6- الگوریتم های طبقه بندی.. 65
6-1- مقدمه. 65
6-2- انتخاب سیستم خبره. 66
6-2-1- شبکههای عصبی.. 66
6-2-2- درخت تصمیم.. 67
6-3- شاخصها 72
6-3-1- شاخصهای آماری. 73
6-3-2- شاخصهای سیگنالی.. 74
6-4- پیادهسازی درخت تصمیم به منظور طبقهبندی خطا در ترانسفورماتور 76
6-4-1- سناریو اول. 77
6-4-2- سناریو دوم 82
7- نتیجه‌گیری و پیشنهادات.. 88
7-1- نتیجه‌گیری. 88
7-2- پیشنهادات.. 90
پیوست الف- وابستگی نفوذپذیری مغناطیسی با فرکانس... 91
پیوست ب- محاسبه ظرفیت خازنی سری در سیمپیج دیسکی.. 93
ب- 1: ظرفیت خازنی معادل دور به دور در یک دیسک... 93
ب- 2: ظرفیت خازنی معادل دیسک به دیسک... 93
پیوست ج- تحلیل مداری مدل متمرکز. 95
ج-1- معادله دیفرانسیل برای ظرفیت خازنی.. 95
ج-2- معادله دیفرانسیل برای اندوکتانس... 95
ج-3- محاسبات ولتاژی و جریانی.. 96
ج-4- تعریف ماتریسهای عناصر مداری با توجه به درخت.. 97
پیوست د- آشنایی با عملکرد درخت تصمیم.. 101
پیوست ی- مشخصات فنی ترانسفورماتور. 106
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