پایان نامه تشخیص و طبقه بندی عیوب داخلی ترانسفورماتور های قدرت با استفاده از درخت تصمیم مبتنی بر شبیه سازی مدل الکتریکی ترانسفورماتور

فهرست پایان نامه تشخیص و طبقه بندی عیوب داخلی ترانسفورماتور های قدرت با استفاده از درخت تصمیم مبتنی بر شبیه سازی مدل الکتریکی ترانسفورماتور

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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