النتائج 1 إلى 4 من 4
  1. #1
    Consultant Engineer الصورة الرمزية أسامة حسن البلخي
    تاريخ التسجيل
    Sep 2014
    الدولة
    مكة المكرمة
    المشاركات
    889

    High Voltage Engineering By M S Naidu V Kamaraj

    High Voltage Engineering By M S Naidu V Kamaraj
    1Introduction
    Iii modern times, high voltages are used for a wide variety of applications coveringthe power systems, industry, and research laboratories. Such applications have becomeessential to sustain modern civilization. High voltages are applied inlaboratories in nuclear research, in particle accelerators, and Van de Graaff generators.For transmission of large bulks of power over long distances, high voltages areindispensable. Also, voltages up to 100 kV are used in electrostatic precipitators, inautomobile ignition coils, etc. X-ray equipment for medical and industrial applicationsalso uses high voltages. Modern high voltage test laboratories employ voltagesup to 6 MV or more. The diverse conditions under which a high voltage apparatus isused necessitate careful design of its insulation and the electrostatic field profiles. Theprincipal media of insulation used are gases, vacuum, solid, and liquid, or a combinationof these. For achieving reliability and economy, a knowledge of the causes ofdeterioration is essential, and the tendency to increase the voltage stress for optimumdesign calls for judicious selection of insulation in relation to the dielectric strength,corona discharges, and other relevant factors. In this chapter some of the generalprinciples used in high voltage technology are discussed

    *******s






    Preface........................................ ........................................ ........................................ ............. vii

    1. Introduction........................................ ........................................ ................................. 1

    1.1 Electric Field Stresses................................ ........................................ ............. 1

    1.2 Gas/Vacuum as Insulator............................... ........................................ ........ 2

    1.3 Liquid Breakdown............................... ........................................ ........................ 3

    1.4 Solid Breakdown............................... ........................................ .......................... 3

    1.5 Estimation and Control of Electric Stress.................................. ............ 4

    1.6 Surge Voltages, their Distribution and Control................................. . 10

    References.............................. ........................................ ........................................ ...... 11

    2. Conduction and Breakdown in Gases........................................ ...... 12

    2.1 Gases as Insulating Media................................... ....................................... 12

    2.2 Ionization Processes............................... ........................................ ............... 12

    2.3 Townsend's Current Growth Equation................................ .................. 16

    2.4 Current Growth in the Presence of Secondary

    Processes............................... ........................................ .................................... 16

    2.5 Townsend's Criterion for Breakdown............................... ..................... 17

    2.6 Experimental Determination of Coefficients α and γ.................... 18

    2.7 Breakdown in Electronegative Gases................................... ................ 20

    2.8 Time Lags for Breakdown............................... ........................................ .... 23

    2.9 Streamer Theory of Breakdown in Gases................................... ....... 24

    2.10 Paschen's Law..................................... ........................................ ..................... 26

    2.11 Breakdown in Non-Uniform Fields and Corona

    Discharges.............................. ........................................ .................................... 29

    2.12 Post-Breakdown Phenomena and Applications............................ .. 33






    This page has been reformatted by Knovel to provide easier navigation.
    [IMG]file:///C:/Users/osamah/AppData/Local/Temp/OICE_C1E9B0D3-AFC5-41C6-81D6-20DF87CE53DC.0/msohtmlclip1/01/clip_image001.gif[/IMG][IMG]file:///C:/Users/osamah/AppData/Local/Temp/OICE_C1E9B0D3-AFC5-41C6-81D6-20DF87CE53DC.0/msohtmlclip1/01/clip_image002.gif[/IMG][IMG]file:///C:/Users/osamah/AppData/Local/Temp/OICE_C1E9B0D3-AFC5-41C6-81D6-20DF87CE53DC.0/msohtmlclip1/01/clip_image003.gif[/IMG][IMG]file:///C:/Users/osamah/AppData/Local/Temp/OICE_C1E9B0D3-AFC5-41C6-81D6-20DF87CE53DC.0/msohtmlclip1/01/clip_image002.gif[/IMG]





    ix


    x *******s

    2.13 Practical Considerations in Using Gases for

    Insulation Purposes................................ ........................................ ................ 35

    2.14 Vacuum Insulation.............................. ........................................ ..................... 39

    Questions............................... ........................................ ........................................ ......... 44

    Worked Examples................................ ........................................ ............................. 45

    References.............................. ........................................ ........................................ ...... 47

    3. Conduction and Breakdown in Liquid

    Dielectrics........................................ ........................................ .................................. 49

    3.1 Liquids as Insulators.............................. ........................................ ................. 49

    3.2 Pure Liquids and Commercial Liquids................................. ................. 52

    3.3 Conduction and Breakdown in Pure Liquids................................. ..... 53

    3.4 Conduction and Breakdown in Commercial Liquids..................... 56

    Questions............................... ........................................ ........................................ ......... 61

    Worked Examples................................ ........................................ ............................. 61

    References.............................. ........................................ ........................................ ...... 63

    4. Breakdown in Solid Dielectrics........................................ ........................ 64

    4.1 Introduction............................ ........................................ ..................................... 64

    4.2 Intrinsic Breakdown............................... ........................................ ................. 65

    4.3 Electromechanical Breakdown............................... ................................. 66

    4.4 Thermal Breakdown............................... ........................................ ................ 66

    4.5 Breakdown of Solid Dielectrics in Practice................................ ........ 68

    4.6 Breakdown in Composite Dielectrics............................. ....................... 72

    4.7 Solid Dielectrics Used in Practice................................ ........................... 77

    Questions............................... ........................................ ........................................ ......... 87

    Worked Examples................................ ........................................ ............................. 88

    References.............................. ........................................ ........................................ ...... 90

    5. Applications of Insulating Materials........................................ ............. 91

    5.1 Introduction............................ ........................................ ..................................... 91

    5.2 Applications in Power Transformers............................ .......................... 92

    5.3 Applications in Rotating Machines................................ .......................... 93
    [IMG]file:///C:/Users/osamah/AppData/Local/Temp/OICE_C1E9B0D3-AFC5-41C6-81D6-20DF87CE53DC.0/msohtmlclip1/01/clip_image004.gif[/IMG][IMG]file:///C:/Users/osamah/AppData/Local/Temp/OICE_C1E9B0D3-AFC5-41C6-81D6-20DF87CE53DC.0/msohtmlclip1/01/clip_image002.gif[/IMG][IMG]file:///C:/Users/osamah/AppData/Local/Temp/OICE_C1E9B0D3-AFC5-41C6-81D6-20DF87CE53DC.0/msohtmlclip1/01/clip_image004.gif[/IMG][IMG]file:///C:/Users/osamah/AppData/Local/Temp/OICE_C1E9B0D3-AFC5-41C6-81D6-20DF87CE53DC.0/msohtmlclip1/01/clip_image002.gif[/IMG]



    This page has been reformatted by Knovel to provide easier navigation.


    *******s xi

    5.4 Applications in Circuit Breakers................................ ............................... 95

    5.5 Applications in Cables.................................. ........................................ ......... 96

    5.6 Applications in Power Capacitors.............................. .............................. 98

    5.7 Applications in Electronic Equipment............................... .................. 100

    References.............................. ........................................ ........................................ ... 103

    6. Generation of High Voltages and Currents................................ 104

    6.1 Generation of High d.c. Voltages................................ .......................... 104

    6.2 Generation of High Alternating Voltages................................ ........... 121

    6.3 Generation of Impulse Voltages................................ ............................ 129

    6.4 Generation of Impulse Currents................................ ............................ 143

    6.5 Tripping and Control of Impulse Generators.............................. ..... 147

    Questions............................... ........................................ ........................................ ...... 150

    Worked Examples................................ ........................................ ........................... 151

    References.............................. ........................................ ........................................ ... 155

    7. Measurement of High Voltages and Currents.......................... 157

    7.1 Measurement of High Direct Current Voltages............................. 157

    7.2 Measurement of High a.c. and Impulse Voltages:

    Introduction 164

    7.3 Measurement of High d.c., a.c. and Impulse

    Currents................................ ........................................ ..................................... 203

    7.4 Cathode Ray Oscillographs for Impulse Voltage and

    Current Measurements............................ ........................................ ......... 213

    Questions............................... ........................................ ........................................ ...... 217

    Worked Examples................................ ........................................ ........................... 219

    References.............................. ........................................ ........................................ ... 224

    8. Overvoltage Phenomenon and Insulation

    Coordination in Electric Power Systems..................................... 226

    8.1 National Causes for Overvoltages - Lightning

    https://ia601306.us.archive.org/27/i...%20Kamaraj.pdf

    لاإله إلا الله محمد رسول الله

  2. #2
    Consultant Engineer الصورة الرمزية أسامة حسن البلخي
    تاريخ التسجيل
    Sep 2014
    الدولة
    مكة المكرمة
    المشاركات
    889

    رد: High Voltage Engineering By M S Naidu V Kamaraj

    هذه عدة ملفات عن الجهد العالي - كاختبارات العوازل - وغيرها والكود اللازم لمتطلبات الجهد العالي - وأرجو المعذرة من حيث أني وجدت الكتاب النظري في المشاركة قد تكرر عندي حيث الواضح مشاركة أخ من قبل بنفس العنوان - وأرجو أن استكمل أشياء أخرى فيها فائدة في هذه المشاركة
    الملفات المرفقة الملفات المرفقة
    لاإله إلا الله محمد رسول الله

  3. #3
    Junior Engineer
    تاريخ التسجيل
    Mar 2015
    الدولة
    تونس
    المشاركات
    29

    Re: High Voltage Engineering By M S Naidu V Kamaraj

    good morning !!

    i am running a single phase load flow with the phase adapter because i don't have the unbalanced load flow feature

    can anyone help to achieve this load flow as soon as possible

    thank you

  4. #4
    Consultant Engineer الصورة الرمزية أسامة حسن البلخي
    تاريخ التسجيل
    Sep 2014
    الدولة
    مكة المكرمة
    المشاركات
    889

    رد: High Voltage Engineering By M S Naidu V Kamaraj

    لابد كما ذكرت لك أخت شيماء في مشاركة أخرى - من توزيع الأحمال وبشكل متوازن في اللوحة على كل الفازات ليحصل التوازن في الحمل - لايمكن أن يحدث التوازن إلا بالتصميم الجيد في اللوحة - ..
    لاإله إلا الله محمد رسول الله

معلومات الموضوع

الأعضاء الذين يشاهدون هذا الموضوع

الذين يشاهدون الموضوع الآن: 1 (0 من الأعضاء و 1 زائر)

المواضيع المتشابهه

  1. High Voltage Engineering by M. S. Naidu
    بواسطة حسن محمد حسين عبد السلام في المنتدى قسم هندسة الجهد العالى High voltage engineering
    مشاركات: 5
    آخر مشاركة: 27-11-12, 09:28 PM
  2. High Voltage Engineering
    بواسطة م/ محمد ابراهيم في المنتدى قسم هندسة الجهد العالى High voltage engineering
    مشاركات: 2
    آخر مشاركة: 04-10-11, 06:31 AM
  3. High Voltage Engineering
    بواسطة magdy elbana في المنتدى قسم محطات التوليد و أنظمة التشغيل و التحكم Power Plants
    مشاركات: 1
    آخر مشاركة: 28-11-09, 01:46 AM
  4. High Voltage Engineering
    بواسطة حفيس أمال في المنتدى قسم محطات التوليد و أنظمة التشغيل و التحكم Power Plants
    مشاركات: 0
    آخر مشاركة: 11-09-07, 02:41 AM
  5. High Voltage Engineering
    بواسطة جيلاني في المنتدى قسم هندسة الجهد العالى High voltage engineering
    مشاركات: 12
    آخر مشاركة: 11-01-07, 05:04 AM

المفضلات

المفضلات

ضوابط المشاركة

  • لا تستطيع إضافة مواضيع جديدة
  • لا تستطيع الرد على المواضيع
  • لا تستطيع إرفاق ملفات
  • لا تستطيع تعديل مشاركاتك
  •  

 

 

Flag Counter