Electrical Power Transformer Engineering- The Complete Guide

Expertise in Power Transformers Theory, Performance, Types, Design, Applications, Protection, Testing and Diagnostics

What you'll learn

Understand the operation of transformers in electric networks

Identify the difference between ideal and real transformers

Learn how to obtain the approximate and exact equivalent circuits of transformers

Realize the phasor diagram of ideal and practical transformers

Realize the different types of transformer losses

Understand the efficiency and voltage regulation concepts for assessing the transformer performance

Learn how to perform open and short circuit tests to obtain transformer parameters

Realize the construction, types, and connections of three phase transformers

Learn how to get the per phase model of three phase transformers

Learn how to get the per unit transformer parameters

Case study on the effect of capacitor banks on transformer performance

Complete and simple explanation on transformer vector grroup

Learn how to obtain winding connections of any transformer vector group

Realize the different parts of power transformers

Learn about the core manufacturing

Core type vs. Shell type transformers

Learn about the winding manufacturing

Identify Helical, Crossover, Disc, and Sandwich windings

Relaize the importance of transformer tank and conservator tank

Relaize the importance of transformer oil

Identify the function of Breather unit, Buchholz relay, Surge arrester, and Rod gap in power transformers

Realize the importance of transformer terminals and bushings

Learn about transformer cooling

Learn how to practically calculate the transformer temperature rise

Study the effect of harmonics on transformer operation

Learn about the harmonics mitigation and K-factor transformers

Complete study on transformer inrush current

Study the effect of overfluxing and saturation on transformer operation

Learn about the reasons of humming noise coming from transformer

Learn how to provide the earting of transformer

Identify the transformers arrangements in the electric power system

Power transformers Vs. Distribution Transformers

Learn abut different types of transformers in electric network and their applications

Complete study on current transformers and voltage transformers

Complete study on auto transformers

Learn about shifting, earthing, and booster transformers

Learn about tertiary and high voltagetesting transformers

Complete course on transformer protection

Complete course on transformer testing and commissioning

Complete MATLAB Simulations on electrical transformers

Requirements

Electrical engineering fundamentals

Passion to learn about electrical power transformers from scratch

Description

           Hi and welcome everyone to our course "Electrical Power Transformer Engineering- The Complete Guide"In this course, you are going to learn everything about electrical power transformers starting from the operation, theory, and design of three phase transformers moving to realizing the different types of transformers and their applications in the electric network, ending with a complete study on transformer protection, testing, and commissioning.Thus, this course is designed to take you from zero to hero concerning electric power transformer engineering field.The course is structured as follows:Firstly, a complete overview on the transformer theory and operation is illustrated through the following topics:Transformer theory of operation Ideal vs. Real transformersTransformer equivalent circuit (Exact and approximate)Phasor diagram of ideal and real transformersThen, the next topic will be about the assessment of transformer performance through the following topics:Transformer losses Hysteresis losses vs. Eddy current lossesTransformer efficiency Transformer regulationHow to perform open and short circuit tests to obtain transformer parametersThen, a complete study on three phase transformers is introduced since 99% of power transformers are actually three phase transformers. Thus, three phase transformers are explained in depth through the following topics:Construction, types, and connections of three phase transformersHow to get the per phase model of three phase transformers ?Per unit analysis in three phase transformersHow to get the per unit transformer parametersTransformer vector groupHow to obtain winding connections of any transformer vector group with examples ?Then, you are going to learn about the manufacturing and construction of power transformers explaining all the transformer parts. The following topics will be covered:Transformer core manufacturingCore type vs. Shell type transformersTransformer winding manufacturingHelical, Crossover, Disc, and Sandwich windingsTransformer main and conservator tankImportance of transformer oilBreather unit, Buchholz relay, Surge arrester, and Rod gap in power transformersTransformer terminals and bushingsTransformer cooling methodsThen, the next topic will be about the different factors that affect the transformer operation. These factors are discussed through the following points:Temperature rise and thermal ratingRelation between temperature rise and transformer loadingEffect of harmonics on transformersHarmonics mitigation and K-factor transformersInrush current in transformerOver fluxing and its effect on transformersReasons for humming noise coming from transformerEarthing of transformersThe next topic is about a complete study on different types of transformers and their applications in power systems. The following types of transformers are discussed in details:Power transformersDistribution transformersCurrent Transformers (CT)Voltage Transformers (VT or PT)Auto TransformersEarthing (grounding )transformerPhase shifting transformer (PST)Booster transformerThree winding transformer (tertiary winding)High voltage testing transformer (HVT)Then, we are going to a complete study on transformer protection where we are going to know identify the different transformer faults and provide a suitable protection device to this type of fault. The following outlines are discussed in depth:Types of transformer faultsProtection functions in transformerCore-balance leakage protectionCombined Leakage and phase fault ProtectionDifferential protection of transformersCT connections in transformer differential protectionHow to calculate CT ratios for differential protectionHarmonic restraint relayOver fluxing protection (Volt/Hertz relay)Restricted earth fault protectionOil and winding temperature trip relaysPressure relief device (PRD)Then, The next topic is about transformer testing, commissioning, and diagnostics where we are going to perform routine, type, and special test on power transformers to ensure the healthiness of the transformer before its energization on the site. The following tests are performed and explained:Insulation resistance (IR test)Tan Delta test (Dielectric loss test)Partial discharge (PD test)Hi-Pot test (Applied voltage test)Induced voltage testImpulse voltage testOil breakdown voltage (BDV) testDissolved gas analysis (DGA) TestTransformer turns ratio (TTR) testWinding resistance testMagnetizing current testPercentage impedance testVector group testFinally, Complete MATLAB Simulations on electrical transformers are done such as:MATLAB Simulation of 1-ph and 3-ph transformersPractical transformer Vs. Ideal transformer in MATLAB/SimulinkEfficiency, Losses and Voltage regulation calculations in MATLAB/SimulinkNo load and short circuit test of 1-ph and 3-ph transformers in MATLAB/SimulinkSo, if you are Looking for a COMPREHENSIVE course about Electric Power Transformer Engineering ?              If your answer is YES, then you're definitely in the right place.

Overview

Section 1: Transformer Theory

Lecture 1 What is transformer ?

Lecture 2 How does transformer work?

Lecture 3 E-Book of the course

Lecture 4 Voltage Relations of Transformer

Lecture 5 Ideal transformer

Lecture 6 Real transformer

Lecture 7 Transformer exact equivalent circuit

Lecture 8 Transformer approximate equivalent circuit

Lecture 9 Phasor diagram of ideal transformer

Lecture 10 Phasor diagram of real transformer

Lecture 11 Phasor diagram of approximate equivalent circuit

Lecture 12 Solved example 1

Lecture 13 Solved example 2

Lecture 14 Solved example 3

Section 2: Transformer Performance

Lecture 15 Why is transformer power-efficient device ?

Lecture 16 Transformer losses

Lecture 17 Eddy current losses

Lecture 18 Hysteresis losses

Lecture 19 Transformer efficiency

Lecture 20 Condition for maximum efficiency

Lecture 21 Transformer voltage regulation

Lecture 22 Open circuit test on transformer

Lecture 23 Short circuit test on transformer

Lecture 24 Solved example 1

Lecture 25 Solved example 2

Section 3: Three Phase Transformers

Lecture 26 Construction and types

Lecture 27 Three phase transformer connections

Lecture 28 Per phase model

Lecture 29 Per unit system in transformers

Lecture 30 Solved example 1

Lecture 31 Transformer per unit parameters

Lecture 32 Another formula for transformer regulation

Lecture 33 Solved example 2- part 1

Lecture 34 Solved example 2- part 2

Lecture 35 Case study - Effect of capacitor banks on transformer performance

Lecture 36 Transformer vector group

Lecture 37 How to obtain winding connections of any transformer vector group

Lecture 38 Phasor and winding diagram of Yy0 and Yy6 connections

Lecture 39 Phasor and winding diagram of Yd1 and Dy1 connections

Lecture 40 Phasor and winding diagram of Yd11 and Dy11 connections

Lecture 41 Phasor and winding diagram of Yd5 and Dy5 connections

Section 4: Transformer Construction and Manufacturing

Lecture 42 Parts of power transformer

Lecture 43 Transformer core manufacturing

Lecture 44 Core type transformer

Lecture 45 Shell type transformer

Lecture 46 Stepped core construction

Lecture 47 Transformer winding manufacturing

Lecture 48 Helical winding

Lecture 49 Crossover winding

Lecture 50 Disc winding

Lecture 51 Sandwich winding

Lecture 52 Transformer insulation

Lecture 53 Insulation classes

Lecture 54 Transformer tank

Lecture 55 Transformer Oil

Lecture 56 Conservator tank

Lecture 57 Breather unit

Lecture 58 Buchholz relay

Lecture 59 Explosion vent

Lecture 60 Terminals and Bushings

Lecture 61 Surge arrester

Lecture 62 Rod gap

Lecture 63 Cooling methods for dry-type transformers

Lecture 64 Cooling methods for oil-immersed transformers

Section 5: Factors Affecting Transformer Operation

Lecture 65 Temperature rise and thermal rating

Lecture 66 Temperature rise calculation

Lecture 67 Relation between temperature rise and transformer loading

Lecture 68 Example - Temperature rise calculation

Lecture 69 Harmonics definition and causes

Lecture 70 Effect of harmonics on transformer

Lecture 71 Harmonics mitigation and K-factor transformers

Lecture 72 Inrush current in transformer

Lecture 73 Over fluxing

Lecture 74 Effects of transformer saturation on transformer performance

Lecture 75 Noise in transformers

Lecture 76 Transformer earthing

Section 6: Power and Distribution Transformers

Lecture 77 Transformers Classification

Lecture 78 Transformers arrangements in the electric power system

Lecture 79 Power transformers

Lecture 80 Distribution transformers

Lecture 81 Oil, Dry, and SF6 transformers

Lecture 82 Power transformers Vs. Distribution Transformers

Section 7: Current Transformers

Lecture 83 What is Current Transformer ?

Lecture 84 Equivalent Circuit & Burden of CT

Lecture 85 Types of current transformers

Lecture 86 Saturation of Current Transformer

Lecture 87 Knee Point Voltage of the CT

Lecture 88 Example: Determining the maximum burden of the CT

Lecture 89 Using CT in Electrical Networks: General Application Rule

Lecture 90 Specifications and Definitions of CT Parameters

Lecture 91 Current Transformers Used For Measuring

Lecture 92 Current Transformers Used For Protection

Lecture 93 Example of Current Transformer Rating Plate

Section 8: Voltage Transformers

Lecture 94 What is Voltage Transformer ?

Lecture 95 General Application Rule of VT

Lecture 96 Specifications and Definitions of Voltage Transformer Parameters

Lecture 97 Voltage Transformers Used For Measuring

Lecture 98 Voltage Transformers Used For Protection

Lecture 99 Key Differences between CT &VT

Section 9: Auto Transformers

Lecture 100 What is Auto transformer ?

Lecture 101 Power rating advantage of auto transformer

Lecture 102 Current and voltage relations in auto transformer

Lecture 103 Copper Savings in auto transformer

Lecture 104 Advantages of auto transformer

Lecture 105 Disadvantages of auto transformer

Lecture 106 Applications and use of autotransformers in power system

Section 10: Operation of Special Types of Transformers

Lecture 107 Earthing transformer

Lecture 108 Applications of grounding transformer

Lecture 109 Phase shifting transformer

Lecture 110 Booster transformer

Lecture 111 Three winding transformer

Lecture 112 Voltage stabilization by tertiary winding

Lecture 113 HV testing transformer

Lecture 114 HV testing transformer vs. Power transformer

Section 11: Transformer Protection

Lecture 115 Why do we need transformer protection ?

Lecture 116 Types of transformer faults

Lecture 117 Protection functions in transformer

Lecture 118 Core-balance leakage protection

Lecture 119 Combined Leakage and phase fault Protection

Lecture 120 Differential protection of transformers

Lecture 121 CT connections in transformer differential protection

Lecture 122 Problems and solutions with transformer differential protection

Lecture 123 Percentage (Biased) Differential relay

Lecture 124 Characteristics of biased relay

Lecture 125 Example 1 - How to calculate CT ratios for differential protection

Lecture 126 Example 2 - How to set differential relay settings ?

Lecture 127 Harmonic restraint relay

Lecture 128 Over fluxing protection (Volt/Hertz relay)

Lecture 129 Example 3 - V/F relay setting adjustment

Lecture 130 Over current & Unrestricted earth fault relay

Lecture 131 Restricted earth fault protection

Lecture 132 Difference between REF and differential protection

Lecture 133 Oil temperature trip relay

Lecture 134 Winding temperature trip relay

Lecture 135 Pressure relief device (PRD)

Section 12: Transformer Testing - Tests on transformer insulation

Lecture 136 Insulation resistance (IR test)

Lecture 137 Remarks on Megger test

Lecture 138 What is Tan Delta test ?

Lecture 139 Delta 4000 working principle

Lecture 140 Dielectric loss test procedure

Lecture 141 Partial discharge (PD test)

Lecture 142 Hi-Pot test

Lecture 143 Induced voltage test

Lecture 144 Impulse voltage test

Lecture 145 Surge generator for impulse test

Section 13: Transformer Testing - Tests on transformer oil

Lecture 146 Transformer oil sampling

Lecture 147 Oil breakdown voltage (BDV) test

Lecture 148 Dissolved gas analysis (DGA) Test

Lecture 149 Roger's ratio method of DGA

Section 14: Transformer Testing - Tests for transformer parameters

Lecture 150 Transformer turns ratio (TTR) test

Lecture 151 Transformer turns ratio test using TTR testing kit

Lecture 152 Winding resistance test

Lecture 153 Winding resistance test using winding resistance testing kit

Lecture 154 Magnetizing current test

Lecture 155 Percentage impedance test

Lecture 156 Vector group test

Section 15: MATLAB/Simulink Projects on Single-phase transformers

Lecture 157 Simulation of 1-ph transformers

Lecture 158 Open circuit test of 1-ph transformer in MATLAB/Simulink

Lecture 159 Short circuit test of 1-ph transformer in MATLAB/Simulink

Lecture 160 Efficiency, Losses and Voltage regulation in MATLAB/Simulink

Section 16: MATLAB/Simulink Projects on Three-phase transformers

Lecture 161 Design of 3-ph transformer in MATLAB/Simulink

Lecture 162 Practical transformer Vs. Ideal transformer MATLAB/Simulink

Lecture 163 No load test of 3-ph transformer MATLAB/Simulink

Lecture 164 Short circuit test of 3-ph transformer MATLAB/Simulink

Section 17: Course Exam

Electrical engineering students having passion to learn about electrical transformers from scratch,Engineers and Professionals who work in the Transformer supplier/vendor side,Technicians, Electricians, and Supervisors who want to design, maintain, commission or do anything with transformers