MEHRAN UNIVERSITY OF ENGINEERING AND TECHNOLOGY, JAMSHORO DEPARTMENT OF ELECTRICAL ENGINEERING Title of Subject Discipline Term Effective Pre- requisites Marks Assessment : : : : : : : Credit Hours Minim Contact hrs : : Aims : Objectives : Power System Analysis (EL-411) B.E. Electrical Engineering 7th Semester 13EL-Batch and onwards Electrical Network Analysis, Electrical Power Transmission Co-requisite: Theory: 100 Practical : 50 Sessional work : 20 % Sessional work : 40 % Mid Semester Exam: 20 % Semester Lab Exam: 60% Final Semester Exam: 60% 03 01 42 42 This course will lead the students to: Learn to represent the power system components into their equivalent parameters. Be able to analyze various symmetrical as well as electrical faults and calculate fault current levels for various systems. Be able to understand and use and compare various iterative methods of load flow analysis for determining various node voltages and power flows in lines. To learn about the methods of voltage profile control. To understand the electromechanical behavior of various components of power system and effects of various disturbances. To learn about machine dynamics and stability of the system. The objective of this course is to impart adequate knowledge of representing the principal power system equipment and the methods of analysis. Knowledge of operation of the system and analysis of various faults are also to be provided. Contents : REPRESENTATION OF POWER SYSTEM: Single-phase solution of balanced three-phase network. per unit & percentage methods. The impedance and reactance diagrams. SYMMETRICAL FAULTS Transients in RL circuits. Short-circuit currents and the reactances of synchronous machines. Internal voltages of loaded machines under fault conditions. Selection of circuit breakers SYMMETRICAL COMPONENTS AND SEQUENCE NETWORKS: Synthesis of unsymmetrical phasors from their symmetrical Components. symmetrical components of unsymmetrical phasors. Power in terms of Symmetrical Components. Sequence impedance and network of transmission lines. Sequence impedance and network of Synchronous machine, Sequence impedance and network of transformers. Sequence network of Y- and Δ- connected loads. Construction of sequence network of a power system. UNSYMMETRICAL FAULTS: Line to ground fault, Line to line fault and double line to ground fault on an unloaded generator, unsymmetrical faults on power systems, fault through impedance, Comparison of faults on grounded and ungrounded systems. LOAD FLOW STUDIES: Network model equations and their formulation, load flow problems, Gauss Seidal iterative method and algorithm for load flow solution. Newton-Raphsan Method, NR-Algorithm for load flow solution. Note : Practical/Simulation work is based on the above theoretical course Books Recommended Approval: : A.E Guile & W Paterson, Electrical Power Systems, Vol. 1 & 2 (Paragon Press), Latest Edition J. Nagrath& D.P. Kothari, Modern Power System Analysis, (McGraw Hill), Latest Edition W.D .Stevenson, Jr, Elements of Power System Analysis, (McGraw Hill), Latest Edition Mohammad E. El-Harwary, Electrical Power System & Analysis, ,(Reston), TuranGoenin, Latest Edition : Board of Studies, EL. Engg Board of Faculty of EECE Academic Council Res. No. 2.2 Res. No. 7.3 Res. No. 85.10 Dated : 29-05-2013 Dated : 29-12-2014 Dated : 07-07-2015 23 MEHRAN UNIVERSITY OF ENGINEERING AND TECHNOLOGY, JAMSHORO DEPARTMENT OF ELECTRICAL ENGINEERING Title of Subject Discipline Term Effective Pre- requisites Marks Assessment : : : : : : : Credit Hours Minim Contact hrs : : Aims : Objectives : Contents Electrical Machine Design & Maintenance (EL-412) B.E. Electrical Engineering 7th Semester 13EL-Batch and onwards Advanced Electrical Machines Theory: (100) Sessional work : 20 % Mid Semester Exam: 20 % Final Semester Exam: 60% 03 42 Co-requisite: Practical : (50) Sessional work : 40 % Semester Lab Exam: 60% 01 42 To produce clear understanding of Electrical machine design principles and requirements of safety before, during and after operation and accident, The subject teacher must train electrical engineering students in the complete process of design, from drawing table to manufacturing and utilization of the electrical machines and equipment. The student must learn all techniques to enable him in maintaining and repairing the equipment during service of the machine. To open and re-assemble machines. To design electrical machines. To overhaul the machine To prepare maintenance schedule To explain machine operation and repair of machines : (The students will have to submit case studies on machines for sessional evaluation. Theory will be from A & B parts only) PART (A) MACHINE DESIGN THE DESIGN PROBLEM Basic consideration, Specific loads and output equations, Limitations, Design and constructional features of rotating machine, Basic principles of electrical machines and Basic machine forms MATERIALS & ELECTRICAL MACHINES Electrical conducting materials, Magnetic materials, Insulting materials, Classes and Testing of insulating materials HEATING, COOLING AND VENTILATION OF ELECTRICAL MACHINES Modes of heat transfer, The heat flow problems, Temperature rise-time relation, Duty cycles, Enclosures, Cooling and ventilation of rotating electrical machine, Limits of temperature rise and Measurement of temperature rise TRANSFORMER Transformer types, Standard conductors, Cooling, Output equation, Design of core section, Design of insulation and Design of tanks with tubes THREE PHASE AND SINGLE PHASE INDUCTION MOTOR Design, Output equation, Calculation of man dimensions, Specifications, Output equation, Stator design and Rotor design SYNCHRONOUS MACHINES Design, Main dimensions and Design of salient pole rotor MECHANICAL DESIGN Design of shaft, Bearings, mechanical strength of rotors and Design of fan PART (B) INSTALLATION, MAINTENANCE AND TROUBLE SHOOTING OF ELECTRICAL MACHINES Safety and security consideration, Trouble shooting and emergency repairs, installation, commissioning, testing, maintenance and troubleshooting of (i) Transformers and (ii) Induction motors and (iii) AC generators. Note : Practical/Simulation work is based on the above theoretical course 24 Books Recommended : Approval: : M.G. Say Pitman,Alternating Current Machines, , Latest Edition S. RaoKhanna,Testing Commissioning Operation and Maintenance of Electrical Equipment, Latest Edition Board of Studies, EL. Engg Board of Faculty of EECE Academic Council Res. No. 2.2 Res. No. 7.3 Res. No. 85.10 Dated : 29-05-2013 Dated : 29-12-2014 Dated : 07-07-2015 25 MEHRAN UNIVERSITY OF ENGINEERING AND TECHNOLOGY, JAMSHORO DEPARTMENT OF ELECTRICAL ENGINEERING Title of Subject Discipline Term Effective Pre-requisites Marks Assessment : : : : : : : High Voltage Engineering (EL-413) Credit hours Minim Contact hrs : : 01 42 B.E. Electrical Engineering 7th Semester 13EL-Batch and onwards Electrical Power Transmission Theory : (100) Sessional work : 20 % Mid Semester Exam: 20 % Final Semester Exam: 60% 03 42 Co-requisite: Practical: (50) Sessional work : 40 % Semester Lab Exam: 60% Aims : To provide knowledge about effects of increasing transmission voltage level on the insulation of electrical system/ electrical equipment in the system, different breakdown mechanisms in insulating materials, generation measurement and nondestructive testing of insulation. Objectives : : Upon successful Completion of this course the student will be able to: Describe reasons of increasing transmission voltage level from time to time Differentiate between different voltage levels Describe breakdown mechanisms in different insulating materials (Gas, liquids and solids) Describe different methods of generating high voltages (a.c, d.c, impulse) Describe methods of testing insulation without damaging it Contents ELECTRICAL BREAKDOWN IN GASES: Ionization, Townsend Theory, Cathode Processes, Decay Process, Effect of space charge on Breakdown voltage, Stearner Mechanism, Breakdown in compressed gases, Paschen Law, Penning effect, partial breakdown, Mechanism of partial discharge. Applications of corona. Design consideration for Rod – gaps, Flashover mechanism. BREAKDOWN MECHANISM IN SOLIDS AND LIQUIDS: Solid and liquid insulating materials. Intrinsic, Electromechanical, Streamer, Thermal Erosion, Chemical breakdown, Cavitation Breakdown , Suspended particle mechanism, in circuit breakers and uses. GENERATION OF HIGH VOLTAGE: Need for high Voltage, Voltage levels, Problems of Erection & maintenance of High Voltage Systems. Method of generation of alternating high voltage, Transient voltage and direct voltage. Transformers in cascade, Series Resonant circuit, single stage and multistage impulse generator, Half wave rectifier circuits, Full wave rectifier circuits. Voltage Doubler circuit, cascade circuits. MEASUREMENT OF HIGH VOLTAGE: Method of measurement of alternating high voltage, impulse voltage and direct voltage, Sphere gaps, ammeter in series with high impedance, Series capacitance voltmeters (Clubb and Protecue circuit.), potential dividers, Electrostatic voltmeter. NON DESTRUCTIVE INSULATION TEST TECHNIQUES: Dielectric loss measurements and partial discharge detection. Measurement of resistivity & dielectric strength. Note : Practical/Simulation work is based on the above theoretical course Books Recommended (Latest available editions) : E. Kuffel, W.S. Zaengl, High Voltage Engineering Fundamentals, Latest Edition E. Kuffel, M. Abdullah, High Voltage Engineering, Latest Edition T. J. GAGllagher& A. J. Pearmaim, High Voltage Measurement, Testing and Design, Latest Edition Approval: : Board of Studies, EL. Engg Board of Faculty of EECE Academic Council Res. No. 2.2 Res. No. 7.3 Res. No. 85.10 Dated : 29-05-2013 Dated : 29-12-2014 Dated : 07-07-2015 26 MEHRAN UNIVERSITY OF ENGINEERING AND TECHNOLOGY, JAMSHORO DEPARTMENT OF ELECTRICAL ENGINEERING Title of Subject Discipline Term Effective Pre-requisites Marks Assessment : : : : : : : Credit Hrs Minim Contact Hrs : : Power Distribution & Utilization (EL-414) B.E. Electrical Engineering 7th Semester 13EL-Batch and onwards Electrical Power Transmission Theory : (100) Sessional work : 20 % Mid Semester Exam: 20 % Final Semester Exam: 60% 03 42 Co-requisite: Practical: (50) Sessional work : 40 % Semester Lab Exam: 60% 01 42 Aims Objectives Contents : : Upon successful Completion of this course the student will be able to: Understand the concept of distribution systems. Describe the neutral grounding and earthing practices. Describe the importance of power factor and its improvement. Understand the electric heating and welding and their types. Understand the design and development of illumination schemes and their method. Learn about construction and working of electric lamps. Learn about electrochemical processes and working of storage batteries DISTRIBUTION: Introduction to distribution system. Primary, secondary and Tertiary voltages. Radial and Ring Main systems. Estimation of load. Load characteristics. Substation-Switch gear and busbar arrangements. Calculation of voltage drop and regulation in distribution feeders. Power distribution voltages in Pakistan, causes, arcing on power distribution lines. GROUNDING AND EARTHING: Distribution transformers neutral earthing. Earthing resistance. Earthing practice in L.V. network, grounding & bounding. POWER FACTOR: Disadvantages and causes of low Power Factor Methods for improvement. Application of shunt capacitors in distribution network. BATTERIES & ELECTROCHEMICAL PROCESSES: Importance of DC systems Main types of batteries and their working, Battery charging, maintenance testing, Electroplating, Electrolysis, Electro metallurgical processes, Cathodic protection of poles, gas pipes and water structures. HEATING AND WELDING: Electric heating: Resistance, Induction and Dielectric heating. Electric furnaces, Microwave heating. Electric Welding: Resistance welding and its types. ILLUMINATION: Fundamentals of illumination Engineering , laws, units, terms used. Requirements for good lighting. Illumination schemes or various situations (Street lighting, Commercial/Industrial lighting , stadium/flood/stage/spot lighting etc). Types of lamps, their working and relative merit. Note : Practical/Simulation work is based on the above theoretical course Books Recommended (Latest available editions) Approval: : :Luces M. Faulkenberry,Walter Coffer, Electrical Power Distribution Transmission, Latest Edition TuranGonen, Electric Power Distribution System Engineering, Latest Edition Ram Kumar Garg-Dhir-Bhatnagar, Utilization of Electric Energy,Latest Edition B. L. Theraja, Electrical Technology, Latest Edition Board of Studies, EL. Engg Board of Faculty of EECE Academic Council Res. No. 2.2 Res. No. 7.3 Res. No. 85.10 and Dated : 29-05-2013 Dated : 29-12-2014 Dated : 07-07-2015 27