TNPSC Mains Syllabus for Optional Subject: Electrical Engineering
UNIT – I ELECTRICAL CIRCUITS
Circuit elements – Kirchoff’s Laws – Mesh and Nodal Analysis - Network Theorems and Applications for DC and AC circuits: Thevenin’s Theorem, Norton’s Theorem, Superposition Theorem, Maximum Power Transfer Theorem – Sinusoidal Steady State Analysis of RL-RC-RLC Circuits- Resonant Circuits - Natural and Forced Response – Transient Response of RL-RC-RLC Circuits-Two-port networks – Three Phase Circuits.
UNIT – II ELECTRIC AND MAGNETIC FIELDS
Coulomb's Law-Electric Field Intensity-Electric Flux Density-Gauss's Law- Divergence -
Electric Field and Potential due to Point, Line, Plane and Spherical Charge Distributions - Effect of Dielectric Medium - Capacitance of Simple Configurations.
Magnetic Circuits- Magnetomotive force - Reluctance-Faraday’s laws-Lenz’s law-- Biot‐Savart’s law - Ampere’s law - Fleming’s Left and Right Hand Rule-Lorentz force -
Inductance - Self and Mutual Inductance-Dot Convention-Coupled Circuits
UNIT – III MEASUREMENTS AND INSTRUMENTATION
Units and Standards – Static and Dynamic Characteristics-Types of Errors-Error
Analysis – Measurement of Current, Voltage, Power, Power-factor and Energy –
Indicating instruments – Measurement of Resistance, Inductance, Capacitance and
Frequency – Bridge Measurements – Instrument Transformers-Electronic Measuring
Instruments – Multi meters-True RMS meter-Spectrum Analyzer-Power Quality
Analyser- Recording Instruments-X-Y Recorder-Magnetic Recorders-Digital Data
Recorder-Oscilloscopes-LED and LCD Display-Transducers and their applications to the Measurement of Non-Electrical Quantities like Temperature, Pressure, Flow-rate, Displacement, Acceleration, Noise level –– Data Acquisition Systems – A/D and D/A
Converters- Data Transmission Systems.
UNIT – IV CONTROL SYSTEMS
Mathematical Modelling of Physical Systems – Transfer Function - Block Diagrams and Signal Flow Graphs and their Reduction using Mason’s Rule – Time Domain and Frequency Domain Analysis of Linear Time Invariant (LTI) System – Errors for Different Type of Inputs and Stability Criteria for Feedback Systems – Stability Analysis Using Routh-Hurwitz Array – Nyquist Plot and Bode Plot – Root Locus – Gain and Phase Margin – Basic Concepts of Compensator Design – PI,PD and PID Controllers-State
Variable Matrix – System Modeling and Design – Sampled Data System – Stability of Sampled Data System.
UNIT –V ELECTRICAL MACHINES
D.C. Machines – Construction, Excitation methods – Armature Reaction and Commutation – Characteristics and Performance Analysis – Generators and Motors –
Starting and Speed Control – Testing – Losses and Efficiency.
Transformers-Types-Construction and Operation- Testing – Equivalent Circuits – Losses and Efficiency-All day efficiency – Regulation – Parallel Operation – Three
Phase Transformers – Auto-transformer.
Induction Machines – Construction, Principle of operation – Rotating Magnetic Field –
Performance, Torque-Speed Characteristics, No-load and Blocked Rotor tests,
Equivalent Circuit, – Starting and Speed Control – Single-Phase Induction Motors –
Linear Induction Motors – Hysteresis Motors – Reluctance Motors.
Synchronous Machines – Construction – Operating characteristics and Performance analysis – Efficiency and Voltage regulation – Parallel operation – V and inverted V curves of synchronous motors – Power factor improvement-BLDC Motor.
UNIT –VI POWER SYSTEMS
Single Line Diagram of Power System-Per Unit Quantities-Power Generation Types-–
Hydro, Thermal and Nuclear Stations – Pumped storage plants – Co generation–
Economic and operating factors – Modelling and performance characteristics of Power transmission lines and Cables-HVDC transmission–Mechanical Design of Transmission
Lines-Sag-Insulators - ZBus and YBus formulation - Load flow studies –– Shunt and Series Compensation- Symmetrical and Un symmetrical Faults Analysis – Transient and Steady-State Stability of Power Systems – Equal Area Criterion-Voltage and
Frequency Control – Power System Transients – Power System Protection – Circuit
Breakers – Relays –AC and DC Distribution.
UNIT –VII ANALOG AND DIGITAL ELECTRONICS
Semiconductor Devices – PN junctions – Transistors – FET – Zener, Photo diodes and their applications – Rectifier circuits – Voltage regulators – Multipliers.
Biasing circuits – Small signal amplifiers – Frequency response – Multistage amplifiers
– Coupling methods – Large signal amplifiers – Push-pull amplifiers – Feedback amplifiers – Oscillators – Operational amplifiers and its applications – Precision rectifiers
– Multivibrators - Voltage Controlled Oscillator-Timer.
Digital logic gate families (DTL,TTL,ECL,MOS,CMOS) – Logic gates - Simplification of Logic Functions- Design of Combination circuits - Sequential logic circuits-latch–Flipflops– Counters – Registers – Memories(ROM,PLA and FPGA).
UNIT - VIII POWER ELECTRONICS AND DRIVES
Power Semiconductor devices – Ideal and practical attributes of switch - Power DiodeDIAc - SCRs-TRIAC-GTO - power MOSFET-IGBT- Static Characteristics and Principles of Operation- Single and Three Phase AC to DC Converters – Single and Three Phase
AC to AC converters –DC to DC Converters (MOSFET and IGBT based) - Single and
Three Phase Inverters (MOSFET and IGBT based) - Pulse Width Modulation –
Sinusoidal Modulation with Uniform Sampling – Uninterrupted Power Supplies-Switched
Mode Power Supplies – Speed Control of DC and AC Motor Drives– Applications of
Variable Speed Drives
UNIT –IX DIGITAL PROCESSORS AND COMMUNICATION
Architecture of 8085, 8086 and 8051 – Instruction Sets – Assembly Language Programming – Interfacing for memory and I/O: 8255 Programmable Peripheral Interface – 8253 Programmable Timer Interface – 8279 Programmable Keyboard and
Display Interface – 8257 Direct Memory Access Interface - Embedded processors(ARM and PIC basics only).
Classification of Signals – Properties of Discrete Fourier Transforms - FFT Computation
– FIR Filters – IIR Filters: Butterworth Filters – Chebyshev Filters.
Digital Communication Systems: Pulse Code Modulation and Demodulation –
Adaptive Delta Modulation - Frequency Division and Time Division Multiplexing – Data
Communication Network Topologies - 7-layer OSI Protocol.
UNIT –X RENEWABLE ENERGY SOURCES AND STORAGE DEVICES
Renewable Energy – Sources and Features - Solar Radiation Spectrum- Radiation
Measurement-Solar Photovoltaic Cell -Operating Principle- Microhydel- Operating principle- Wind Energy Source- Wind Patterns and Wind Data- Site Selection-Types of
Wind Generators-Fuel Cells-Batteries-Super Capacitors.
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