ELECTRICAL ENGINEERING
PAPER – II
1. Control Systems:
Elements of control systems;
block-diagram representation; open-loop & closed-loop systems; principles
and applications of feed-back. Control system components. LTI systems:
time-domain and transform-domain analysis. Stability: Routh Hurwitz criterion,
root-loci, Bodeplots and polar plots, Nyquist’s criterion; Design of lead-lad
compensators. Proportional, PI, PID controllers. State-variable representation
and analysis of control systems.
2. Microprocessors and
Microcomputers:
PC organisation; CPU, instruction
set, register set, timing diagram, programming, interrupts, memory interfacing, I/O interfacing, programmable
peripheral devices.
3. Measurement and Instrumentation:
Error analysis; measurement of
current, voltage, power, energy, power-factor, resistance, inductance, capacitance
and frequency; bridge measurement. Signal conditioning circuit; Electronic
measuring instruments: multimeter, CRO, digital voltmeter, frequency counter,
Q-meter, spectrum-analyzer, distortionmeter. Transducers: thermocouple,
thermistor, LVDT, strain-gauge, piezo-electric crystal.
4. Power Systems: Analysis and
Control:
Steady-state performance of overhead
transmission lines and cables; principles of active and reactive power transfer
and distribution; per-unit quantities; bus admittance and impedance matrices;
load flow; voltage control and power factor correction; economic operation;
symmetrical components, analysis of symmetrical and unsymmetrical faults.
Concept of system stability: swing curves and equal area criterion. Static VAR system.
Basic concepts of HVDC transmission.
5. Power System Protection:
Principles of overcurrent,
differential and distance protection. Concept of solid state relays. Circuit
breakers. Computer aided protection: Introduction; line bus, generator,
transformer protection; numeric relays and application of DSP to protection.
6. Digital Communication:
Pulse code modulation (PCM),
differential pulse code modulation (DPCM), delta modulation (DM), Digital modulation
and demodulation schemes: amplitude, phase and frequency keying schemes (ASK,
PSK, FSK). Error control coding: error detection and correction, linear block
codes, convolution codes. Information measure and source coding. Data networks,
7-layer architecture.
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