Aktu Syllabus for HVDC and AC Transmission (KEE-072) Btech

Explore the concepts of high-voltage direct current and alternating current transmission systems as you uncover the AKTU Btech syllabus on HVDC and AC Transmission. Explore the world of effective and trustworthy power transfer.

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UNIT-1: INTRODUCTION OF EHV TRANSMISSION

• EHV transmission, standard transmission voltage
• Comparison of EHV AC & DC transmission systems and their applications & limitations 
• Surface voltage gradients in conductor
• Distribution of voltage gradients on sub-conductors
• Mechanical considerations of transmission lines
• Modern trends in EHV AC and DC transmission
• UHVAC transmission system. 

UNIT-2: EHV AC TRANSMISSION

• Corona loss formulas
• Corona current
• Audible noise generation and characteristics corona pulses their generation and properties 
• Radio interference (RI) effects
• Over voltage due to switching
• Ferro-resonance
• Reduction of switching surges on EHV system
• Principle of half wave transmission. 

UNIT-3: EXTRA HIGH VOLTAGE TESTING

• Characteristics and generation of impulse voltage
• Generation of high AC and DC voltages
• Measurement of high voltage by sphere gaps and potential dividers. 
• Consideration for Design of EHV Lines: Design factors under steady state limits
• EHV line insulation design based upon transient over voltages
• Effects of pollution on performance of EHV lines. 

UNIT-4: EHV DC TRANSMISSION-I

• Types of dc links
• Converter station
• Choice of converter configuration and pulse number
• Effect of source inductance on operation of converters
• Working principle and characteristics of a 6 pulse converter with two & three valve conduction mode
• Three valve conduction mode and three and four valve conduction mode 
• Principle of DC link control, converter controls characteristics
• Firing angle control
• Current and excitation angle control
• Power control
• Starting and stopping of DC link. 

UNIT-5: EHV DC TRANSMISSION-II

• Converter faults
• Protection against over currents and over voltages 
• Smoothing reactors
• Generation of harmonics
• AC and DC filters
• Multi Terminal D systems (MTDC): Types, control, protection and applications.

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