NIRMA UNIVERSITY
INSTITUTE OF TECHNOLOGY
M. Tech. Semester - I (EPS), July 2015
3 EE2108: EHV AC AND HVDC TRANSMISSION
LESSON PLANNING
[
Sr.
Topics
Hours
No.
1. GENERAL ASPECTS OF DC TRANSMISSION AND COMPARISON OF 04
IT WITH AC TRANSMISSION
1.1 Comparison of AC and DC transmission
01
1.2 Advantages and Disadvantages of DC transmission
01
1.3 Kinds of DC links and its applications
01
1.4 Components of HVDC transmission, HVDC systems in world and India
01
2.
2.1
2.2
2.3
CONVERTER CIRCUITS
Valve Characteristics, Single phase converters
Three phase converters, Graetz Circuit
Additional six pulse converter circuits and twelve pulse converter
05
01
02
01
3.
3.1
3.2
3.3
3.4
ANALYSIS OF BRIDGE CONVERTER
Analysis with grid control but no overlap
Analysis with grid control and with overlap less than 600
Rectifier characteristic and its equivalent circuit
Operation of an inverter, its parameters, characteristics and equivalent circuit
04
01
01
01
01
4. HVDC SYSTEM CONTROL
4.1 Grid control and its characteristics, limitations of manual control, constant
current versus constant voltage system
4.2 Actual control characteristics, individual and combined control
4.3 Constant Ignition Angle (C.I.A) control, Constant Current (C.C) control,
4.4 Constant Extinction Angle (C.E.A) control
4.5 Firing angle control, individual phase control, equidistant phase control
4.6 Measurement of DC current, voltage, power
06
01
5. HARMONICS AND FILTERS
5.1 Generation of AC and DC harmonics, Characteristic Harmonics and
uncharacteristic harmonics
5.2 Fourier analysis of valve currents and line currents on valve side
5.3 Means of reducing harmonics, AC filters and DC filters
03
01
6. MISOPERATION OF CONVERTERS AND PROTECTION
6.1 Converter Faults: Arc back, Arc through, Misfire, Quenching
6.2 Commutation failure, Short circuit in a converter station, Protection against
overcurrents
6.3 Overvoltages in a converter station, protection against overvoltages
04
01
01
01
01
01
01
01
01
01
01
6.4 DC circuit breaker
01
7.
7.1
7.2
8.
8.1
8.2
8.3
02
01
01
03
01
01
1
REACTIVE POWER CONTROL
Reactive power requirements, Sources of reactive power
Static Var systems
MULTI-TERMINAL HVDC SYSTEM
Constant current series MTDC system and its control
Constant voltage parallel MTDC system and its control
Control of MTDC scheme
9
9.1
9.2
9.3
9.4
9.5
INTRODUCTION TO EHV AC TRANSMISSION
Basic requirement o f a transmission system
Choice of voltage for EHV AC transmission lines
Configuration of an EHV AC transmission link
Problem encountered in EHV transmission
Special features and technical consideration for EHV AC lines
05
01
01
01
01
01
10
10.1
10.2
10.3
10.4
TRANSMISSION LINE TRENDS AND PRELIMINARIES
Standard transmission voltage ,average value of line parameters
Power handling capacity and line loss
Cost of transmission line and equipment
Mechanical consideration in line performance
04
01
01
01
01
11
11.1
11.2
11.3
11.4
11.5
11.6
11.7
11.8
11.9
CALCULATION OF LINE AND GROUND PARAMETERS
Conductor used for EHV Transmission lines ,resistance of conductors
Resistance calculation , effect of resistance of conductor
Temperature rise of conductors and current carrying capacity
Properties of bundled conductors ,advantages of using bundled conductors
Conductor configuration used for bundles in EHV lines
GMR of bundles conductor s
Inductance calculation of EHV line configuration
Line capacitance calculation of EHV line configuration
Surge impedance
09
01
01
01
01
01
01
01
01
1
12
CORONA EFFECTS INCLUDING POWER LOSS AND AUDIBLE
NOISE, RADIO INTERFERENCE
Corona effect, theory of corona formation, factors affecting corona,
Terms used in the analysis of corona effects, Methods of reducing corona
effects
Power loss due to corona, corona loss calculation
Radio interference: Generation and properties, Calculation of RI level,
Minimizing RI and TV interference
Audible Noise: Generation and characteristics,
Limits for AN, calculation of AN Level
06
SHUNT AND SERIES COMPENSATIONS
04
12.1
12.2
12.3
12.4
12.5
12.6
13
01
01
01
01
01
01
13.1 Effect of reactive power flow on voltages at sending and receiving end, Shunt
13.2 Compensation by shunt capacitors and reactors
13..3 Series compensation by series capacitors
13.4 Static VAR system (SVS) and various SVS schemes
01
01
01
01
14
DESIGN OF EHV-AC LINES BASED ON STEADY STATE
02
14.1 Design factors under steady state
01
14.2 Design of EHV-AC transmission lines based on steady state limits
01
Total Hours
60
Text Books :
1. Direct Current Transmission (Vol-I) : E. W. Kimbark
2. HVDC Power Transmission Systems : K. R. Padiyar
3. Extra high voltage AC transmission Engineering: Rakosh Das Begamudre, New
ge International (P) Ltd. New Delhi
Reference Books:
1. High Voltage Direct Current Transmission : C. Adamson, N. G. Hingorani
2. Power Transmission by Direct Current : E. Ulhmann
3. High Voltage Direct Current Transmission : J. Arrillaga
4. HVDC and FACTS controllers : Vijay K. Sood
5. Flexible Power Transmission-HVDC option : J Arrillaga, Y. H. Liu, N.
R. Watson
6. Electric Power Transmission And Distribution :Sivanagaraju S.
7. Electrical Power Transmission And Distribution:M.V.Bakshi U.A.Bakshi
Load Distribution:
2,3 & 4
1&5to 14
Prof. Chanakya B. Bhatt
Prof. Shanker Godwal