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Sr. No.

Particulars

Page Number

1 Scheme and Syllabus

2 Assignments

3 Question Bank

4 Mid Question Paper

5 GTU Question Papers

Transmission and Distribution of Electrical Power Course Code: 3340902

GTU/ NITTTR Bhopal/13-14 Gujarat State

GUJARAT TECHNOLOGICAL UNIVERSITY, AHMEDABAD, GUJARAT

COURSE CURRICULUM

COURSE TITLE: TRANSMISSION AND DISTRIBUTION OF ELECTRICAL

POWER

(Code: 3340902 )

Diploma Programmes in which this course is offered

Semester in which offered

Electrical Engineering 4th

semester

1. RATIONALE

The electricity is generated in bulk at remote places near to coal mines (thermal power plants,

dams (hydro power) and transmitted to long distances and then distributed in cities and

villages and to industry. The transmission and distribution of electric power is a complex

issue which requires knowledge of different types of transmission lines and power

equipments. Technicians are required to operate and maintain the power transmission and

distribution system so that electrical energy is continuously available to the consumers

economically. It is therefore required that the technicians should be also able to work

independently in the various area of transmission and distribution system. S/he should be able

to operate various control equipments independently in normal and abnormal conditions.

Essential efforts are made in this course to develop above skills in the students.

2. COMPETENCY

The course content should be taught and implemented with the aim to develop different types

of skills so that students are able to acquire following competency:

Operate and maintain various transmission and distribution system.

3. COURSE OUTCOMES

The theory should be taught and practical should be carried out in such a manner that students

are able to acquire different learning outcomes in cognitive, psychomotor and affective

domain to demonstrate following course outcomes.

i Differentiate various types of transmission and distribution systems.

ii Interpret the various transmission concepts

iii Maintain voltage regulation and efficiency of transmission system.

iv Minimize the voltage drop of distribution systems.

4. TEACHING AND EXAMINATION SCHEME

Teaching Scheme

(In Hours)

Total

Credits

(L+T+P)

Examination Scheme

Theory Marks Practical Marks Total Marks

L T P C ESE PA ESE PA

150 4 0 2 6 70 30 20 30

Legends: L-Lecture; T – Tutorial/Teacher Guided Theory Practice; P - Practical; C – Credit ESE - End

Semester Examination; PA - Progressive Assessment.



5. COURSE DETAILS

Unit Major Learning Outcomes (in cognitive domain)

Topics and Sub-

topics

UNIT – I

Transmission

Line Components

1a. State the features of different

transmission systems.

1b. State the need for different types of

insulators.

1c. State the features of different types

of conductors

1d. Explain the criteria for spacing of

conductors

1e. Solve simple numerical problems

1.1 Classification of

transmission lines.

1.2 Comparison of different

types of transmission

systems.

1.3 Types of conductors-Copper,

Aluminum: Solid, stranded

and bundled conductors.

1.4 Line insulators –

requirements, types, Failure

of insulator.

1.5 String efficiency, methods of

improving string efficiency.

1.6 Spacing between

conductors, span length and

sag calculation.

UNIT– II

Performance Of

Transmission

Lines

2a. Discriminate between skin effect,

proximity effect, Ferranti effect and

corona

2b. Differentiate between efficiency and

regulation of a transmission line

2c. State the effect of low power factor on

the performance

2d. Explain the effects of R, L and C on

1-ph and 3-ph transmission line.

2e. Differentiate the features of the short,

medium and long transmission lines

2f. Describe the importance and

functions of the load dispatch centre.

2g. Solve simple numerical problems

2.1 Skin effect, proximity effect

and Ferranti effect. Corona

2.2 Transposition of conductors

2.3 Losses, efficiency and

regulation of line.

2.4 Performance of single phase

short transmission

2.5 Effect of load power factor

on performance.

2.6 Features of short, medium

and long transmission lines.

2.7 Load dispatch Centre



Unit Major Learning Outcomes (in cognitive domain)

Topics and Sub-

topics

UNIT-III

EHV

Transmission

3a. State the need for EHV transmission

3b. State the features of HVAC

transmission

3c. State the features of HVDC

transmission

3d. Describe the impact of wind power

and solar power on the transmission

system

3e. Describe the impact of other

renewable energy on the

transmission system

3f. State the need for FACTS devices

3g. State the salient features of FACTS

devices

3.1 Requirement of EHV

transmission.

3.2 HVAC Transmission

3.3 HVDC Transmission

3.4 Impact of Wind power and

solar power on Transmission

Systems

3.5 Impact of other renewable

energy sources on

Transmission Systems

3.6 FACTS devices

UNIT–IV

Distribution

System

Components

4a. State the need for distribution system

4b. With sketches describe the various

connection schemes of the

distribution system

4c. Describe the Impact of wind power

on the distribution system

4d. Describe the measures to be adapted

to take of the distributed generation

in the distribution system

4e. Solve simple numerical problems

4.1 AC distribution and its

Requirements

4.2 Connection schemes of

distribution system.

4.3 A.C. distribution calculations.

4.4 Issues of Distributed

Generation Integrated to

distribution Grid.

4.5 Methods of solving A.C.-1

phase and 3 Ø –phase

connected (balanced)

distribution system.

UNIT-V

Sub-Station And

Cables

5a. State the need for electrical

substations

5b. Sketch the elevation layout of a

typical 11/33/66/110 kV electrical

substation with various switchgear

and typical spacing between them

and the ground level as well.

5c. State the selection of the bus bar and

their arrangement.

5d. With sketches describe the various

types of earthing adapted for

substations.

5e. State the procedures to undertake the

earth test and megger test

5.1 Types of substations: 11, 33,

66 and 110 kV

5.2 Selection and location of site

5.3 Main connection schemes

5.4 Substation Equipment

5.5 Busbar arrangement

5f. State the features of unarmored and

armored cables

5g. State the features of different types

of cables used in a substation

5h. Select the cables for relevant

applications using data

sheets/catalogues

5i. Solve simple numerical problems on

selecting cables

5.6 Different types of cables:

unarmored and armored

5.7 Selection of cables as per IS

/data sheet / catalogues



6. SUGGESTED SPECIFICATION TABLE WITH HOURS AND MARKS (THEORY)

Unit

No

Unit Title Teaching

Hours

Distribution of Theory Marks

R

Level

U

Level

A

Level

Total

Marks

I Transmission Line Components. 12 4 5 6 15

II Performance of Transmission Lines 12 4 5 6 15

III EHV Transmission 08 4 3 3 10

IV Distribution System Components 12 4 4 7 15

V Sub-Station and Cables 12 4 4 7 15

Total 56 20 21 29 70

Legends: R = Remember; U = Understand; A = Apply and above levels (Revised Bloom’s taxonomy)

Note: This specification table shall be treated as a general guideline for students and teachers. The actual

distribution of marks in the question paper may vary slightly from above table.

7. SUGGESTED LIST OF EXERCISES/PRACTICALS

The practical/exercises should be properly designed and implemented with an attempt to

develop different types of skills (outcomes in psychomotor and affective domain) so that

students are able to acquire the competencies/programme outcomes. Following is the list of

practical exercises for guidance.

Note: Here only outcomes in psychomotor domain are listed as practical/exercises. However,

if these practical/exercises are completed appropriately, they would also lead to development

of certain outcomes in affective domain which would in turn lead to development of Course

Outcomes related to affective domain. Thus over all development of Programme Outcomes

(as given in a common list at the beginning of curriculum document for this programme)

would be assured.

Faculty should refer to that common list and should ensure that students also acquire

outcomes in affective domain which are required for overall achievement of Programme

Outcomes/Course Outcomes.

S.

No.

Unit

No.

Practical/Tutorial Exercises

(outcomes in psychomotor domain)

Approx

Hours.

required

1 I Demonstrate cable jointing procedures of unarmored cables 02

2 I Demonstrate cable jointing procedures of armored cables 02

3 I Prepare a report on different type of insulators and bushings used in

transmission system with their specifications.

04

4 I

Prepare a report about types of cables used in distribution system by

visiting nearby cable suppliers/industries or otherwise with the help of

internet

04

5 II Prepare Technical Report after visit to the Load Dispatch Centre. 02

6 I and

III

Prepare a report on different type of Transmission Towers used in the

industry

04

7 Prepare a report on different types of connectors used in the

transmission lines.

04

8 IV Prepare a report after studying distribution system of a residential

colony.

02

9 V Interpret and explain the given Blue Print of a Sub-Station, 02

10 V Prepare a report on substation with its layout after visiting a nearby

substation

02

11 V Use crimping tools to fit lugs at cable ends of unarmored cables 02

12 V Use crimping tools to fit lugs at cable ends of armored cables 02



S.

No.

Unit

No.

Practical/Tutorial Exercises

(outcomes in psychomotor domain)

Approx

Hours.

required

13 V Use earth testers 02

14 V Undertake pipe earthing 02

Total Hours (Perform any practical worth 28 hours from above depending upon the

availability of resources so that most units are covered) 36

8. SUGGESTED LIST OF STUDENT ACTIVITIES

Following is the list of proposed student activities such as:

i Visit 66 kV distribution sub-station and draw line diagram with equipment

specifications

ii Visit 132/220/400kV transmission sub-station and draw line diagram with equipment

specifications.

9. SPECIAL INSTRUCTIONAL STRATEGIES (IF ANY)

i Show actual insulators/sample of cables/connectors in the classroom

ii Show charts/slides/photos/video films depicting different types of transmission lines,

substations and their components.

iii Give some field-based projects

iv Give some internet based projects.

10. SUGGESTED LEARNING RESOURCES

A) List of Books

S.

No. Title of Book Author Publication

1 Electric Power Transmission and

Distribution

Sivanagaraju S.

Satyanarayana S.

Pearson Learning, New Delhi,

Latest edition

2 A Course in electrical Power Soni-Gupta-

Bhatnagar

Dhanpat Rai, New Delhi, Latest

edition

3 Principles of power system Mehta V. K. S. Chand and Co., New Delhi,

4 Transmission and

Distribution of electrical energy

Gupta

J. B.

S. K. Khanna, New Delhi, Latest

edition

5 Electrical Power System Wadhwa C. L. New Age, New Delhi, Latest edition

B) List of Major Equipment/ Instrument with Broad Specifications i 3-phase transmission line trainer

ii 1-phase transmission line trainer

iii 11 KV pin insulator

iv 11kV string insulator

v 33 KV string insulator

vi Different types of 2 metre length 1-phase and 3-phase aluminum and copper armored cables

vii Different types of 2 metre length 3-phase and 3-phase aluminum and copper armored cables

viii Cable crimping tool

ix Cable end dongles.

x Earth Tester.

xi Megger.



C) List of Software/Learning Websites

i Open source computer simulation software for transmission system

ii http://www.ketraco.co.ke/learn/

iii http://www.gatewaywestproject.com/faq_general_transmission.aspx

iv http://www.gatewaywestproject.com/construction.aspx

11 . COURSE CURRICULUM DEVELOPMENT COMMITTEE

Faculty Members from Polytechnics

Prof. A. A. Amin, Lecturer in Electrical Engineering, G.P. Vadnagar.

Prof. S. V. Jagani, Lecturer in Electrical Engineering, G.P. Dahod

Prof. V. S. Tejwani, Lecturer in Electrical Engineering, G.P. Rajkot

Prof. N. N. Pandya, Lecturer in Electrical Engineering, G.P. Ahmedabad

Coordinator and Faculty Members from NITTTR, Bhopal

Prof. (Mrs.) C S Rajeshwari, Head of Department of Electrical and Electronics

Engineering.

Prof. Joshua Earnest, Professor, Department of Electrical and Electronics

Engineering.

Academic

Laxmi Institute of Technology, Sarigam

Diploma Electrical Department

Year: 2018-19 ASSIGNMENT: 1

Name of Subject : T.D.E.P Date:

Subject Code : 3340902

Chapter/Unit: 1 Transmission Line Components

Sr. No.

Name of Question Remarks

1 State advantages of overhead Transmission system

2 Define 1) string efficiency 2) bundied conductor

3 Explain different types of insulators with the help of neat sketches

4 Compare AC & DC Transmission system

5 State reason failure of insulator

6 State desirable property of insulator

7 Compare the overhead system versus Underground system for transmission of power

8 State and explain methods of improving string efficiency

9 What is the function of line support? What are the man requirements of line support?

10 Draw & explain different types of line supports

11 What is sag ? what are the factors affecting the sag in transmission line ?

12 State the effect of system voltage & power factor on transmission line efficiency

13 Explain the effect of ice coating on the sag

14 Explain position of transmission system in power supply system

Date of Submission:-

Name & Sign of Subject In-charge :Mr Nimesh Lad

Academic






Chapter/Unit: 2 Performance of transmission lines

Sr. No.


1 Explain ‘’ skin effect ‘’ in transmission line & factor affecting it

2 Define the term ‘’ Ferranti effect ‘’

3 Explain transposition of transmission line

4 What is proximity effect?Explain factors affecting proximity effect.

5 Derive expression for voltage regulation for sort transmition line

6 Give the classification of transmittion line

7 Explain effect of line parameters on transmittion line performance

8 Explain the function of load dispatch center

9 What is corona ? describe the fectors affecting corona & corona loss & explain method to reduce corona loss

10 Explain ferfomance of mideum transmition line


Name & Sign of Subject In-charge : Mr Nimesh Lad

Academic






Chapter/Unit: 3 EHV Transmission

Sr. No.


1 State necessity and limitation of EHV transmission line

2 Explain the line diagram of HVDC transmission system

3 Explain advantages and disadvantages of HVDC transmission system

4 Explain different types of FACTS controller

5 State and explain types of HVDC transmission system

6 Explain the impact of renewable energy on transmission system

7 Explain the scope and use of HVDC system in india

8 State the advantages and limitation of HVAC transmission system

9 State the advantages of FACTS

10 Explain comparison between HVAC & HVDC system

11 Explain necessity of FACTS controller



Academic






Chapter/Unit: 4 Distribution System Components

Sr. No.


1 State and explain method of feeding primary distributor

2 Explain advantages of interconnected grid system

3 What is distributed generation? Describe the issues of distributed generation integrated to distribution grid

4 Explain the difference between primary and secondary distribution system

5 Distinguish between feeder and distributor

6 Explain 3phase 3 wire & 3phase 4 wire ACdistribution system with neat diagram

7 Explain design steps of feeder and distributor

8 Explain method of calculation of single phase AC distributor

9 Explain requirements of good distribution system

10 State advantages and limitation of distributed generation



Academic






Chapter/Unit: 5 sub stations & cables

Sr. No.


1 Draw & explain three core belted cable

2 Explain SL type cable & HSL type cable

3 Draw & explain key diagram of 66kv/11kv distribution substation

4 State the merits & demerits of out door substation

5 Draw & explain pale mounted substation

6 What is sub station give the classification of substation

7 Explain general construction of cables

8 State selection of cable size as per 15

9 Draw the key diagram of 220kv /66kv substation using double busbar system

10 Explain the various control equipment used in substation

11 Draw the layout of control room and also state requirements of control room of substation

12 Compare indoor & outdoor type substation

13 State the function of equipments used in switch yard in substation

14 Explain different of laying of cables

15 State the advantages & disadvantages of underground cables



Academic



Year: 2018-19 TUTORIAL: 1



STRING EFFICIENCY

Sr. No.

Name of tutorial Remarks

1.

In a transmission system, each line conductor is suspected by a string of 3 insulators. The voltage across the top most & middle insulator IS 10KV&12KV. Calculate (1)String efficiency (2) ratio of mutual capacitance between each disc to the earth capacitance

2.

The voltage across the insulators are 60%&40% of the line voltage in a string of two unit suspension insulators. Find the ratio of self capacitance to shunt capacitance of insulators.

3.

A string of insulators units having self capacitance of the disc insulators is 10 times that of capacitance between junction of the disc and earth. Calculate – (1) voltage distribution across each unit in percentage of total voltage across the string . (2) string efficiency

4.

An insulators string consists of a 3 unit each having a safe working voltage of 12kv. The ratio of self capacitance to shunt capacitance of each unit is 8:1. Calculate the maximum safe working voltage of the string. Also calculate the string efficiency.



Academic






CALCULATION OF SAG

Sr. No.


1. In transmission line, weight of the conductor is 2kg/m, span of the line is 200m & the maximum tensile strength is 5000kg.considering factor of safety is 2, find sag.

2.

Calculate actual and vertical sag from following data: Ice coating-0.848kg/m Wind pressure-1.83kg/m Weight of ice coating 0.848kg/m Breaking strength of conductor 525kg Factor of safety-2.5

3. A transmission line having span of 200m the weight of the conductor is 2kg/m & the factor of safety is 2. Calculate the sag.

4.

For the following data compare actual and vertical sag. Weight of the conductor-0.9kg/m Cross sectional area of conductor-128mmsq. Ice coating-12mm Ice density- 915kg/m3 Wind pressure intensity-50kg/msq. Breaking strength of conducting material-42kg/mm2 Span-260m Factor of safety-2.5



Academic






CALCULATION OF 1 PHASE AC DISTRIBUTORS

Sr. No.


1.

A 1-phase distribution 2kgm long supply a loud of 100ampere at 0.9lagging power factor at it’s far end. A load of 100 ampere at 0.8 lagging power factor at mid point both power factor are referred to the voltage at receiving end. Resistance and reactance per km are 0.04ohm and 0.1ohm. if the voltage at the sending end is 230v,then calculate the voltage and power factor to sending end and phase angle of the voltage between end.

2.

A two wire feeder has receiving end and load current of 220 amp. At 0.8 lagging p.f.& at intermediate point load current is 30amp. At 0.707 lagging p.f.the impedance of first section is 0.1+j0.3ohm & 0.08+j24ohm receiving end voltage is 230v both power factor is referred at load point voltage. Calculate the voltage sending

3.

A 1-phase a.c. distribution AB-300m long is feed from point A &it’s load under A is 100amp.at 0.707 lagging power factor. and from point B 200 amp. & p.f. 0.8 laging p.f. & 300m length. The total resistance reactance is 0.2ohm and 0.1ohm per km. calculate total voltage drop in the distributor at the receiving end.

4.

Two wire 400m long at last end of the feeder at 50amp. With 0.7 p.f. lagging at middle of feeder at 100 amp. And 0.8 p.f. lagging it’s first half impedance 0.05+j0.1ohm & second part impedance is 0.1+j0.15ohm if the voltage at receiving end is 400v. find sending end voltage.



LAXMI INSTITUTE OF TECHNOLOGY SARIGAM

DIPLOMA ELECTRICAL DEPARTMENT

QUESTION BANK

Subject: T.D.E.P Subject code:3340902

1. Draw and explain position of transmission system in power supply system.

2. Explain comparison between overhead and underground system.

3. Explain types of line support used for overhead line.

4. Draw and Explain different types of line insulators.

5. Comparation between pin type and suspension type insulators.

6. Define string efficiency and describe method of improving it.

7. State the effect of system voltage and power factor on transmission line efficiency

8. What is sag? Explain factor which affect the sag.

9. State the advantages and disadvantages of outdoor substation over indoor substation .

10. Draw the cross section view of three core belted cable and name ite parts.

11. Explain different methods of laying of cables.

12. State function of equipments used in substation.

13. Explain classification of substation.

14. Compare indoor and outdoor substation.

15. Explain point two be consider for location of substation.

16. Explain classification of underground cables.

17. Explain selection of cable size as per IS.

18. What are the requirements of distribution system .

19. Explain components of distribution system using diagram.

20. Write a classification of distribution system.

21. Explain method of calculation of single phase AC distributors.

22. Explain method of feeding primary distributors.

23. Write design steps of feeders and distributors.

24. Explain method of feeding secondary distributors.

25. What is distributed generation? State advantages of it.S

Laxmi Institute of Technology , Sarigam

Approved by AICTE, New Delhi; Affiliated to Gujarat Technological University,

Ahmedabad Academic Year 2018-19

Centre Code: 691 Examination : Mid Exam 1 Semester: IV Branch: Electrical Date: 29/01/2019 Sub Code: 3340902

Sub: TDEP Time:10:30 TO 11:30 AM Marks: 20

Q.1 Answer any Three 6

1. What is skin effect & Ferranti effect?

2. Define string efficiency.

3. State classification of Transmission line

4. Define Bundle conductor.

5. State advantages of overhead transmission system.

Q.2 Answer any Two 6

(1) Comparison between DC transmission & AC transmission system

(2) Explain comparison between overhead and underground system.

(3) Draw and Explain different types of line insulators. (any one)

(4) Draw & explain types of line support for overhead line. (any one)

Q-3 Answer any Two 8

(1) What is sag? Explain factor which affect the sag.

(2) What is meant by corona? Why does it occur? Explain factor which affect the

corona.

(3) Explain performance of short transmission line.

(4) Explain the function Load dispatch center.

1/3

Seat No.: ________ Enrolment No.______________

GUJARAT TECHNOLOGICAL UNIVERSITY

DIPLOMA ENGINEERING – SEMESTER – IV • EXAMINATION – SUMMER- 2016

Subject Code: 3340902 Date: 12-05 - 2016 Subject Name: Transmission and Distribution of Electrical Power Time: 10:30 AM TO 01:00 PM Total Marks: 70 Instructions:

1. Attempt all questions. 2. Make Suitable assumptions wherever necessary. 3. Figures to the right indicate full marks. 4. Use of programmable & Communication aids are strictly prohibited. 5. Use of only simple calculator is permitted in Mathematics. 6. English version is authentic.

Q.1 Answer any seven out of ten. દશમાથી કોઇપણ સાતના જવાબ આપો. 14

1. State any four advantages of overhead system. ૧. ઓવરહડ સી ટમ ના કોઇપણ ચાર ફાયદાઓ જણાવો.

2. Draw the sketches of Steel Tower. ૨. ટીલ ટાવર ની આ િત દોરો.

3. Define the term “String efficiency”. ૩. ટરીગ એફીશય સી પદની યાખયા આપો.

4. Define Proximity Effect. ૪. પરોકસીમીટી અસર ની યાખયા આપો.

5. Draw Strain type insulator. ૫. ટરઇન પરકારના ઇ યલટર ની આ િત દોરો.

6. Define Bundled conductor. ૬. બ ડ ડ વાહકની યાખયા આપો.

7. Define the term “Ferranti effect”.

૭. “ફરા ટી અસર” પદની યાખયા આપો.

8. State any four limitation of EHV transmission line. ૮. EHV ટરા સમીશન લાઇનના કોઇપણ ચાર લીમીટશન જણાવો.

9. State any four advantages of FACTS controller. ૯. FACTS ક ટરોલરના કોઇપણ ચાર ફાયદાઓ જણાવો.

10. Draw three core belted Cable. ૧૦. તરણ કોર બ ટડ કબ સ દોરો.

Q.2 (a) Explain Pin type Insulator with help of neat sketches. 03

. ર (અ) પીન ટાઇપ ઇ સલટર ની વ છ આ િત દોરી સમજાવો. ૦૩

OR (a) Explain Suspension type Insulator with help of neat sketches. 03 (અ) સસપ શન ટાઇપ ઇ સલટર ની વ છ આ િત ની મદદથી સમજાવો. ૦૩

(b) Derive expression tocalculation of sag with equiv level supports 03 (બ) સમતલ સપોટર માટ સગનીગણતરી માટન સતર તારવો. ૦૩

OR

2/3

(b) Explain the effect of ice coating on the sag. 03 (બ) બરફ ના પડની સગ પર અસર સમજાવો. ૦૩

(c) Weight of conductor of the transmission lines is 1.5 kilo gram per meter length. Span of is 200 meters. The maximum tensile strength of the conductor is 4000 kg.Calculate sag assuming the factor of safety of 2.

04

(ક) એક ટરા સમીશન લાઇનના વાહકન વજન 1.5 િક.ગરા.પરિત મીટર છ.લાઇનની પાન 200 મીટર છ.વાહકની મહ મ ટ સાઇલ ટર થ 4000 િક.ગરા. છ.ફકટર ઓફ સઇ ટી 2 ધારીન સગ ની ગણતરી કરો.

૦૪

OR (c) Explain any two methods of increasing the string efficiency. 04 (ક) ટરીગ એફીશીય સી વધારવાની કોઇપણ બ રીતો સમજવો. ૦૪

(d) Derive expression for voltage regulation for short transmission line. 04 (ડ) શોટર ટરા સમીશન લાઇન માટ વો ટજ રગયલશનન સતર તારવો. ૦૪

OR (d) Compare a.c. and d.c. transmission system. 04 (ડ) એ.સી. અન ડી..સી. ટરા સમીશન સી ટમ ની તલના કરો. ૦૪

Q.3 (a) Explain “Skin Effect” in transmission line. 03

. 3 (અ) ટરા સમીશન લાઇન મા “ કીન ઇફકટ” સમજાવો. ૦૩

OR (a) Draw line diagram and vector diagram of medium transmission line with the

use of nominal T method. 03

(અ) નોમીનલ ટી ધિતનો ઉપયોગ કરીન મ યમ ટરા સમીશન લાઇન માટનો લાઇન ડાયગરામ અન વકટર ડાયગરામ દોરો.

૦૩

(b) Explain the line diagram of HVDC transmission system. 03 (બ) HVDC ટરા સમીશન લાઇનની રખા િત સમજવો. ૦૩

OR (b) Explain necessity of FACTS controller. 03 (બ) FACTS ક ટરોલરની જ િરયાત સમજાવો. ૦૩

(c) State the limitation of HVDC transmission system. 04

(ક) HVDC ટરા સમીશન લાઇન ના લીમીટશન જણાવો. ૦૪ OR (c) Explain the necessity of load dispatch center in the grid system. 04 (ક) ગરીડ સી ટમ મા લોડ ડી પચ સ ટરની જ િરયાત સમજાવો. ૦૪

(d) Write the advantages of HVDC transmission. 04 (ડ) HVDC ટરા સમીશન લાઇન ના ફાયદાઓ લખો. ૦૪

OR (d) Explain any one type of FACTS controller. 04 (ડ) કોઇપણ એક પરકાર નો FACTS ક ટરોલર સમજાવો. ૦૪

Q.4 (a) Explain Radial system offeeding primary distributor. 03

. ૪ (અ) પરાઇમરી િડ ટરી યટર માટ રડીયલ સી ટમ સમજાવો. ૦૩

OR (a) Explain Ring mains system of primary distributor. 03

3/3

(અ) પરાઇમરી િડ ટરી યટર માટ રીગ મઇન સી ટમ સમજાવો. ૦૩

(b) A 2-wire feeder ABC has a load of 120 A at C and of 60 A at B both at pf 0.8 lagging.The Impedance AB is (0.04+j0.08) Ω and that of BC is (0.08+j0.12)Ω. If the voltage at the receiving end C is to be maintained at 400 V. Determine the voltage (i) at A and (ii) at B

04

(બ) બ વાયર િડ ટરી યટરABC મા C પાસ નો લોડ 120A અન B પાસ 60A છ એન બન પાસનોપાવર ફકટર 0.8 લગીગ છ.AB નો ઇ પીડ સ (0.04+j0.08)

Ω અન BC નો ઇ પીડ સ(0.08+j0.12)Ω છ,જો રીસીવીગ એ ડવો ટજ C પર નો વો ટજ 400 V મઇનટઈન કરવાનો હોય તો (1) A પરનો (2) B પરનો વો ટજ શોધો.

૦૪

OR (b) Explain the Advantages of Inter-connected grid type system. 04 (બ) ઇ ટર કનકટડ ગરીડ પરકારની સી ટમના ફાયદાઓ સમજાવો. ૦૪

(c) Derive the expression to calculate sending end voltage and power factor for distributor fed from one end loaded the power factor refers to receiving end voltage.

07

(ક) એક છડ થી સ લાય લતા િડ ટરી યટરના સ ડીગ છડાના વો ટજ તથા પાવર ફકટરની ગણતરી માટન સતર મળવો.લોડનો પાવર ફકટર રીસીવીગ એ ડ વો ટજ પર રીફર કરલ છ.

૦૭

Q.5 (a) Explain SL type cable. 04

. ૫ (અ) SL ટાઇપ કબલ સમજાવો. ૦૪

(b) Draw key diagram of 66kv/11kv distribution substation. 04 (બ) 66kv/11kv િડ ટરી યશન સબ ટશનનો કી ડાયગરામ દોરો. ૦૪

(c) State theadvantages of outdoor substation. 03 (ક) આઉટડોર સબ ટશનના ફાયદાઓ જણાવો. ૦૩

(d) Draw the sketch of Pole Mounted Substation. 03 (ડ) પોલ માઉ ટડ સબ ટશન ની આ િત દોરો. ૦૩

************

1/4

Seat No.: ________ Enrolment No.______________

GUJARAT TECHNOLOGICAL UNIVERSITY DIPLOMA ENGINEERING – SEMESTER – IV-EXAMINATION – WINTER 2015

Subject Code: 3340902 Date: 17/12/2015

Subject Name: Transmission and Distribution

Time: 02:30 PM TO 5:00 PM Total Marks: 70

Instructions:

1. Attempt all questions.

2. Make Suitable assumptions wherever necessary.

3. Figures to the right indicate full marks.

4. Use of programmable & Communication aids are strictly prohibited.

5. Use of only simple calculator is permitted in Mathematics.

6. English version is authentic.

Q.1 Answer any seven out of ten. 14

1. State desirable property of insulator

2. Define sag. Write sag equation.

3. Explain transposition of transmission line.

4. Explain grid system.

5. State advantage of inter connected system .

6. Define feeder.

7. What is distributed generation?

8. State method of feeding primary distributor.

9. What is substation?

10. Function of lightning arrestor.

Q.2 (a) Explain selection of economical voltage of transmission 03

OR

(a) Explain bundled conductor 03

(b) State reason failure of insulator. 03

OR

(b) Explain string efficiency. 03

(c) Write factor affecting sag. 04

OR

(c) Compare the overhead system versus underground system for transmission of

power 04

(d) State and explain methods of improving string efficiency 04

OR

(d) 66KV 3 phase 3wire transmission line having five disc insulators in string

voltage across disc nearest line is 9KV.find string efficiency. 04

Q.3 (a) Explain effect of line parameters on transmission line performance. 03

OR

(a) Explain skin effect. 03

(b) Explain Ferranti effect. 03

OR

(b) Give classification of transmission line. 03

(c) Derive expression for voltage regulation and efficiency for short transmission

line. 04

OR

(c) Calculate loop inductance for 2Km long single phase transmission line.

spacing between two conductor is 2 meter. Diameter of conductor is 15mm 04

2/4

(d) Explain function of load dispatch center. 04

OR

(d) Draw equivalent circuit and vector diagram of medium transmission line using

nominal T method. 04

Q.4 (a) State type of HVDC system. Explain any one. 03

OR

(a) Explain impact of renewable energy on transmission system. 03

(b) Write advantages of HVDC transmission. 04

OR

(b) Write advantages of FACTS. 04

(c) In a two wire 1000mtr long distributor ABC the load current at point C is

100Amp at 0.8 lagging pf and load current at point B is 70 Amp at 0.9 lagging

pf. Both pf are refer to receiving end. If receiving end point C voltage 440 V.

find (1) voltage at point B and A.

(2) Total current.

(3) Sending End pf.

Loop impedance section AB is 0.1+j0.2 Ω and section BC is 0.2+j0.3Ω.

07

Q.5 (a) Give classification of substation. 04

(b) Draw key diagram of 220KV/66KV substation using double busbar system. 04

(c) Explain general construction of cable. 03

(d) State selection of cable size as per IS. 03

ગજરાતી પરશન. ૧ દશમ ાથી કોઇપણ સ તન જવ બ આપો. ૧૪

૧. ઇનસયલટર ન ઇચછનીય ગણધમો જણ વો.

૨. સગ ની વય ખય આપો.સગ મ ટ ના સતર લખો.

૩. ટર નસસમીશન લ ઇન ના ટર નસસપોઝીશન સમજાવો.

૪. ગરીડ સીટમ સમજાવો.

૫. ઇનસટર કનકટડ સીટમ ન ફ યદ સમજાવો.

૬. ફીડર એટલ શા સમજાવો.

૭. ડડટરીબયટડ જનરશન એટલ શા?

૮. પર ઇમરી ડડટરીબયટર ન ફીડ કરવ ની રીત જણ વો.

૯. સબટશન શા છ?

૧૦ લ ઇટનીગ એરટર ના ક યય જણ વો.

પરશન. ર અ ટર નસસમીશન મ ટ ન ઇકોનોમમકલ વોલટજ ની પસાદગી સમજાવો. ૦૩

અથવ

અ બનસડલડ કાડકટર સમજાવો. ૦૩

બ ઇનસયલટર ન ફઇલયોર ન ક રણો જણ વો. ૦૩

અથવ

બ ટરીગ એફીશીયનસસી સમજાવો. ૦૩

ક સગ ન અસર કરત પરીબળો સમજાવો. ૦૪

3/4

અથવ

ક પ વર ટર નસસમીટ કરવ મ ટ ઓવરહડ સીટમ મવરદધ અનસડર ગર ઉનસડ સીટમ ની તલન કરો.

૦૪

ડ ટરીગ એફીશીયનસસી વધ રવ ની રીત લખો અન સમજાવો. ૦૪

અથવ

ડ 66 કવી 3 ફઇઝ તરણ વ યર ટર નસસમીશન લ ઇન મ ટરીગ મ 5 ડડક ઇનસયલટર આવલ છ. લ ઇન ની નજીક ની ડડક ની એકરોસન વોલટજ 9ક.વી. છ.ટરીગ એફીશયનસસી શોધો.૧

૦૪

પરશન. ૩ અ લ ઇન પર મીટર ની ટર નસસમીશન લ ઇન ન ા પરફોમયનસસ ઉપર અસર

સમજાવો. ૦૩

અથવ

અ કીન ઇફકટ સમજાવો. ૦૩

બ ફર નસટી ઇફકટ સમજાવો. ૦૩

અથવ

બ ટર નસસમીશન લ ઇન ના વગીકરણ કરો. ૦૩

ક શોટય ટર નસસમીશન લ ઇન મ ટ વોલટજ રગયલશન અન ક યયકકષમત ના સતર ત રવો.

૦૪

અથવ

ક 2 કી.મી. લ ાબી સીગલ ફઇઝ ટર નસસમીશન લ ઇન નો લપ ઇનસડકટાસ શોધો. બ વ હકો વચછચ પસ 2 મીટર છ. વ હકો નો વય સ 15 મી.મી. છ.

૦૪

ડ લોડ ડીપચ સટર ન ક યો સમજાવો. ૦૪

અથવ

ડ નોમીનલ ટી પધધમત નો મધયમ ટર નસસમીશન લ ઇન મ ટ ઉપયોગ કરીન તનો ઇકકવવલનસટ સડકિટ તથ વકટર ડ યગર મ દોરો.

૦૪

પરશન. ૪ અ HVDC મસટમ ન પરક ર લખો. કોઇ પણ એક સમજાવો. ૦૩

અથવ

અ પનઃપર પય ઉજાય ની ટર નસસમીશન મસટમ પર અસર સમજાવો. ૦૩

બ HVDC ટર નસસમીશન ન ફ યદ લખો. ૦૪

અથવ

બ FACTS ન ફ યદ લખો ૦૪

ક બ વ યર ૧૦૦૦ મીટર લ ાબી ડડસટટરબયટર ABC મ C પ સનો લોડ ૦.૮ લગીગ પ વર ફકટરએ ૧૦૦ Amp અન B પ સનો ૦.૯ લગીગ પ વર ફકટર એ ૭૦ Amp છ.બાન પ વર ફકટર ડરમસવીગ એનસડ વોલટજ ન રફરનસસ મ છ.

૦૭

4/4

જો ડરમસવીગ એનસડ C પરન વોલટજ ૪૪૦ વોલટ હોય તો, 1) B અન A પર ન વોલટજ

2) કલ કરાટ

3) સનસડીગ એનસડ પ વર ફકટર શોધો. સકશન AB નો લપ ઇમપીડનસસ ૦.૧+j૦.૨ અન સકશન BC નો ૦.૨+ j૦.૩ છ.

પરશન. ૫ અ સબટશન ના વગીકરણ આપો. ૦૪

બ ડબલ બસબ ર મસટમ નો ઉપયોગ કરીન ૨૨૦ કવી /૬૬ કવી સબટશન નો કી ડ ય ગર મ દોરો.

૦૪

ક કબલ ની સ મ નસય રચન સમજાવો. ૦૩ ડ IS પરમ ણ કબલ ની સ ઇઝ ની પસાદગી લખો. ૦૩

************

Seat No.: ________ Enrolment No.___________

GUJARAT TECHNOLOGICAL UNIVERSITY Diploma Engineering - SEMESTER–IV • EXAMINATION – WINTER • 2014

Subject Code: 3340902 Date: 28-11-2014

Subject Name: Transmission and Distribution of Electrical Power

Time: 02:30 pm - 05:00 pm Total Marks: 70 Instructions:

1. Attempt all questions.

2. Make suitable assumptions wherever necessary.

3. Figures to the right indicate full marks.

4. English version is considered to be Authentic.

Q.1 (a) Define string efficiency and describe any one method of improving it. 07

(b) Explain skin effect. 07

Q.2 (a) Compare overhead system versus underground system for transmission of

power. 07

(b) State the effect of system voltage and power factor on transmission line

efficiency. 07

OR

(b) Single phase 22kv transmission line , 1000kW power transmitted at 0.8pf

lag. The line resistance 5 ohm and inductance 25mH per conductor .

Calculate (a) voltage regulation (b) efficiency (c) sending end voltage and pf.

07

Q.3 (a) State the function of load dispatch centre. 07

(b) Writhe advantages of HVDC transmission over EHVAC. 07

OR

Q.3 (a) State the advantages of FACTS. 07

(b) Explain HVDC system and type. 07

Q.4 (a) Write design steps of feeder and distributor. 07

(b) A single phase a.c. distributor AB 300 meter long is fed from A loaded as

under

(1) 100 A at 0.707 p.f. lagging 200m from point A.

(2) 200 A at 0.8 p.f. lagging 300m from point A

The total resistance and reactance is 0.2 ohm and 0.1 ohm per kilometer.

Calculate the total voltage drop in the distributor. The load p.f. refers to the far

end.

07

OR

Q. 4 (a) State advantages and limitation of distributed generation. 07

(b) Derive the expression to calculate sending end voltage and power factor for

distributor fed from one end loaded the power factor refers to far end voltage. 07

Q.5 (a) Draw line diagram of 220kv/66kv receiving substation. 07

(b) Compare indoor and outdoor substation. 07

OR

Q.5 (a) State the function of equipments used in switch yard. 07

(b) Explain H type cable. 07

************

ગજરાતી

પરશન. ૧ અ સટરીગ એફીશીયસી ની વયાખયા આપો અન તન સધારવા ની કોઇ એક રીત

સમજાવો.

૦૭

બ સટકીન ઈફકટ સમજાવો. ૦૭

પરશન. ૨ અ ઓવરહડ સીસટટમ વવરધધ અનડર ગરાઉનડ વસસટટમ પાવર રાનસટમીશન લાઈન ની

સરખામણી કરો.

૦૭

બ સીસટટમ વોલટજ અન પાવર ફકટરની રાનસમીશન લાઈન એફીસીયસી પર અસર

જણાવો.

૦૭

અથવા

બ એક સીગલ ફઈઝ લાઈન નો પરવતરોધ ૫ ઓહમ અન ઈનકટનસ ૨૫mH પરવત

કનકટર . આ લાઈન ૨૨kv પર ૧૦૦૦kW પાવર ૦.૮ લગીગ પાવર ફકટર

પર ડીલીવર કર તો

(૧) વોલટજ રગયલશન (૨) કાયય દકષતા તથા (૩) સનડીગ એનડ વોલટજ અન

પાવર ફકટર શોધો.

૦૭

પરશન. ૩ અ લોડ ડીસટપચ સનટર ન કાયય વણયવો. ૦૭

બ HVAC વસસટટમ રાનસમીશન પધધતી ની સરખામણી મા HVDC ના ફાયદા લખો. ૦૭

અથવા

પરશન. ૩ અ FACTS ના ફાયદા લખો. ૦૭

બ HVDC સીસટટમ સમજાવો. ૦૭

પરશન. ૪ અ ફીડર તથા ડડસટરીબયટર ની ડડઝાઈન ના સટટપસ લખો. ૦૭

બ એક સીગલ ફઈઝ AB ડડસટરીબયટર ૩૦૦ મીટર લબાઈ ન તન A ડાથી

સપલાય આપવામા આવ અન તન નીચ પરમાણ ભારીત કરલ .

(૧) A બબિદ થી ૨૦૦ મીટર અતર ૧૦૦ એમપીયર નો ભાર ૦.૭૦૭ લગીગ

પાવર ફકટર

(૨) A બબિદ થી ૩૦૦ મીટર અતર ૨૦૦ એમપીયર નો ભાર ૦.૮ લગીગ પાવર

ફકટર

આ ડીસટરીબયટર નો ડકલોમીટર ડદઠ કલ અવરોધ અન રીએકટસ અનકરમ ૦.૨

ઓહમ અન ૦.૧ ઓહમ .તો ડડસટસટરબયટર મા થતા કલ વોલટજ ડરોપની ગણતરી

કરો.લોડ પાવર ફકટર ન દર ના ડા પરના વોલટજ થી ડરફર કરવામા આવ .

૦૭

અથવા

પરશન. ૪ અ ડડસટસટરબયટડ જનરશનના ફાયદાઓ અન મયાયદાઓ જણાવો. ૦૭

બ એક ડ થી સપલાય લતા ડડસટસટરબયટરના સનડીગ ડાના વોલટજ તથા પાવર

ફકટર ની ગણતરી માટન સતર મળવો.

૦૭

પરશન. ૫ અ ૨૨૦ક.વી. /૬૬ ક.વી. રીસીવીગ સબસટટશન નો લાઈન ડાયગરામ દોરો. ૦૭

બ ઈડોર અન આઉટ ડોર સબ સટટશન વચચ ની સરખામણી કરો. ૦૭

અથવા

પરશન. ૫ અ સબ સટટશન મા વપરાતા સાધનો ના નામ લખો અન તમન કાયય સમજાવો. ૦૭

બ H ટાઈપ કબલ સમજાવો. ૦૭

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COOUURRSSEE FFIILLEE · proximity effect, Ferranti effect and corona 2b.Differentiate between...

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Transcript of COOUURRSSEE FFIILLEE · proximity effect, Ferranti effect and corona 2b.Differentiate between...