Name of the University : Mahatma Gandhi University
Department : Electrical and Electronics Engineering
Degree : M.Tech
Subject Code/Name : MEEPS 206 – 2/EHV AC AND DC Transmission
Sem : II
Website : mgu.ac.in
Document Type : Model Question Paper
Download Model/Sample Question Paper : https://www.pdfquestion.in/uploads/mgu.ac.in/5299-MEEPS%20206_2%20EHV%20AC%20and%20DC%20Transmission.doc
MGU EHV AC & DC Transmission Question Paper
M.TECH Degree Examination :
Model Question Paper :
Second semester :
Related : MGU MEEPS201 Power System Control & Security M.Tech Model Question Paper : www.pdfquestion.in/5295.html
Branch: Electrical and Electronics Engineering
Specialization: Power Systems
MEEPS 206 – 2 EHV AC AND DC Transmission :L(ELECTIVE IV)
(2011 admission onwards)
[Regular/ Supplementary]
Time: Three hours
Maximum: 100 marks
Answer all questions :
Each full question carries 25 marks :
1. (a) Draw equivalent circuit of a long transmission line. Derive the relation between sending and receiving end voltages and currents (15 marks)
(b) A 3 phase overhead transmission line has a total series impedance per phase of 200 ?800 ohms and a total shunt admittance of 0.0013?900 seimens per phase. The line delivers a load of 80 mW at 0.8 pf lagging and 220 kV between the lines. Determine the sending end voltage and current by rigorous method. (10 marks)
Or
2. (a) With respect to long transmission line, give physical interpretation of the terms ‘characteristic impedance’ and ‘propogation constant’. What is meant by surge impedance? (10 marks)
(b) A long transmission line has the following auxiliary constants: A=D=0.0945?1.020, B=82.3 ?73.030 ? and C=0.001376 ?90.40 s. Determine (i) Equivalent T network; and (ii) p network (15 marks)
3. (a) Explain the effect of over voltages due to low induction current and capacitive current (15 marks)
(b) Write short note on sequential impedance (10marks)
Or
4. Write short note on following
(i) Voltage divider
(ii) High speed oscilloscope
(iii) Peak voltmeter and sphere gap
(iv) Digital recorder
(v) Measurement of partial discharge (5 x 5=25 marks)
5. (a)What is the principle of HVDC system operation? Discuss the technical and economic advantages of d.c. systems over a.c. systems (10 marks)
(b)With a block schematic, explain the main components of a HVDC transmission system (15 marks)
Or
6. (a)Draw the equivalent circuit of a 3 phase full wave bridge converter and the waveforms of voltages and currents. Obtain the expansion for average direct voltage of the converter (15 marks)
(b) Discuss briefly on the abnormal operations of converters (10 marks)
7. (a)Explain the basic principles of HVDC link control. What are the factors that influence the selection of control characteristics (15 marks)
(b) With a block schematic, explain the current control system with equidistant pulse control (10 marks)
Or
8. (a) Discuss on the filters used on both sides of HVDC system to reduce the harmonics (15 marks)
(b) Discuss briefly on the modeling of HVDC system (10 marks)[4×25=100 marks]
M.Tech Degree Examination :
Model Question Paper : Second semester
Branch : Electrical and Electronics Engineering;
Specialization : Power Systems
MEEPS 206 – 2 Ehv Ac And Dc Transmission (Elective IV) (2011 admission onwards) [Regular/ Supplementary]
Time : Three hours
Maximum : 100 marks
Answer all questions :
Each full question carries 25 marks
1. (a) Draw equivalent circuit of a long transmission line. Derive the relation between sending and receiving end voltages and currents (15 marks)
(b) A 3 phase overhead transmission line has a total series impedance per phase of 200 ∟800 ohms and a total shunt admittance of 0.0013∟900 seimens per phase. The line delivers a load of 80 mW at 0.8 pf lagging and 220 kV between the lines. Determine the sending end voltage and current by rigorous method. (10 marks)
Or
2. (a) With respect to long transmission line, give physical interpretation of the terms ‘characteristic impedance’ and ‘propogation constant’. What is meant by surge impedance? (10 marks)
(b) A long transmission line has the following auxiliary constants: A=D=0.0945∟1.020, B=82.3 ∟73.030 Ω and C=0.001376 ∟90.40 s. Determine (i) Equivalent T network; and (ii) π network (15 marks)
3. (a) Explain the effect of over voltages due to low induction current and capacitive current (15 marks)
(b) Write short note on sequential impedance (10marks)
Or
4. Write short note on following
(i) Voltage divider
(ii) High speed oscilloscope
(iii) Peak voltmeter and sphere gap
(iv) Digital recorder
(v) Measurement of partial discharge (5 x 5=25 marks)
5. (a)What is the principle of HVDC system operation? Discuss the technical and economic advantages of d.c. systems over a.c. systems (10 marks)
(b)With a block schematic, explain the main components of a HVDC transmission system (15 marks)
Or
6. (a)Draw the equivalent circuit of a 3 phase full wave bridge converter and the waveforms of voltages and currents. Obtain the expansion for average direct voltage of the converter (15 marks)
(b) Discuss briefly on the abnormal operations of converters (10 marks)
7. (a)Explain the basic principles of HVDC link control. What are the factors that influence the selection of control characteristics (15 marks)
(b) With a block schematic, explain the current control system with equidistant pulse control (10 marks)
Or
8. (a) Discuss on the filters used on both sides of HVDC system to reduce the harmonics (15 marks)
(b) Discuss briefly on the modeling of HVDC system (10 marks)