1. www.beprojectidea.blogspot.com
MAJOR PROJECT

2. www.beprojectidea.blogspot.com
A project report On :-
TRANSMISSION OF
BULK POWER
Under Guidence Of :- Prof. Vivekanand
Dept. of E.E.E.
L.N.J.P.I.T. Chapra
Submitted in partial
fulfillment of the requirement
for in the degree of B. Tech.
(Electrical & Electronics
Engineering)

3. Electrical & Electronics Engineering
Submitted By:-
NAME COLLEGE ROLL NO. UNIV. ROLL. NO.
1.HARERAM MISHRA 2012-E-28 103168117051
2.PRAKASH KUMAR JHA 2012-E-34 103168117033
3.VISHAL KUMAR BHARTI 2012-E-16 103168117054
4.RAJMANI SINHA 2012-E-42 103168117045
5.ASHUTOSH KUMAR 2012-E-24 103168117028
Dept. Of
Session : 2012-2016

5. About Bulk Power Transmission
AC Transmission
DC Transmission
www.beprojectidea.blogspot.com

6. Need of High Voltage Transmission
High voltage is used for transmission to reduce the
energy lost in the resistance of the wires.
Transmission Issues for Offshore Wind Farms.
www.beprojectidea.blogspot.com

7. History of HVDC
 1930s
Efficient static AC/DC conversion (mercury arc valves) was
made possible.
 1940s
High Voltage DC (HVDC) bulk power transmission was studied in
Germany.
 1954s
First commercial application in Sweden: submarine link between
mainland and Gotland island (100 kV-20 MW-90 km).
1970s
Thyristors (SCRs) took over, HVDC operation voltages attain 600 kV,
transmitted power over 3000 MW.
Today...
www.beprojectidea.blogspot.com

8. Why HVDC Systems?
 HVDC is the unique solution to
interconnect asynchronous
systems,
e.g. different grid frequencies.
 HVDC represents the most
economical solution for distances
greater than 600 km.
 HVDC is the solution for long
submarine transmission.
www.beprojectidea.blogspot.com

9. Main Components of an HVDC
Transmission
www.beprojectidea.blogspot.com

10. Convertor
Classical HVDC Convertor
 6-pulse convertor
 12-pulse convertor
www.beprojectidea.blogspot.com

11. Conti….
Firing angle
 Maximum DC voltage when α = 0°
 Rectifier operation when 0°< α < 90°
 Inverter operation When 90°< α < 180°.
www.beprojectidea.blogspot.com

12. VSC HVDC
Two Technology
 HVDC Light
 HVDC Plus
HVDC Light
www.beprojectidea.blogspot.com

13. Conti….
HVDC Plus
HVDC Plus switching
module
www.beprojectidea.blogspot.com

14. DC Smoothing Reactors
 Having a large inductance (0.27H to 1.5H).
 Connected in series with the converter before the DC filter.
 Main objectives of the reactor.
Filter
 AC filter offer low impedance to harmonic frequencies.
 DC filters diverts DC harmonics to earth.
 High frequency filter is reduce the interference to the power line
carrier communication.
Reactive Source
 No reactive power is transmitted over a DC line.
 Normally requirement of reactive power is about 50 percent
of transmitted power.
www.beprojectidea.blogspot.com

15. Return Path
 Ground Return
 Metallic Return
www.beprojectidea.blogspot.com

16. Applications of VSC HVDC
Industrial Networks
 Supply power to oil and gas platforms.
Wind Farms
 Limited footprint and weight.
Weak Networks
 It is not desirable to connect weak networks, characterized
by a low short-circuit ratio (SCR), with classic HVDC
systems.
www.beprojectidea.blogspot.com

17. Conclusion :
The transmission of bulk power through HVDC is
growing. The recent progress in power electronics
provides a new future for the HVDC technology. The
VSC HVDC is believed to be a strong contender for the
flexible transmission system.
www.beprojectidea.blogspot.com

18. Thank You
www.beprojectidea.blogspot.com