HVDC Light is a high voltage direct current transmission system that uses voltage source converter technology and underground or undersea cables to transmit electric power over long distances more efficiently than alternating current. It utilizes advanced power electronics to convert electric power to direct current for transmission through cables. Some key advantages include higher power transfer capacity, independent control of active and reactive power, smaller installation size, and no requirement for synchronous operation or large transformers. HVDC Light is well-suited for transmitting renewable energy and connecting offshore wind farms over long distances by cable.

1. HVDC LIGHTHVDC LIGHT
A TOOL FOR TRANSMISSION OF ELECTRIC POWERA TOOL FOR TRANSMISSION OF ELECTRIC POWER
Sunday, January 18, 2015 V.J.I.T - Dept of EEE
SUBMITTED BY:SUBMITTED BY:
J Saikrishna goudJ Saikrishna goud
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08911A028608911A0286

2. CONTENTSCONTENTS
 INTRODUCTION
 NEED FOR HVDC
 HVDC LIGHT CONVERTER STATION
 FEATURES OF HVDC LIGHT
 ADVANTAGES
 CONCLUSION
 REFERENCES
Sunday, January 18, 2015 V.J.I.T - Dept of EEE

3. INTRODUCTIONINTRODUCTION
 HVDC light is high voltage direct current
transmission system based on solid state
voltage source technology.
 Utilizes most advanced power electronics and
semiconductors.
 Power is transmitted via underground/undersea
cables.
 More efficient way of transmitting power over
distances above ~50km.
Sunday, January 18, 2015 V.J.I.T - Dept of EEE

4. Need for HVDCNeed for HVDC
 HVDC stands for high voltage direct current, a well-proven technology used
to transmit electricity over long distances by overhead transmission lines or
submarine cables.
 It is also used to interconnect separate power systems, where traditional
alternating current (AC) connections cannot be used.
Sunday, January 18, 2015 V.J.I.T - Dept of EEE

5. HVDC light installationsHVDC light installations
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6. Power transformerPower transformer
 The transformer is an ordinary single
phase or three phase with a tap changer
on the secondary side
 The current in the transformer winding
contains hardly any harmonics and is not
exposed to any dc voltage
 The transformer may be provided with a
tertiary winding to feed the station auxiliary
power system
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7. HVDC CablesHVDC Cables
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8. Advantages of HVDC cablesAdvantages of HVDC cables
 HVDC light cables are installed close in bipolar pairs with
anti parallel currents and thus eliminating the magnetic
fields
 They have no technical limitation for distance as in ac
cables
 Its strength and flexibility makes it well suited for several
installation conditions
Sunday, January 18, 2015 V.J.I.T - Dept of EEE

9. Kinds of dc linksKinds of dc links
 Monopolar lines
 Bipolar lines
 Homopolar lines
 Line has one conductor and earth is used as return
conductor(mono) -ve
 Line has two conductors one +ve and one -ve(bipolar)
 Line have two or more conductor having same polarity
usually -ve
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10. Dc linksDc links
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11. Ground returnGround return
 It uses t/m lines use ground or sea water as the return
conductor
 For the same length of the t/m line the resistance offered
by the ground in case of dc is much less as compared to
ac
 Earth resistance in case of dc is independent of line length
Sunday, January 18, 2015 V.J.I.T - Dept of EEE

12. Advantages of HVDCAdvantages of HVDC
 Power per conductor is high and power per circuit is same
 Saving in insulation cost
 No stability problem
 Less corona loss
 No interference effect
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13. Power per conductor is highPower per conductor is high
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14. Power per circuit is samePower per circuit is same
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15. Less corona lossLess corona loss
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16. NEW HVDC PROJECT IN INDIA
 Commissioning year:2015
 Power rating:6 000 MW (multiterminal)
 AC voltage:400 kV (all stations)
 DC voltage:±800 kV
 Length of overhead DC line:1 728 km
 Main reason for choosing HVDC:Long
distance, bulk power
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17. SINGLE LINE DIAGRAM
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18. ConclusionsConclusions
 Opportunity to transmit small scale power long distances via
cable
 Opportunity to connect to passive load
 Separate control of active and reactive power
 No contribution to short circuit currents
 No need of fast communication
 Opportunity to operate without transformers
 Small and compact
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19. ReferencesReferences
1. Direct current transmission by Edward Wilson
Kimbark
2.The ABCs of HVDC transmission
technologies,IEEE Power and Energy
Magazine,2006
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20. Thank youThank you
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