hvdc presentation (amity)
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PURUSHOTTAM SHARMA
SAMEER GUPTA
SHASHANK RAIZADA
Amity University Rajasthan
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Uses of Transmission lines :- To transfer the energy or signal from the
transmitter to the receiver. It acts as communication media. In most cases, transmission lines are metallic
conductors. Few e.g. of Transmission lines are:-
Parallel wiresTwisted pair wiresRibbon typeCo-axial cablesMicro-strip lines
Wave guides
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CONVENTIONALLY POWER TRANSMISSION IS EFFECTED THROUGH HVAC
SYSTEMS ALL OVER THE WORLD.
HVAC TRANSMISSION IS HAVING SEVER LIMITATIONS LIKE LINE LENGTH ,
UNCONTROLLED POWER FLOW, OVER/LOW VOLTAGES DURING LIGHTLY / OVER
LOADED CONDITIONS,STABILITY PROBLEMS,FAULT ISOLATION ETC
CONSIDERING THE DISADVANTAGES OF HVAC SYSTEM AND THE ADVANTAGES
OF HVDC TRANSMISSION , POWERGRID HAS CHOOSEN HVDC TRANSMISSION
FOR TRANSFERRING 2000 MW .
COMPARISION OF HVAC & HVDC SYSTEMS
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CONTROLLED POWER
ASYNCHRONOUS OPERATION POSSIBLE BETWEEN
REGIONS HAVING DIFFERENT ELECTRICAL
PARAMETERS
NO RESTRICTION ON LINE LENGTH AS NO
REACTANCE IN DC LINES
ADVANTAGES OF HVDC OVER HVAC
TRANSMISSION
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COST: AC vs DC Transmission
Terminal Cost AC
Terminal Cost DC
Line Cost DC
Line Cost AC
Break Even Distance
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HVDC IN INDIABack-to-Back
HVDC LINK CONNECTINGREGION
CAPACITY(MW)
Vindyachal North West 2 x 250
Chandrapur West South 2 x 500
Vizag I East South 500
Sasaram East North 500Vizag II East South 500
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BASIC PRINCIPLES
OF
HVDC TRANSMISSION
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Direct current is put to use in common life for drivingour portable devices, UPSs, battery systems and vastlyin railway .
USE OF D
DC AS A MEANS OF TRANSMISSION
This has been possible with beginning of
High power/ high current capability thyristor.&
Fast acting computerized controls
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If DC is required to be used for transmission
&since our primary source of power is A.C ,
The following are three basic steps:-
1. Convert AC into DC ( rectifier)
2. Transmit DC
3. Convert DC into AC ( inverter )
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