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HVDC and FACTS
By,
Brunda Rajesh
Department of EEE
Dr.AIT
HVDC AND FACTS
POWER TRANSMISSION
 HVDC
 High Voltage Direct Current
 A system used for transmitting or exchanging electrical power
by means of direct cu...
AC is
advantageous
and feasible
as:
Voltage
conversion-
simple
Allows high power
& high insulation
level within 1 unit
Sim...
The benefits of direct current (DC) distribution grids include the
elimination of the need for synchronisation of the sign...
HVDC & FACTS are built using Power Electronics devices
 Brings precision of control, dynamic performance of transmission
...
HVDC CONVERTER VALVE HALL THYRISTOR BASED SYSTEM
MAIN COMPONENTS OF
CONVERTOR SYSTEM
THYRISTOR VALVES
CONVERTOR TRANSFORMER
SMOOTHING REACTOR
THYRISTOR VALVES
• THYRISTOR VALVES MAKES THE
CONVERSION FROM AC TO DC
• INDOOR TYPE,AIR INSULATED
• SELF PROTECTING DIREC...
The converter transformers
transforms
the voltage of the AC busbar
to the
required entry voltage of the
converter.
• Prevention of intermittent current
• Limitation of the DC fault currents
• Prevention of resonance in the dc circuit
• R...
ADVANTAGES
• HVDC links do not increase the Short Circuit Level of the
connected systems
• Faults and oscillations don’t transfer acr...
Red-existing links
Blue-proposed
Green-under
construction
THANK
YOU
HVDC & FACTS
HVDC & FACTS
HVDC & FACTS
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HVDC & FACTS

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The presentation gives you the overview of the High Voltage Direct current and Flexible AC transmission systems.
In the presentation, there is the depiction of advantages of Direct current over Alternate current, the current implementation of FACTS around the globe

Published in: Engineering
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HVDC & FACTS

  1. 1. { HVDC and FACTS By, Brunda Rajesh Department of EEE Dr.AIT HVDC AND FACTS
  2. 2. POWER TRANSMISSION
  3. 3.  HVDC  High Voltage Direct Current  A system used for transmitting or exchanging electrical power by means of direct current.  FACTS  Flexible Alternating Current Transmission Systems  Systems used for the dynamic control of voltage, impedance  and phase angle of high voltage AC transmission lines
  4. 4. AC is advantageous and feasible as: Voltage conversion- simple Allows high power & high insulation level within 1 unit Simple device, little maitenance Three phase synchronous generator is superior to dc generator
  5. 5. The benefits of direct current (DC) distribution grids include the elimination of the need for synchronisation of the signal at electrical connectors linking different grids together, reports Pike Research. Using alternating current, waves which are not synchronised with one another can destructively interfere as their positive and negative components cancel each other out. But with DC, there is no need to ensure synchronicity at the electrical connectors between grids, as the waves have only positive components. This could make it easier for countries to link their grids; Pike Research notes that the US is already making connections to Canada and Mexico. WHY DC?
  6. 6. HVDC & FACTS are built using Power Electronics devices  Brings precision of control, dynamic performance of transmission networks  Two technologies exist:  Line Commutated Converter  - Classical HVDC  - Thyristor based  Voltage Source Converter  - VSC HVDC  - Transistor based
  7. 7. HVDC CONVERTER VALVE HALL THYRISTOR BASED SYSTEM
  8. 8. MAIN COMPONENTS OF CONVERTOR SYSTEM THYRISTOR VALVES CONVERTOR TRANSFORMER SMOOTHING REACTOR
  9. 9. THYRISTOR VALVES • THYRISTOR VALVES MAKES THE CONVERSION FROM AC TO DC • INDOOR TYPE,AIR INSULATED • SELF PROTECTING DIRECT-LIGHT- TRIGGERD THYRISTOR DLLT
  10. 10. The converter transformers transforms the voltage of the AC busbar to the required entry voltage of the converter.
  11. 11. • Prevention of intermittent current • Limitation of the DC fault currents • Prevention of resonance in the dc circuit • Reducing harmonic currents including limitation of telephone interference
  12. 12. ADVANTAGES
  13. 13. • HVDC links do not increase the Short Circuit Level of the connected systems • Faults and oscillations don’t transfer across HVDC interconnected systems Firewall against cascading outages • HVDC can transport energy economically and efficiently over longer distances than ac lines or cables • Increased Transmission Capacity in a fixed corridor • Up to 3 times more power per tower, therefore narrower rights of way. ADVANTAGES
  14. 14. Red-existing links Blue-proposed Green-under construction
  15. 15. THANK YOU

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