26-05-2012, 01:55 PM
ADVANCED HVDC TECHNOlogies
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Basics in HVDC Transmission
In modern power systems network, it is essential to transmit power from one region to another region in order to meet the load demands.
It can only possible by having Asynchronous power transmission between two regions operating at different frequency.
The Asynchronous power transmission is called HVDC transmission.
The HVDC Technology
The fundamental process that occurs in an HVDC system is rectification at the transmitting end and inverter operation at the receiving end. There are three ways of achieving conversion:-
Natural Commutated Converters.
Capacitor Commutated Converters (CCC)
Forced Commutated Converters.
The components of an HVDC transmission system
The converter station at the transmission and receiving ends.
The transmission medium(solid & oil-filled type cables).
HVDC in the new Electrical Industry
Large amounts of power (>500MW) needed to be transmitted over long distance (>500km)
Interconnecting two AC networks in an asynchronous manner.
HVDC systems enable the bi-directional power flows, which is not possible with AC systems (two parallel systems would be required).
Design
Modern HVDC links can be operated remotely, in view of the semiconductor and microprocessor based control systems included.
Natural Commutated Converters HVDC-3years
Capacitor Commutated Converters (CCC) based HVDC-2years
Forced Commutated Converters based HVDC-1year.
Thyristor based HVDC system versus high voltage AC system
Investment , initial loss levels & loss levels with distance
Overview of HVDC applications
The HVDC systems are mainly used in high voltage transmission systems.
These systems are used to protect the GRIDS by means of capacitor Banks.
The HVDC systems are used to interconnect the grids & distribution substations.
The HVDC links are used to monitor the incipient faults occured in the system during transmission.
HVDC projects in India
Ranchi-Delhi HVDC Transmission
The 1500MW HVDC dipole between chandrapur & padgne has been successfully commissioned in 1999 and that supplies Mumbai.
Vindhyachal 500 MW (1989) back-to-back interconnecting the northern and western regions.
Conclusion
The 2000 MW Talcher - Kolar link is the biggest so far and spans four states: Orissa, Andhra Pradesh, Tamil Nadu and Karnataka
The project cost Rs.700 crores and was executed by Indians
India is racing to a saturation point in electricity availability by 2012. 100,000 mw of power is planned to be added.
HVDC technology will be waiting to ferry this power to all corners of India
[attachment=23161]
Basics in HVDC Transmission
In modern power systems network, it is essential to transmit power from one region to another region in order to meet the load demands.
It can only possible by having Asynchronous power transmission between two regions operating at different frequency.
The Asynchronous power transmission is called HVDC transmission.
The HVDC Technology
The fundamental process that occurs in an HVDC system is rectification at the transmitting end and inverter operation at the receiving end. There are three ways of achieving conversion:-
Natural Commutated Converters.
Capacitor Commutated Converters (CCC)
Forced Commutated Converters.
The components of an HVDC transmission system
The converter station at the transmission and receiving ends.
The transmission medium(solid & oil-filled type cables).
HVDC in the new Electrical Industry
Large amounts of power (>500MW) needed to be transmitted over long distance (>500km)
Interconnecting two AC networks in an asynchronous manner.
HVDC systems enable the bi-directional power flows, which is not possible with AC systems (two parallel systems would be required).
Design
Modern HVDC links can be operated remotely, in view of the semiconductor and microprocessor based control systems included.
Natural Commutated Converters HVDC-3years
Capacitor Commutated Converters (CCC) based HVDC-2years
Forced Commutated Converters based HVDC-1year.
Thyristor based HVDC system versus high voltage AC system
Investment , initial loss levels & loss levels with distance
Overview of HVDC applications
The HVDC systems are mainly used in high voltage transmission systems.
These systems are used to protect the GRIDS by means of capacitor Banks.
The HVDC systems are used to interconnect the grids & distribution substations.
The HVDC links are used to monitor the incipient faults occured in the system during transmission.
HVDC projects in India
Ranchi-Delhi HVDC Transmission
The 1500MW HVDC dipole between chandrapur & padgne has been successfully commissioned in 1999 and that supplies Mumbai.
Vindhyachal 500 MW (1989) back-to-back interconnecting the northern and western regions.
Conclusion
The 2000 MW Talcher - Kolar link is the biggest so far and spans four states: Orissa, Andhra Pradesh, Tamil Nadu and Karnataka
The project cost Rs.700 crores and was executed by Indians
India is racing to a saturation point in electricity availability by 2012. 100,000 mw of power is planned to be added.
HVDC technology will be waiting to ferry this power to all corners of India