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What is converter transformer and what its function in HVDC transmission?
Wiki User
∙ 13y ago
It is a transformer that is made for the converters. It is (usually) wired with a Wye AND and Delta output. This allows the transformer to output a total of 12, 30 degrees out-of-phase pulses. This gives rise to many advantages with filtering, efficiency, etc...
Wiki User
∙ 13y ago
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HVDC transmission lines being used in Pakistan?
it will be implemented soon...planning is in progress
When was HVDC Cross-Channel created?
HVDC Cross-Channel was created in 1986.
Distinguish between HVDC and HVAC transmission?
DC versus AC.The vast majority of electric power transmissions use threephasealternating current. The reasons behind a choice ofHVDC instead of AC to transmit power in a specific caseare often numerous and complex. Each individualtransmission project will display its own set of reasonsjustifying the choice.A. General characteristicsThe most common arguments favouring HVDC are:1) Investment cost. A HVDC transmission line costsless than an AC line for the same transmissioncapacity. However, the terminal stations are moreexpensive in the HVDC case due to the fact thatthey must perform the conversion from AC to DCand vice versa. On the other hand, the costs oftransmission medium (overhead lines and cables),land acquisition/right-of-way costs are lower in theHVDC case. Moreover, the operation andmaintenance costs are lower in the HVDC case.Initial loss levels are higher in the HVDC system,but they do not vary with distance. In contrast, losslevels increase with distance in a high voltage ACsystemAbove a certain distance, the so called "break-evendistance", the HVDC alternative will always givethe lowest cost. The break-even-distance is muchsmaller for submarine cables (typically about 50km) than for an overhead line transmission. Thedistance depends on several factors, as transmissionmedium, different local aspects (permits, cost oflocal labour etc.) and an analysis must be made foreach individual case (Fig. 3).2) Long distance water crossing. In a long AC cabletransmission, the reactive power flow due to thelarge cable capacitance will limit the maximumtransmission distance. With HVDC there is no suchlimitation, why, for long cable links, HVDC is theonly viable technical alternative.3) Lower losses. An optimized HVDC transmission linehas lower losses than AC lines for the same powercapacity. The losses in the converter stations have ofcourse to be added, but since they are only about 0.6% of the transmitted power in each station, the totalHVDC transmission losses come out lower than theAC losses in practically all cases. HVDC cables alsohave lower losses than AC cables.4) Asynchronous connection. It is sometimes difficult orimpossible to connect two AC networks due tostability reasons. In such cases HVDC is the onlyway to make an exchange of power between the twonetworks possible. There are also HVDC linksbetween networks with different nominalfrequencies (50 and 60 Hz) in Japan and SouthAmerica.5) Controllability. One of the fundamental advantageswith HVDC is that it is very easy to control theactive power in the link6) Limit short circuit currents. A HVDC transmissiondoes not contribute to the short circuit current of theinterconnected AC system.7) Environment. Improved energy transmissionpossibilities contribute to a more efficient utilizationof existing power plants. The land coverage and theassociated right-of-way cost for a HVDC overheadtransmission line is not as high as for an AC line.This reduces the visual impact. It is also possible toincrease the power transmission capacity forexisting rights of way. There are, however, someenvironmental issues which must be considered forthe converter stations, such as: audible noise, visualimpact, electromagnetic compatibility and use ofground or sea return path in monopolar operation.In general, it can be said that a HVDC system ishighly compatible with any environment and can beintegrated into it without the need to compromise onany environmentally important issues of today.
What are hvdc links?
the link in hvdc system is a conductor joining rectifier and inverter in series connection.Answer'HVDC' stands for 'high-voltage, direct-current'. A HVDC link is widely-used for interconnecting independent high-voltage a.c. grid systems, such as UK/France. HVDC links eliminate synchronisation problems between the two a.c. grids.
Is it true that the current supply from electric power generating plants is an alternating current?
Yes, it is true that current supply from generating plants is an alternating current. There is no success found in bulk power generation of direct current ( D.C. ) in a power plant. But yes it is possible to transmit the power in the form of direct current ( High Voltage Direct Current Transmission-HVDC Transmission ) that possible after converting the generated alternating current into direct current with the help of high range converters.
Which transformer convert hvac to hvdc?
Decepticon
What is hvdc power transmission?
'HVDC' stands for high-voltage, direct current.
What are the various types of filters that are employed in HVDC converter station?
There are various types of filters that are employed in HVDC converter station. These include high-voltage direct current and terminal stations.
Why dc supply cannot be given to transmission lines?
We can use DC too for the transmission system. Refer HVDC transmission system.
HVDC transmission lines being used in Pakistan?
it will be implemented soon...planning is in progress
How do you transmit ac power flow in HVDC transmission line?
You don't! That's the whole point of a d.c. transmission line.
What is operation of HVDC system?
HVDC system is electric power transmission system to transmit bulk power over long distances with High DC voltage and current. The operation of HVDC system means the transmissing power from generating source to load destinaton.
Is there any need of transformers in HVDC transmission if yes then why it is needed and what is the working of it?
For DC transmission, power is transferred based on the difference in voltage between the sending and receiving end. Because of this, you need to be able to control the sending and receiving voltage. Moreover, HVDC are typically used to transport power long distances into separate AC power systems. Because of this the voltage control is typically accomplished by having an AC/DC converter, which includes specialized power transformers. These transformers are connected to create near DC voltages.
When was HVDC Moyle created?
HVDC Moyle was created in 2001.
Can two power systems having different voltages be synchronised?
yes. it is happen only for HVDC transmission .. but we can't set different voltage at A.C transmission system...
What is system of operation?
HVDC system is electric power transmission system to transmit bulk power over long distances with High DC voltage and current. The operation of HVDC system means the transmissing power from generating source to load destinaton.
When was HVDC Inter-Island created?
HVDC Inter-Island was created in 1965.
