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There are losses in d.c. transmission lines, due to their resistance. But there are no reactive losses. So, d.c. transmission lines have less losses in comparison to an equivalent a.c. transmission line.
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What is DC transmission?
D.C. high-voltage transmission is used over long distances as they have less losses (e.g. undersea cables, because of the proximity of the individual cores have high capacitive losses with a.c.), and there are no frequency synchronisation problems when these are used as d.c. 'links' between countries (e.g. UK/France).
What is the condition for maximum efficiency of a DC machine?
The condition for maximum efficiency of a d.c. machine is that VARIABLE LOSSES must be equal to CONSTANT LOSSES i.e., variable losses = constant losses..
Does any country use DC?
No country distributes electrical energy to homes or industry as d.c., but many country use high-voltage d.c. transmission systems -particularly for long-distance transmission (lower losses than a.c.), or for interconnecting independent grid systems (no synchronisation problems), or for undersea cables (no reactive currents),
Why iron loss cald constant power loss?
How to calculate iron losses in dc machine
Why are transmission voltages in multiples of 11?
Transmission voltages are in multiples of 11 to allow for 10% transmission line losses. Therefore, to obtain 100% efficiency, voltages in multiples of 11 are transmitted.
Who is better ac or DC transmission?
ac transmission is better. because it is cheaper as converter are not use.but losses are more as comparison to dc.
Why is not impractical to power distribution in power DC?
IN DC FOR LOW VOLTAGE HIGH DENSITY OF CURRENT WILL BE THERE SO WE CAN NOT USE THIS FOR BEST PRACTICE FOR TRANSMISSION & ALSO BECOS OF HIGH CURRENT TRANSMISSION LOSSES ARE VERY HIGH ( I2XR) LOSSES, TRANSMISSIN EQUIPMENT FOR DC ARE HIGH COSTIN DC FOR LOW VOLTAGE HIGH DENSITY OF CURRENT WILL BE THERE SO WE CAN NOT USE THIS FOR BEST PRACTICE FOR TRANSMISSION & ALSO BECOS OF HIGH CURRENT TRANSMISSION LOSSES ARE VERY HIGH ( I2XR) LOSSES, TRANSMISSIN EQUIPMENT FOR DC ARE HIGH COSTAnswerThe main reason is that we cannot use transformers to easily and efficiently change the magnitude of DC voltages, and the ability to change voltages is essential for electricity distribution. However, having said that, very high-voltage transmission over exceptionally long distances is often done using DC. This is because DC losses are far lower than AC losses.
Which power transmission is best ac or dc?
yes, i think dc transmission is best, coz in dc losses is low, no iductance between conduct, less corona loss.AnswerNeither is 'better'; they each have advantages and disadvantages. For example, although there might be less losses with d.c. transmission, the equipment required to raise and reduce the voltage at each end of the line is more costly than for an a.c. transmission system.
Where would DC be used instead of AC?
DC is used for extra-high voltage transmission systems, as there are less losses with DC than with AC, and no synchronising problems.
Why you use ac current of home instead of dc?
alternating current is generally instantaneous in nature and even in transmission lines it is easy to transmit with less losses when compared to dc as because it possess frequency where as dc do not have
Do you get DC current directly from the transmission line?
Only if it is a DC transmission line.
What are the advantages of powering a city with ac rather than dc?
There are actually several downsides to AC rather than DC, but there's one overwhelming advantage that means we use it anyway: transmission losses are lower.
Why dc supply cannot be given to transmission lines?
We can use DC too for the transmission system. Refer HVDC transmission system.
What is DC transmission?
D.C. high-voltage transmission is used over long distances as they have less losses (e.g. undersea cables, because of the proximity of the individual cores have high capacitive losses with a.c.), and there are no frequency synchronisation problems when these are used as d.c. 'links' between countries (e.g. UK/France).
What are the applications of losses in transmission line?
There are no applications for losses, that's why they are called 'losses'!
What are the disadvantages of the dc?
Transformers don't work on DC. If the voltage supplied isn't the one you want, it can be difficult. If you want a negative earth, and someone else in the house wants a positive earth, you have problems. Transmission of DC over large distances has problems (to get low currents to ensure low transmission power losses you would have to convert to AC, then transform to high voltage then finally convert back). In fact in all cases the easiest solution is to convert your DC to AC, make your conversion, and then reconvert to DC. Very messy.
Why does a 2003 impala transmission loses power?
TRANSMISSION LINE LOSSES
