Give an advantage and disadvantages of (1) AC (2) DC.
Answers
Explanation:
1) There is no inductance, capacitance, phase displacement and surge problem in DC transmission. 2) Due to the absence of inductance, the voltage drop in DC transmission is less than the AC transmission for the same load and receiving end voltage. Because of this DC transmission has better voltage regulation.
OR,
1) amount of conductor requireed will be less , i.e in AC system we use 3 or 4 wire system but I DC systemthe no.of conductor straight reduces to 2.
2) We all know one thing that DC have zero frequency( f=0 hz) so, the major problem is solved here only .ie. harmonics problem (3rd harmonics or odd harmonics which is very dangereous to the poswer system)
3) Another is low impedance we know that in DC there is no XL and no XC so inductance is 0 (X=0) and impedance becomes (Z= R+jX) i.e (Z=R), wher as in AC this is not happening.
4) No skin effect (" hope u know what is skin effect in short-- in case of DC the current flows through the core of the conductor but in AC the current flows through the surface of the conductor due to which resistance incerases (how ??) its simple becoz at core the are is more so R is less & at the surface area is less so R is more).
5) No corona loss & hence no Interference.
6) As no frequency, no inductance, less wire, no corona, no interference due to which the system becomes very stable and smooth in operation and high quality can be gurrented
Now lets Talk about the advantages of AC over DC :-
Thomos Edision(invented & businessed DC) was scared of Nikola Tesla( invented AC) because of the following reasons they are:
1) electrical power generated in dc form cannot be increased to higher values, which adds a limitation towards the use of high power conversion.
2) Transformers cannot be used as we know very well why in case of DC. Hence we cannot step up or step down thw power as and when required by us.
3) Cost incerases due to additions of inverters and converters, and this also adds up to harmonics both at the load and source side.
4) So far I have experienced also that Dc also adds limitation to the use of switches and breakers used in th system.
most important please do remember that
"DC become advantages only for long power transmission( transmission line more than 650Km) , bulk power transmission and also if the power is transmitted for longer duration". otherwise today India would have purchased power from Pakistan but it is not because of only one reason the power transmission line conected between this two countries then only for certain months that tranmission line would be active {i.e in the months when Pakistan produces enough power) and for the rest of the months when power production is less in pakistan the line would be inactive which would be a big loss to India. (becoz I said DC is advantages when the system is made for longer duration, bulk power and long distance transmission only).
I hope helpful for you please mark as a brainlist answer and follow me
1st I will write about advantages of DC over AC tranimission:
1) amount of conductor requireed will be less , i.e in AC system we use 3 or 4 wire system but I DC systemthe no.of conductor straight reduces to 2.
2) We all know one thing that DC have zero frequency( f=0 hz) so, the major problem is solved here only .ie. harmonics problem (3rd harmonics or odd harmonics which is very dangereous to the poswer system)
3) Another is low impedance we know that in DC there is no XL and no XC so inductance is 0 (X=0) and impedance becomes (Z= R+jX) i.e (Z=R), wher as in AC this is not happening.
4) No skin effect (" hope u know what is skin effect in short-- in case of DC the current flows through the core of the conductor but in AC the current flows through the surface of the conductor due to which resistance incerases (how ??) its simple becoz at core the are is more so R is less & at the surface area is less so R is more).
5) No corona loss & hence no Interference.
6) As no frequency, no inductance, less wire, no corona, no interference due to which the system becomes very stable and smooth in operation and high quality can be gurrented
Now lets Talk about the advantages of AC over DC :-
Thomos Edision(invented & businessed DC) was scared of Nikola Tesla( invented AC) because of the following reasons they are:
1) electrical power generated in dc form cannot be increased to higher values, which adds a limitation towards the use of high power conversion.
2) Transformers cannot be used as we know very well why in case of DC. Hence we cannot step up or step down thw power as and when required by us.
3) Cost incerases due to additions of inverters and converters, and this also adds up to harmonics both at the load and source side.
4) So far I have experienced also that Dc also adds limitation to the use of switches and breakers used in th system.
most important please do remember that
"DC become advantages only for long power transmission( transmission line more than 650Km) , bulk power transmission and also if the power is transmitted for longer duration". otherwise today India would have purchased power from Pakistan but it is not because of only one reason the power transmission line conected between this two countries then only for certain months that tranmission line would be active {i.e in the months when Pakistan produces enough power) and for the rest of the months when power production is less in pakistan the line would be inactive which would be a big loss to India. (becoz I said DC is advantages when the system is made for longer duration, bulk power and long distance transmission only)