Hello, friends, I hope you all are doing great. In today’s tutorial, we will discuss the Difference Between AC & DC Transmission Line. for ac transmission there is a need of 3 wire that are live wire in some case four wires are used one is neutral and three are phases while dc transmission there is need of 2 conductive wires.
The transmission line is a system of conductive wires that used to transmit power from the generating end to the user end. A transmission lines whose length is eighty kilometers is called a short transmission line. The lines that have a length of eight to two hundred kilometers is known as a medium transmission line. While the lines that have a length larger than one fifty kilometers is called long transmissions. The elements of transmission lines are conductors, insulators, clamps, fuses, cross arms, etc. in today’s post, we will have a detailed look at both ac and DC transmission lines with the detailed and find their differences. So let’s get started with the Difference Between AC & DC Transmission Lines.
Difference Between AC & DC Transmission Line
AC Transmission Lines
- The lines that used for the transmission of AC is called AC transmission lines.
- In this transmission system, there is 3 conductors are used.
- This power transmission system consists of inductances and surges.
- The voltage drop during power transmission through this technique is large.
- The uses of breaker are less costly than dc breaker
- If a fault occurs at the powerhouse of ac easy to remove with less cost
- The value of voltage can be changed through the transformer
- In this transmission, there is also skin effect.
- This transmission technique required high insulation.
- The dia of the conductor used is larger so it is expensive system than dc
- The AC transmission also has interference.
- There is an occurrence of corona loss in this transmission system.
- Reactive power creates different issues in this system
- inductance also creates problems in this system
- There is also a dielectric loss that occurs in ac power transmission.
DC Transmission
- The system that transmits DC is called the dc transmission system.
- In this system there are 2 conductors are used.
- During this transmission, less voltage loss occurs.
- This system has not surged issues like AC
- it does not have inductance so losses are less
- It does not have signal interference among different communication system
- In this system, there is no existence of skin effect.
- This system required less insulation than the ac system.
- Zero value of dielectric losses
- This system is expensive the dc
- The expense of this system is less than the AC transmission.
- The conductor used in this system has a larger length than the AC transmission.
- If a fault occurs in this system it solution is costly and difficult.
- In this system, there is no use of transformers.
- In this technique, there is the existence of the corona effect.
AC Transmission System vs DC Transmission System
AC Transmission System
- The power system uses AC for the transmission of power called ac transmission system
- They have a complicated design.
- It provides high voltage.
- It uses 3 conductors for three phases.
- For increasing or reducing voltage level transformer is used.
- A larger number of conductors needed more insulation
- It has inductance, capacitance, and phase displacement
- Capacitance causes power losses.
- Due to inductance high losses occur and produce low voltage regulation
- It has skin effect and corona effect
- The main components of this type of power transmission are conductors, insulators, and transformer
- Its repair process is easy and needs low-cost maintenance.
- It also has dielectric losses.
DC Transmission System
- This power system carries a DC supply to load.
- It has a complex design.
- Commutation issues cause not to generate high voltage for DC transmission.
- It has 2 conductors live and neutral
- It needed less insulation due to two conductors.
- It does not face inductance, capacitance, and phase displacement problems.
- Since not have capacitance and no losses
- It does not have a skin effect but has a corona effect.
- It has good voltage regulation due to the absence of inductance.
- Rectifiers, conductors, insulators, and inverters are main components of DC transmission
- It delivers power to longer distances but has a complex repair process.
- It does not have dielectric losses.
Disadvantages of DC Transmission
- It does not produce high voltage due to commutation.
- It does not have step-up features of DC voltage since not use a transformer like an AC system.
- It has limitations of circuit breakers and DC switches.
- The generator is used for reducing voltage level that has lower efficiency than a transformer.
- It is a complex design and has a higher cost than an AC system
- DC voltage level does not change easily so do not get 5 Volts, 9 Volts 15 Volts, etc lines.
Read also
- Difference Between AC and DC Motor
- Difference Between Alternating Current (AC) and Direct Current (DC)
- Linear Dc Machine Working, Construction And Application
That is a detailed post about Difference Between AC & DC Transmission Line if you have any queries ask in comments. Thanks for reading. Have a good day.