Electrical Engineering (EE) Exam > Electrical Engineering (EE) Questions > HVDC transmission is preferred to EHV AC beca... Start Learning for Free
HVDC transmission is preferred to EHV AC because
- a)HVDC terminal equipment are inexpensive
- b)VAR compensation is not required in HVDC system
- c)system reliability can be improved
- d)harmonic problem is avoided
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
HVDC transmission is preferred to EHV AC becausea)HVDC terminal equipm...
HVDC transmission is more reliable than EHV AC because it uses ground or sea return and therefore, in case of fault on a line it can still be used to supply power with the help of healthy lines.
Most Upvoted Answer
HVDC transmission is preferred to EHV AC becausea)HVDC terminal equipm...
HVDC transmission is preferred to EHV AC because of a number of advantages that it offers. One of the key advantages is that system reliability can be improved with HVDC transmission. This is explained in detail below.
Advantages of HVDC Transmission
1. Improved System Reliability
HVDC transmission can improve system reliability by providing a more stable and controllable system. This is because HVDC transmission can be used to control and stabilize the power system under different operating conditions. For example, it can be used to control the power flow between two interconnected AC systems, to improve the stability of the power system.
2. Reduced Transmission Losses
HVDC transmission is also preferred because it can reduce transmission losses. This is because HVDC transmission uses high voltage and low current for the transmission of power, which leads to lower power losses due to resistance. This means that more power can be transmitted over longer distances with HVDC transmission than with EHV AC transmission.
3. Better Voltage Control
HVDC transmission also offers better voltage control than EHV AC transmission. This is because HVDC transmission can be used to control the power flow between two interconnected AC systems, which can help to stabilize the voltage levels in both systems.
4. Reduced Harmonic Distortion
Another advantage of HVDC transmission is that it can reduce harmonic distortion in the power system. This is because HVDC transmission uses a converter station to convert the AC power to DC power, which eliminates the need for filters to reduce harmonic distortion.
Conclusion
In conclusion, HVDC transmission is preferred over EHV AC transmission because it offers a number of advantages, including improved system reliability, reduced transmission losses, better voltage control, and reduced harmonic distortion. These advantages make HVDC transmission a more efficient and effective way of transmitting power over long distances.
Advantages of HVDC Transmission
1. Improved System Reliability
HVDC transmission can improve system reliability by providing a more stable and controllable system. This is because HVDC transmission can be used to control and stabilize the power system under different operating conditions. For example, it can be used to control the power flow between two interconnected AC systems, to improve the stability of the power system.
2. Reduced Transmission Losses
HVDC transmission is also preferred because it can reduce transmission losses. This is because HVDC transmission uses high voltage and low current for the transmission of power, which leads to lower power losses due to resistance. This means that more power can be transmitted over longer distances with HVDC transmission than with EHV AC transmission.
3. Better Voltage Control
HVDC transmission also offers better voltage control than EHV AC transmission. This is because HVDC transmission can be used to control the power flow between two interconnected AC systems, which can help to stabilize the voltage levels in both systems.
4. Reduced Harmonic Distortion
Another advantage of HVDC transmission is that it can reduce harmonic distortion in the power system. This is because HVDC transmission uses a converter station to convert the AC power to DC power, which eliminates the need for filters to reduce harmonic distortion.
Conclusion
In conclusion, HVDC transmission is preferred over EHV AC transmission because it offers a number of advantages, including improved system reliability, reduced transmission losses, better voltage control, and reduced harmonic distortion. These advantages make HVDC transmission a more efficient and effective way of transmitting power over long distances.
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