The Disadvantage of High Transmission Voltage:
| Sr. No. | The disadvantage of High Transmission Voltage |
|---|---|
| #1. | Insulator size increase |
| #2. | Switch Gear Cost increase |
| #3. | Transmission Tower Height Increase |
| #4. | Corona loss |
What are the advantages of higher voltages?
High voltage machineries have much reduced size and weight compared to same power low voltage counterpart. Reduced weight and space for machinery means increased space for cargo and more profit. Using electric propulsion further reduces engine room size, again more cargo space and profit.
What are the disadvantages of transmission at high voltages?
Disadvantages of High Voltage Transmission
- Corona loss is a big problem at higher voltages.
- It increases radio interference.
- The height of towers and insulation increases with increase in transmission voltage.
What are the advantage and disadvantages of using high voltage onboard the ship?
Working at high voltage significantly reduces the relative overall size and weight of electrical power equipment. – When large loads are connected to the LV system the magnitude of current flow becomes too large resulting in overheating due to high iron and copper losses.
What is an advantage of transmitting electricity at a high voltage?
The advantage of transmitting electricity at high voltage is that is minimizes the power loss due to resistance in conductors. Power is dissipated as heat. The relationship between power, current and resistance is P=I^2R.
What are the limitations of high voltage for transmission Mcq?
At higher voltage, volume of conductor is reduced. Area of conductor A ∝ 1/Vs² Where Vs = Supply voltage So that material requirement is reduced and hence cost of the material and transmission is reduced.
What is the advantage of using higher voltage as opposed to lower voltages when operating heavy electrical loads?
When designing electrical installations, increased voltage reduces current, which allows smaller conductors and protection devices.
What are the advantages and disadvantages of DC transmission over AC transmission?
A DC System has a less potential stress over AC system for same Voltage level. Therefore, a DC line requires less insulation. In DC System, there is no interference with other communication lines and systems. In DC Line, Corona losses are very low as compared to the AC transmission lines.
What are the advantages and disadvantages of HVDC system?
Fault clearance in HVDC is faster, therefore the DC transmission system possesses improved transient stability. Size of the conductor in DC transmission can be reduced as there is no skin effect. Cost is less as compared to the AC transmission. HVDC tower is less costly.
Which among the following is not an advantage of high voltage transmission?
Which one of the following is not an advantage of High voltage AC Power transmission: Decreases line drop. Increases transmission efficiency. Decreased corona.
What are the disadvantages of high voltage system on ships?
What are the disadvantages of high voltage system on ships ? Higher voltages means greater risk and hence require stringent safety procedures. Skilled labour required for handling high voltage system. Danger of arcing, chances of arc flash and arc blast.
What is the difference between high voltage and low voltage?
High voltage is more dangerous than low voltage because it carries a higher degree of voltage. High voltage is classified as having the potential to cause injury or harm. The high voltage generates more electrical arc in a possible arc fault and it is extremely dangerous for the people and the systems.
Why high voltage system is used onboard the vessel?
As the ship size increases, there is a need to install more powerful engines and other machineries. This increase in size of machineries and other equipment demands more electrical power and thus it is required to use higher voltages on board a ship.
What is the difference between high voltage and Extra High Voltage?
1-2020 defines high voltage as 115 kV to 230 kV, extra-high voltage as 345 kV to 765 kV, and ultra-high voltage as 1,100 kV.The definition of extra-high voltage (EHV) again depends on context. In electric power transmission engineering, EHV is classified as voltages in the range of 345,000– 765,000 V.
Which one of the following is a limitation of HVDC transmission Mcq?
Disadvantages of HVDC transmission: Converter substations are required at both the sending and the receiving end of the transmission lines, which result in increasing the cost. Inverter and rectifier terminals generate harmonics which is reduced using active filters which are also very expensive.
What is the main reason for using the high voltage for the long distance power transmission?
For constant electric power, higher the voltage, lower is the current (as P=IV) through the wire. As power loss due to Joule’s heating is proportional to I2, for a small current, power loss is also small. So, power is transmitted over long distances at high voltage to minimize power loses due to Joule’s heating.
What is the main reason for using the high voltage for the long distance power transmission *?
Advantage of High Voltage Transmission:
The load current is given as, From the above equation, we can say that if voltage increased then line loss will decrease and vice versa.
What happens if the voltage is too high?
Voltage that is too high can cause premature failure of electrical and electronic components (e.g. circuit boards) due to overheating. The damage caused by overheating is cumulative and irreversible.
Why does high voltage reduce current?
When voltage of a source is increased in a circuit then the current flowing in the circuit is reduced, because in a circuit for a constant power need the current flowing in the circuit is inversely proportional to the voltage applied in the circuit. so for constant power draw, power is constant.
How does high voltage affect the performance of an induction motor?
High voltage on a motor tends to push the magnetic portion of the motor into saturation. This causes the motor to draw excessive current in an effort to magnetize the iron beyond the point where magnetizing is practical. Motors will tolerate a certain change in voltage above the design voltage.
What are the advantages of AC and DC transmission?
Key Advantages of AC over DC
AC type can be transmitted employing a step-up form of transformers but direct current cannot be transmitted by this solution. The AC is simpler to produce than DC. It is also less expensive than DC to generate. The AC systems have higher efficiency than DC such as ac generators.
Contents