Table of Contents
What is the difference between bundled and stranded conductors?
Composite conductors are typically stranded conductors. Composite conductors reduce proximity effect and also reduces skin effect up to certain extent. Bundled Conductors: Bundled conductors are employed in Extra High Voltage (EHV) transmission as at higher voltages corona effect is significant.
What is the use of bundled conductor?
Bundled conductor are those conductors which form from two or more stranded conductors, bundled together to get more current carrying capacity. By using bundle conductors instead of the single conductor in the transmission line increases the GMR of the conductors.
What is the advantage of high voltage transmission line?
The primary reason that power is transmitted at high voltages is to increase efficiency. As electricity is transmitted over long distances, there are inherent energy losses along the way. High voltage transmission minimizes the amount of power lost as electricity flows from one location to the next.
What is the advantage of transmitting electrical power at high voltage and Importance of 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. The power loss in the transmission line is be proportional to I^2.
What are the advantages and disadvantages of bundled conductors?
The most important advantage of bundled conductors is its ability to reduce Corona. When power is being transferred at very high voltages using a single conductor, the voltage gradient around it is pretty high, and there are high chances of formation of a corona, especially in bad weather conditions.
What is the advantage of a stranded conductor over a conductor?
Both the types of conductors are having specific advantages. Stranded conductors gives a high level of flexibility and high tensile strength. This helps in constructing distribution and transmission lines.
What is the distance between two conductors in a wire bundle?
The conductors of any one bundle are in parallel and charge per bundle is assumed to divide equally between the conductors of bundle. The composite or stranded conductors touch each other while the bundled conductors are away from each other. The typical distance is about 30 cm and more.
How does the bundle of conductors affect the inductance?
Bundling of conductors leads to reduction in line inductance. We know that inductance of a line is given by. Where, GMD = Geometric mean distance. GMR = Geometric mean radius. For a single conductor of radius r. GMR = 0.7788r. For two conductor bundle as shown in figure.