Hi friends, in this article, I am going to discuss about components of hvdc transmission system and types of hvdc transmission system. I hope you will find it useful and interesting. Transmission and distribution of electric power are done using alternating current, mainly due to economic reasons. However, due Read more…
As per present terminology, voltages less than 300 kV are termed as High Voltages. The voltages in the range of 300 kV to 765 kV are known as Extra High Voltages (EHV). The voltages which are 765 kV are termed as Ultra High Voltage (UHV). In India, transmission voltage ranges Read more…
Electrical cable classification can be done in two ways according to on the basis of insulating material used in their manufacture, on the basis of voltage for which they are manufactured. Electrical Cable Classification According to Voltage However, the method of electrical cable classification on the basis of voltage Read more…
Construction of 3 core underground cable is shown in Figure. The different parts of it are as under: Core or Conductors: A three core cable has three conductors as shown in Figure. These conductors are made of copper or aluminum and usually stranded to make the cable flexible. Read more…
The following connection schemes of distribution system are generally employed: Radial System In a radial system, separate feeders radiate from a single sub-station and feed the distributors at one end only. A single line diagram of a radial system for AC distribution is shown in the figure. Here Read more…
The distributors of AC and DC distribution system are generally classified as per the way they are being fed by the feeders. The main distributor types in power distribution system are as under: Distributor fed at one end. Distributor fed at both ends. Distributor fed at the center. Ring mains Read more…
The electrical energy generated at the power stations is conveyed to the consumers through a network of transmission and distribution systems. In the power system, the electrical energy generated at the power stations is conveyed to major sub-stations. From the major sub-stations, it is conveyed to the bulk power consumers Read more…
When an alternating potential difference is applied across two conductors whose spacing is large as compared to their diameters, then the atmospheric air surrounding the conductors is subjected to electrostatic stresses. At low p.d. between the conductors, there is no change in the condition of the air around the conductors. Read more…
When a transmission line supplies a load current, there is a voltage drop in the line due to resistance and inductance (inductive reactance) of line. Therefore, receiving end voltage VR is generally less than the sending end voltage VS. This voltage drop in the line is expressed as a Read more…
What is skin effect in transmission lines? A steady direct current flowing through the conductors is uniformly distributed over the whole cross-section of the conductor. However, an alternating current flowing through the conductor does not distribute uniformly, rather it tends to concentrate near the surface of the conductor as shown Read more…