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Explore power transmission — components, line design, conductors, and techniques for efficient high-voltage energy transfer over long distances.
TACSR stands for “Thermal Resistant Aluminium Alloy Conductor Steel Reinforced”. It is a type of HTLS conductor. TACSR can carry higher current than conventional ACSR conductors. This is because its operating temperature is much higher than that of ACSR. However, it maintains similar mechanical practices with higher ampacity. Power utilities use TACSR mainly for uprating … Read more
The electricity demand increasing tremendously from last few decades. The increasing demand of lands and few government policies are the constraints in expanding transmission infrastructure. Hence there is no way other than increasing the ampacity of the existing transmission networks. This increases the need for High-Temperature Low-Sag (HTLS) conductors. Among the various HTLS conductors, INVAR … Read more
A Gap-type HTLS conductor is a special type HTLS conductor. It exhibits a separate high strength low elongation steel core surrounded by layers of thermal resistant aluminum alloy strands. The typicality of a gap type HTLS conductor is, it maintains a deliberate annular gap between the core and the first layer of aluminum alloy strands. … Read more
The full form of ACCC is Aluminium Conductor Composite Core. This is one of the most advanced HTLS technologies. Here, instead of a stranded steel core, we use a reinforced core made of carbon fiber. Sometimes, we also use glass fiber for reinforcement. Construction of ACCC The main advantage of ACCC among other HTLS conductors … Read more
Insulators Used in Overhead Transmission Lines In overhead transmission lines, insulators support the conductor on metallic tower structures. At the same time, they electrically isolate the high-voltage conductor from the metallic body of the supporting towers. In high-voltage overhead transmission lines, engineers typically install insulator strings at the tip of the cross arms of towers. … Read more
Before we discuss the use of disc insulators in high-voltage transmission lines, let’s understand the need for such insulators. Transmission lines operate at very high voltages such as 66 kV, 132 kV, 220kV, 400 kV, even 765 kV and more. So, the conductors used in these systems are also very heavy. To maintain proper ground clearance, we suspend these … Read more
Engineers prefer to use silicone rubber composite insulators for transmission lines in areas with high pollution levels. In other words, these areas are among the most heavily polluted. These insulators normally have a creepage distance of 31 mm/ kV. The disc insulators used in heavily polluted areas also have a creepage distance of 31 mm/kV. … Read more
Power stations generate electric power. Electrical power transmission lines transmit the generated power to far places. The resistance and reactance of the line cause a voltage drop in the power. The Voltage Regulation of Transmission Line is the change in voltage between the sending and receiving ends. What is Voltage Regulation? We express the Voltage … Read more
Skin effect is a phenomenon that occurs in conductors. It mainly occurs while a conductor carries alternating current. Actually, an alternating current always tries to flow through the outer layer of a conductor. As a result, the current distribution across the cross-section of the conductor becomes uneven. Alternating current flows through the conductor at 50 … Read more
The corona effect is a natural electrical phenomenon. It occurs on EHV and UHV transmission lines. It may also occur inside substations on the live parts of high-voltage equipment. Cause of the Corona Effect The voltage level of transmission lines and live equipment is very high in EHV systems. Therefore, the electric field intensity surrounding … Read more