Different Types of Overhead Conductor
In this post, we will explore about the different types of overhead conductors, like AAC, ACAR, ACSR and all aluminum alloy conductor (AAAC).
Power System
Protection against Traveling Waves
Travelling waves in power systems are high-frequency transient voltage or current surges that propagate along transmission lines and can cause significant damage to electrical equipment if not properly managed. These waves are often caused by lightning strikes, switching operations, or sudden faults. Effective protection against travelling waves involves several strategies and devices. Surge Arresters: Surge … Read more
Understanding the Surge Absorber
Surge absorbers are designed to absorb and dissipate the energy of the surge within the device itself, thereby protecting the equipment downstream. Construction: Surge absorbers typically use materials with nonlinear resistance characteristics, such as metal oxide varistors (MOVs). These materials have a high resistance at normal operating voltages but become highly conductive at higher voltages, … Read more
Different Types of Lightning Arresters
Types of lightning arresters : 1. Rod gap arrester 2. Horn gap arrester 3. Multigap arrester 4. Expulsion type lightning arrester 5. Valve type lightning arrester Rod Gap Arrester:- A Rod Gap Arrester is a simple type of diverter used in electrical systems to protect against high voltage surges, particularly those caused by lightning strikes. … Read more
How to Protect Transmission Lines and Substations from Direct Strokes:
Lightning Arrestors or Surge diverters: Surge diverters or Lightning arrestors function by providing a low-impedance path to ground for transient over voltages that exceed a certain threshold. When a surge occurs, such as from a lightning strike or switching operation, the surge diverter conducts the excess energy to ground, effectively diverting it away from sensitive … Read more
Lighting phenomena & overvoltage due to lightning
What are lighting phenomena? Lighting phenomena refer to the various occurrences related to lightning, which is a sudden electrostatic discharge that occurs during a thunderstorm. These phenomena can include: Lightning bolts: These are the most common form of lightning and are visible as a bright flash in the sky. Ball lightning: A rare and … Read more
Understanding the Causes of Overvoltage in Electrical Systems
A. Internal Causes:- Switching Surges: Switching surges occur when there is a sudden change in the electrical circuit, such as switching off a large load or opening/closing circuit breakers. Faults in the System: Faults such as short circuits or ground faults can cause overvoltage conditions by disrupting the normal flow of electricity in the system. … Read more
Kelvin's Law for Economic Choice of Conductor Size
Kelvin’s Law: The most economical size of a conductor for a transmission line is one where the annual interest and depreciation on the capital cost of the conductor are equal to the annual cost of energy loss due to the resistance of the conductor. Mathematically, this can be expressed as: Annual Cost of Energy Losses … Read more
Characteristics of High Voltage for Power Transmission Lines
Using high voltage for transmitting electricity has many important advantages. Characteristics of high voltage in power transmission lines include
Classification of Transmission Lines
1. Based on Voltage Levels: 2. Based on Current Type: 3. Based on Configuration: 4. Based on Length: