High Voltage
Gas-Insulated Transmission Line (GIL) System Design
GIL systems are based on the successful SF6 tubular conductor technology, which has been around for several decades. GIL consist of a central aluminum conductor with a typical electrical cross… Read more
Oct 17, 2012 | By Edvard
High Voltage
Design of Overhead Transmission Line Foundation
The foundation is the name given to the system which transfers to the ground the various steady state (dead) and variable (live) loads developed by the transmission tower and conductors…. Read more
Sep 19, 2012 | By Edvard
High Voltage
Primary Distribution Voltage Levels
Most distribution voltages are between 4 and 35 kV. In this article, unless otherwise specified, voltages are given as line-to-line voltages; this follows normal industry practice, but it is sometimes… Read more
Aug 10, 2012 | By Edvard
High Voltage
The Structure Of Power System
An interconnected power system is a complex enterprise that may be subdivided into the following major subsystems: Generation Subsystem Transmission and Subtransmission Subsystem Distribution Subsystem Utilization Subsystem Generation subsystem includes… Read more
Aug 09, 2012 | By Edvard
Energy and Power
The main components of an oil circuit breaker and how does it interrupt the arc
They are simple in construction. The major parts of a minimum oil circuit breaker excluding the poles are the base frame,the drive which is constructed as a stored energy opening… Read more
Jul 24, 2012 | By Edvard
High Voltage
Shunt Reactor Used In HV and EHV Systems
Main Power System parameters are System Voltages and Frequency which normally indicate the healthiness level (they indicate the level of Generated active and reactive Powers against the load power requirement)…. Read more
Jul 17, 2012 | By Edvard
High Voltage
Autoreclosing in Transmission and Distribution Systems
Two main functions of Utility Electric System Operations department are Control and Protection. Control function deals with all operational aspects involved in efficient and optimal dispatching of available real power… Read more
Jul 15, 2012 | By Edvard
High Voltage
Transmission and Distibution Overhead Circuit Faults
Overhead (OH) Transmission circuits are usually HV level (110kV or 115kV and more) to EHV levels (230kV and beyond) and UHV levels (765kV and beyond). OH Distribution systems involve sub-transmission… Read more
Jul 11, 2012 | By Edvard
High Voltage
FACTS – Flexible AC Transmission Systems
The acronym FACTS stands for “flexible AC transmission systems”. These systems add some of the virtues of DC, i.e., phase independence and fast controllability, to AC transmission by means of… Read more
Jun 21, 2012 | By Edvard
Energy and Power
Circuit breakers classified by interrupting medium
A circuit breaker is defined as “a mechanical switching device capable of making, carrying and breaking currents under normal circuit conditions and also making, carrying and breaking for a specified… Read more
Jun 20, 2012 | By Edvard
High Voltage
Reducing Distribution Line Losses
One of the main benefits of applying capacitors is that they can reduce distribution line losses. Losses come from current through the resistance of conductors. Some of that current transmits… Read more
Jun 19, 2012 | By Edvard
Cables
Measurement of insulation resistance (IR)
The measurement of insulation resistance is a common routine test performed on all types of electrical wires and cables. As a production test, this test is often used as a… Read more
Apr 28, 2012 | By jiguparmar
Energy and Power
Single-Phase Power vs Three-Phase Power
The principal elements of an electric power system are the generating stations, the transmission lines, the substations, and the distribution networks. The generators produce the electricity, the transmission lines move… Read more
Apr 01, 2012 | By Edvard
High Voltage
Substation Main Functions and Classification
An electrical substation is an assemblage of electrical components including busbars, switchgear, power transformers, auxiliaries etc. These components are connected in a definite sequence such that a ckt. can be… Read more
Mar 29, 2012 | By Edvard
High Voltage
How HV transmission lines affects humans and plants?
By increasing population of the world, towns are expanding, many buildings construct near high voltage overhead power transmission lines. The increase of power demand has increased the need for transmitting… Read more
Mar 20, 2012 | By jiguparmar
