Methods of Controlling Lightning Overvoltages in HV
For well shielded transmission lines, the backflashover condition, close to the substation, is of prime concern for determining the location and number of surge arresters required to achieve insulation coordination… Read more
Dec 08, 2012 | By Edvard Csanyi
HV Instrument Current Transformers in T&D
Electrical measurements on a high-voltage transmission and distribution systems cannot be made practically or safely with direct contact to the power carrying conductors. Instead, the voltages and currents must be… Read more
Nov 23, 2012 | By Edvard Csanyi
The Purpose of High Voltage Circuit Switchers
Circuit switchers have been developed to overcome some of the limitations of fusing for substation power transformers. Circuit switchers have SF6 gas interrupters and are designed to provide three-phase interruption… Read more
Nov 16, 2012 | By Edvard Csanyi
Electrical Safety Standards for LV/MV/HV (Part-3)
Continued from part 2 – Electrical Safety Standards for LV/MV/HV (Part-2) Standard: Northern Ireland Electricity (NIE), 6/025 ENA Code: Indian Electricity Rules / Central Electricity Authority Right of Way Clearance… Read more
Nov 14, 2012 | By jiguparmar
Electrical Safety Standards for LV/MV/HV (Part-2)
Continued from part 1 – Electrical Safety Standards for LV/MV/HV (Part-1) Standard: Northern Ireland Electricity (NIE), 6/025 ENA Clearances of Electrical Line to Ground and Roads Clearances of Electrical Line… Read more
Nov 12, 2012 | By jiguparmar
Electrical Safety Standards for LV/MV/HV (Part-1)
Standard: Western Power Company Water Safely Clearance on Electrical Fires Minimum Approach Distance for Authorized Person Minimum Approach Distance for Ordinary Person Minimum Approach Distance for Vehicle and Plant for… Read more
Nov 07, 2012 | By jiguparmar
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 Csanyi
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 Csanyi
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 Csanyi
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 Csanyi
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 Csanyi
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 Csanyi
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 Csanyi
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 Csanyi
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 Csanyi