High Voltage
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
Energy and Power
Arrangements of LV Utility Distribution Networks (2)
Continued from the previous part: Arrangements of LV Utility Distribution Networks (1) In the past, an underground cable service or the wall-mounted insulated conductors from an overhead line service, invariably terminated… Read more
Dec 01, 2012 | By Edvard Csanyi
Energy and Power
Arrangements of LV Utility Distribution Networks
In European countries the standard 3-phase 4-wire distribution voltage level is 230/400 V. Many countries are currently converting their LV systems to the latest IEC standard of 230/400 V nominal… Read more
Nov 30, 2012 | By Edvard Csanyi
High Voltage
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
Transformers
Transformers Are Never Silent
Yes, we all know that transformers are never silent. This is actually quite impossible, but in an environmentally aware, highly regulated world, the issue is not the level of noise,… Read more
Oct 29, 2012 | By Edvard Csanyi
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 Csanyi
Protection
Overcurrent protection of transformer (NEC 450.3)
The overcurrent protection required for transformers is consider for Protection of Transformer only. Such overcurrent protection will not necessarily protect the primary or secondary conductors or equipment connected on the… Read more
Oct 08, 2012 | By jiguparmar
Power Substation
Designing of HV Power Substation and Layout
Introduction Earthing and Bonding Substation Earthing Calculation Methodology (Earthing Materials) Layout of Substation Different Layouts for Substations (single busbar, mesh, 1 1/2 cb) Principle of Substation Layouts (spatial separation, maintenance zones) Components of… Read more
Oct 01, 2012 | By sprabakar22
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 Csanyi
Transformers
Differences between Shunt Reactor and Power Transformer
Shunt Reactor and Transformer both appear similar in construction. Reactors are also often equipped with Fans for cooling similar to Power Transformers. However, there are major differences between the two…. Read more
Sep 18, 2012 | By Edvard Csanyi
Transmission and Distribution
Qatar General Electricity and Water Corporation – Recommendations for Safety Clearance
Service Vertical Clearance (Min) Water Line (to cross below EHV cable level) 0.5 Meter Sewerage Mains (to cross below EHV cable level) 1.0 Meter Drainage Mains (to cross below EHV… Read more
Sep 15, 2012 | By jiguparmar
Energy and Power
An Overview Of Smart Power Grid
The present electric grids use the technology of 1970’s. But with the advancement in various concepts of power generation, problems associated with power outages and thefts, and also due to… Read more
Aug 20, 2012 | By vinod ramireddy
Protection
Delayed Auto-Reclosing On EHV Systems
On highly interconnected transmission systems, where the loss of a single line is unlikely to cause two sections of the system to drift apart significantly and lose synchronism, delayed auto-reclosing can be employed…. Read more
Aug 11, 2012 | By Edvard Csanyi
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 Csanyi
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 Csanyi
