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Archive: Category «High Voltage»

High Voltage

Using HVDC Technology For Transmitting Electricity

An alternate means of transmitting electricity is to use high-voltage direct current (HVDC) technology. As the name implies, HVDC uses direct current to transmit power. Direct current facilities are connected… Read more

Mar 05, 2012 | By Edvard

Using HVDC Technology For Transmitting Electricity
High Voltage

Protection Of Generators And Transformers

As Generators and transformers are major components of a power system, so it is quite necessary to take all the preventive measures for the protection of transformers and generators. These… Read more

Feb 11, 2012 | By Bipul Raman

Protection of generators and transformers (Siprotec numerical protection relays)
High Voltage

Ceramic (Porcelain and Glass) Insulators

Porcelain is the most frequently used material for insulators. Insulators are made of wet, processed porcelain. The fundamental materials used are a mixture of feldspar (35%), china clay (28%), flint… Read more

Jan 27, 2012 | By Edvard

Porcelain insulators collection
Cables

EHV/HV Underground Cable Sheath Earthing (part 1/2)

In urban areas, high voltage underground cables are commonly used for the transmission and distribution of electricity. Such high voltage cables have metallic sheaths or screens surrounding the conductors, and/or… Read more

Jan 19, 2012 | By jiguparmar

21/35(40.5)KV 3-core XLPE/PVC/steel tape armor power cable
High Voltage

Segregated Phase Bus System

In this construction all the phases are housed in one metallic enclosure as earlier, but with a metallic barrier between each phase, as illustrated in Figure 1. The metallic barriers provide the required… Read more

Jan 18, 2012 | By Edvard

Segregated phase bus system
Energy and Power

Typical Constructions Of Overhead Lines

Along streets, alleys, through woods, and in backyards, many of the distribution lines that feed customers are overhead structures. Because overhead lines are exposed to trees and animals, to wind… Read more

Oct 03, 2011 | By Edvard

Example overhead distribution structures
Energy and Power

What is the Static Var Compensator (SVC)?

Static Var Compensator is “a shunt-connected static Var generator or absorber whose output is adjusted to exchange capacitive or inductive current so as to maintain or control specific parameters of… Read more

Sep 25, 2011 | By Edvard

The Siemens Static Var Compensator in the Radsted high-voltage switchgear station
Cables

Understanding Underground Electric Transmission Cables

Underground cables have different technical requirements than overhead lines and have different environmental impacts. Due to their different physical, environmental, and construction needs, underground transmission generally costs more and may… Read more

Sep 21, 2011 | By Bipul Raman

Underground XLPE cables left to right: 345 kV, 138 kV, 69 kV, and distribution
High Voltage

GIS vs AIS – Substation Earthing

Compressed SF6 gas used in MV and HV switchgears as an insulating medium has led to the development of compact gas-insulated substation (CIS) technology (figure 1). GIS , having many… Read more

Sep 12, 2011 | By Edvard

GIS vs AIS - Substation Earthing


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