ELECTRODEZ

Notes on Power Supply Installation:

Notes on PSI is a write up that covers some of the basic points on Traction Substation and Traction Switching Stations. To view the same in PDF format click the link below : 

Notes on PSI.zip Notes on PSI.zip
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Type : zip

Showing category "Electrical Substation" (Show all posts)

Protective Relaying in a TSS

Posted by Anup Mohan on Tuesday, April 24, 2012, In : Electrical Substation 
What could possibly prevent the mishap that would happen if the live overhead catenary - contact system comes in contact system comes into contact with earth or train roof ?? This was asked by a fellow passenger of mine whilst my recent train journey. The simplest, yet convoluted answer is "Protective Relaying". 

A relay is the most important component in any protection system. During a fault or any abnormal conditions, one or more of the electrical quantities such as current, voltage, phase a...
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Power Factor and Capacitor Banks

Posted by Anup Mohan on Friday, March 9, 2012, In : Electrical Substation 
As a one liner, it can be said that the Shunt Capacitor banks (used with series reactors) serves the purpose of 'power factor correction'.

What is Power Factor:

When asked what is Power Factor (hereafter PF), the most likely answer that one would get in mind is Cos Φ.
 
Any equipment handles a job with some degree of efficiency. The quantification of this efficiency is termed to be "Power Factor". Equipment like induction motors, Transformers etc. require two types of power. One of them is the p...
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Earthing

Posted by Anup Mohan on Friday, November 4, 2011, In : Electrical Substation 
The Earthing of a system is designed with the primary focus being the safety and security of the system by ensuring that the potential on each conductor is restricted to such a value that it is consistent with the level of insulation applied. Most high voltage public supply systems are earthed. Unearthed overhead lines can be found but this may be small as 11kV derived from 33kV mains, where the capacity of earth current is of 4A.

An effective earthing system consists of earth electrodes, buri...
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Types of Substation

Posted by Anup Mohan on Monday, October 24, 2011, In : Electrical Substation 
Generally the substations may be categorized based on their end applications i.e. if their purpose is to aid transmission of electric power or if it is for the distribution of electric power etc. On this regard a substation may categorized into the following:

Transmission Substation:

The three phase power from the generating station leaves to a substation where its voltage is stepped up to extra high voltage level for the purpose of transmission. Typical transmission voltages are 110kV, 220kV, ...
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Electrical Substation and Power system

Posted by Anup Mohan on Sunday, October 23, 2011, In : Electrical Substation 
An electrical substation is the point in the electrical Transmission-Distribution system, where the transformation of voltage form high level to low level or the vice versa happens. The voltage is either stepped up or stepped down at a substation and this is done with the help of large power transformers within the substation.

A Transmission substation transforms the voltage to a level suitable for transporting the electric power over long distances. This is to minimize the capital and operati...
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