Typicallayoutofasub station
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Transcript of Typicallayoutofasub station
What is a Sub-station?A substation is a part of an
electrical generation, transmission, and distribution system, where voltage is transformed from high to low, or low to high, or many other important functions. Electric power may flow through several substations between generating plant and consumer, and may be changed in voltage in several steps.
Mainly Sub-station is defined as “The assembly of apparatus used to same some characteristics (e.g. Voltage, AC to DC, P.F. , Frequency etc.) of electric supply is called Substation.”
Types of Sub-station Classified by their main two features.
According to constructional features:- Are of four type.
1. Indoor Sub-station 2. Outdoor Sub-station 3. Underground Sub-station 4. Pole-mounted Sub-station
According to service requirement features:- Are of six types.
Transformer Sub-station:- Divided into two different sub types:-
i. Transmission Sub-station ii. Distribution Sub-station
Switching Sub-stations Power factor correction Sub-station Frequency Changing Sub-station Converting Sub-station Industrial Sub-station
Design Considerations
Site Considerations:- Location place, Access road, present and future load center, existing and future sources of power etc.
Environmental Considerations:- Weather, Temperature, Wind, Appearance, Public Safety, Audible Noise, Electrostatic and Electromagnetic Effects, Effluent, Ice etc.
Components of a Substation Transformer:- Main
component. It is classified by two type.
Power Transformer:-
A power transformer is used in a substation to step up or step down the voltage
Instrument Transformer
i. Current Transformer
ii. Voltage Transformer
Sub-station Layout
A:Primary power lines' side 1.Primary power lines 2.Ground wire 3.Overhead lines 4.Transformer for
measurement of electric voltage
5.Disconnect switch 6.Circuit breaker
7.Current transformer 8.Lightning arrester
B: Secondary power lines' side
7.Current transformer
8.Lightning arrester
9.Main transformer
10.Control building 11.Security fence
12.Secondary power lines