substation presentation

1. RADHA GOVIND GROUP OF INSTITUTIONS
MEERUT
A Seminar Report On
Substation
Submitted To Submitted By
Mr. Manoj Kumar Mohit Kumar
(Assistance Professor) B. Tech (EE 6th Sem)
Department Of Electrical Engineering

2. Table of Contents
 Introduction
 Power Generation And Transmission
 Single Line Diagram
 Elements
 Bus-Bar
 Lightening Arrester
 Transformer
 Instrumentation Transformer
1.Current Transformer(C.T.)
2.Potential Transformer(P.T.)
 Insulators
 Circuit Breaker

3. Introduction
 A substation is a part of an electrical
generation, transmission, and distribution system.
Substations transform voltage from high to low, or
perform any of several other important functions. Between
the generating station and consumer, electric power may
flow through several substations at different voltage levels.

4. Power Generation And Transmission
 Electric Power system-
1. Generating Stations
2. Transmission Systems
3. Receiving Stations
4. Distribution System
5. Load Points.

5. Single
line
diagram
of
Substatio
n

6. Elements of Substation
 Bus-Bar
 Instrument Transformer
1. Current Transformer
2. Potential Transformer
 Circuit Breaker
 Transformer
 Isolator
 Control and Relay Panel
 Lightning Arrester
 Protective Relay
 Insulators
 Fuse
 Control Room
 Panel Board
 Wave Trap
 Control Cable etc.

7. • Bus-Bar
A bus bar is a metallic strip or bar that conducts
electricity within a switch board, distribution board
and substation.

8. Transformer
 A transformer is an
electrical device that
transfers electrical
energy between two or
more circuits through
electromagnetic
induction.

9. • Instrumentation Transformer
Instrument transformer are high accuracy class
electrical devices used to isolate or transform voltage
or current levels.
Types of Instrumentation
transformer-
1.Current Transformer(C.T.)
2.Potential Transformer(P.T.)

10. 1.Current Transformer(C.T.)
 Uses of this transformer
1.Distance Protection
2.Backup Protection
3.Measurement
 This transformer Step down
the current form to 800 amp.
To 1 amp.

11. 2. Potential Transformer(P.T.)
 Main use of this transformer is to measure the
voltage through the bus.
 There are two main parts in-
1. Measurement
2.Protection

12. • INSULATORS
• Types of insulator
1.Pin type insulator
2.Suspension type insulator
3.Strain type insulator
4. Shackle insulator
5.Stay or Egg insulator

13. 1.Pin type insulator
 Pin type insulator is mounted on a pin on the
cross-arm on the pole. There is a groove on the
upper end of the insulator. In Electric power at
voltages up to 33 KV and Use of beyond operating
voltage of 33 KV.

14. 2.Suspension type insulator
 Use For voltages greater than 33 kV. Each unit or
disk is designed for low voltage , say 11 KV. In
obviously depend upon the working voltage.

15. Lightning Arrester
A Lightening arrester is a device used in electrical
power system to protect the insulation on the system
from the damaging effect of lightning.

16. Circuit Breaker
Electrical circuit breaker is a switching
device which can be operated manually as well as
automatically for controlling and protection of
electrical power system respectively.
Types of Circuit Breaker
I. Air Break Circuit Breaker
II. Oil Circuit Breaker
III. Vacuum Circuit Breaker

17. .