The document is a presentation on electrical substations submitted for academic purposes, covering their definitions, importance, and various classifications. It outlines factors for site selection, key elements, operations, hazards, and examples of recent accidents in Bangladesh. Emphasis is placed on safety measures and the need for proper maintenance and training.

1. PRESENTATION ON Electrical SUBSTATION
or
BRIEF DESCRIPTION OF SUBSTATION

2. SUBMITTED TO
Mr. Shaikh Rashedur Rahman
Assistant Professor, EEE at
University of Asia Pacific
SUBMITTED BY
Group:09
Md. Mohidul Islam
(18208028)
Md. Nadim-Al-Tanvir Kabir
(18208029)

3. Objective
➢Able to describe Substation.
➢Importance of substation.
➢Factors governing the selection of side.
➢Classification of Sub-Station.
➢Elements of a substation.
➢Operation of substation.
➢Hazards & safety.
➢Recent substation accident Bangladesh.

4. Introduction

5. Definition
• A substation is a part of an electrical generation, transmission, and
distribution system. Substations transform voltage from high to low, or
the reverse, or perform any of several other important functions.

6. Importance of substation

7. Factors governing the selection of side
I. Frist you have choose a good place.
II. Its safety must be ensured - good maintenance arrangements,
replacement of any parts with problems, regular monitoring and
testing as per standards, safe from fire related problems and related
matters must be ensured.
III. It should be easy to operate and maintain and minimum cost should
be monitored.

8. Classification of Sub-Station
1. Service requirement.
2. On structural features.

9. 1. Service requirement
Here the work is done mainly on voltage level more or less (step up and down),
power factor improvement, conversion from AC power to DC power.
➢Transformer substation.
➢Switching substation.
➢Power factor correction substation.
➢Converting substation.
➢Industrial substation.
➢Frequency changer substation.

10. Service requirement Classification
Transformer substation Switching substation Power factor correction substation
Converting substation Industrial substation Frequency changer substation

11. 2. On structural features
A substation has may components which must be properly protected for
continuous and reliable service.
➢Indoor substation.
➢Outdoor substation.
➢Underground substation.
➢Pole mounted substation.

12. On structural features Classification
Indoor substation Outdoor substation
Underground substation Pole mounted substation

13. Elements of a substation
➢ Busbar
➢ ACR (Automatic Re-closer)
➢ Isolator
➢ PT (Potential Transformer)
➢ CT (Current Transformer)
➢ VCB (Vacuum Circuit Breaker)
➢ Transformer
➢ Insulator
➢ Lightning Arrester
➢ PFI (Power Factor Improvement)

14. Elements of a substation
Busbar ACR (Automatic Re-closer) Isolator

15. Elements of a substation
PT (Potential Transformer)
CT (Current Transformer)
VCB (Vacuum Circuit Breaker)

16. Elements of a substation
Transformer Insulator Lightning Arrester
PFI (Power Factor Improvement)

17. Other elements of a substation
•Operation of substation
• Substations transform voltage from high to low, or the reverse, 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.

18. Symbols for Equipment in substations

19. Symbols for Equipment in substations

20. Hazards
➢Electrical hazards.
➢Mechanical hazards.
➢Hazards from toxic materials.
➢Dealing with fire hazards.
➢Hot surfaces/liquids/gases.
➢Handling of cold liquids.
➢Handling of corrosive liquids.
➢Handling of explosive gases.
➢Temperature hazards.

21. Recent substation accident Bangladesh

22. Recent substation accident Bangladesh

23. Summary of safety measures
❑Safe design/installation of plant and equipment.
❑Safe operation and maintenance practices.
❑Appropriate knowledge on the part of workers
-Training.
-Certification.
❑Warning signs at points of hazard.
❑Use of equipment/sensors to warn incipient problems
❑Proper periodic inspection and prompt repairs.

24. Conclusion
•