Theoretical analysis

1. SMART GRID-SMART
TRANSFORMERS
Guided by, Presented by,
Smitha S.D Angel James
S7, EEE
Roll No: 7
1DEPARTMENT OF EEE, SAINTGITS

2. CONTENTS
•Introduction
•Smart Grid
•Comparison
•Components of Smart Grid
•Smart Transformer
•Ancillary services , devices & protection
•Results
•Merits and Demerits
•Application
•Conclusion
2DEPARTMENT OF EEE, SAINTGITS

3. INTRODUCTION
 Increase in power demand and the inefficiency of
the current distribution system paves way for Smart
grids.
 Power electronics & ICT are the proposed tools to
improve the reliability and stability of the system.
 A smart transformer is the most important
component in a smart grid.
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4. WHAT IS A SMART GRID?
 An electric grid that uses ICT and PE
 Uses smart devices and components.
 Two way interaction system.
 Relays information to central monitoring systems.
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5. COMPARISON.
EXISTING GRID
Electromechanical
One way communication
Few sensors
Manual monitoring
Manual restoration
Few customer choices
SMART GRID
oDigital
oTwo way communication
oSensors throughout
oSelf monitoring
oSelf healing
oMany customer choices
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6. COMPONENTS OF SMART GRID
 Smart transformer
 Smart meter,Smart power application
 Information transfer
 Distributed generation
 Power electronic devices and protection
 Current and voltage sensors
 Communication modems
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7. SMART POWER
APPLICATION
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8. DEPARTMENT OF EEE, SAINTGITS 8

9. THE SMART TRANSFORMER
AN SST WITH CONTROL & COMMUNICATION
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11.  Integral part of the smart grid
 Through a process known as voltage optimization, a
smart transformer provides the exact amount of
power that is needed, and responds instantly to
fluctuations within the power grid, acting as a voltage
regulator to ensure that the optimized voltage is
undisturbed.
 Reduce power consumption and provides stable and
optimal power supply(ideal voltages for devices
causing longer lifespan)
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SMART TRANSFORMER

12. SERVICES,DEVICES
&PROTECTION
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 Works with unit pf
 Harmonic compensation
 Avoid reverse power flow condition by frequency
control
 Offers services to LV ac/dc microgrid , MV grid(dc)

13. DEVICES and PROTECTION
 UPS
 Remote Terminal Unit
 Communication modem
 SC indicators
 Current and voltage sensors
 Remote operating mechanisms
 MV,DC/DC,LV converters
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15. STAGES
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17. STAGE ONE
 Three phase ac/dc rectifier regulates high voltage
dc bus
 It produce low distortion grid current
 DC voltage regulation
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18. STAGE 2
 Consists of DAB-dual active bridge-a high
frequency transformer
 DAB gives:
Electrical isolation
High reliability
Ease of realization
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19. STAGE 3
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 DC AC Converter is used to convert the DC voltage
into desirable ac voltage.
 Therefore an ST can achieve the voltage
transformation
by medium to high frequency isolation therefore to
potentially reduce the volume and weight of it
compared to the traditional transformer

20. RESULT
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21. MERITS
 SMART GRID IMPROVES EXISTING
ELECTRICAL INFRASTRUCTURE
 reliability, efficiency, economic
 distributed generation
 smart meters
• DEVELOPMENT OF NEW TECHNOLOGIES AND
MARKETS.
 household management
 power management app
 regenerative power
 power account
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22. DEMERITS
 ST has to compete with proven technology-the
traditional transformer in terms of
cost,efficiency,reliability.
 Need for active thermal control for semiconductor
devices
 Cannot be mass produced in the short term
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23. CONCLUSION
 The idea of smart grid technology was introduced
 The impact , benefits and challenges of using
smart transformer as the heart of smart grid was
discussed.
 The idea can be implemented only after the proper
plan and preparation to enable the hardwares and
services to aid the ST.
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24. REFERENCES
[1] THE SMART TRANSFORMER-impact on electric
and technology
challenges:MacroLiserre,Giampaolo Buticchi
-IEEE industrial electronics magazine.
[2] Designing Of A Smart Transformer- Gurjant
Singh, Dr. Inderpreet Kaur: International journal of
technology enhancements and emerging
engineering research, vol 3, issue 06 62 issn 2347-
4289
[3] Intelligent Transformer Substations for Future-
Proof Power Distribution-
www.siemens.com/transformersubstations
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