This presentation is made as a pre-thesis work on Smart Grid

1. Advanced Power Distribution System Configuration for
Smart Grid
Source: IEEE TRANSACTIONS ON SMART GRID, VOL. 4, NO. 1, MARCH 2013.
Seminar on EE 4130
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2. Outline of the talk
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Case studies & Result4
Introduction: Smart Grid & power distribution
31
Advanced Power Distribution Configuration
33
Conclusion
35
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Conventional Power Distribution Configuration

3.  Smart Grid An updated version of conventional power grid using information &
communication technology & an intelligent grid.
 Electricity distribution is the final stage in the delivery of electricity to end users.
Grid distribution systems:
 A radial system has only one power source for a group of customers. A power
failure, short-circuit, or a downed power line would interrupt power in the entire line
which must be fixed before power can be restored.
 A loop system, as the name implies, loops through the service area and returns to
the original point. The loop is usually tied into an alternate power source.
Introduction: Smart Grid & Power distribution
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4. Introduction: Smart Grid & Power distribution
Power distribution systems are radial in nature. In addition, given their relatively late
development, REGs were not considered in the design phase of current power
distribution systems. For these reasons, connecting distributed generation units to the
distribution system may cause various interconnection problems including
 harmonic concerns
 system overvoltage
 increased fault currents.
Talk of this Paper
 Upgrading of primary feeders from a radial to a loop configuration.
 An upgrading scheme of loop configuration using normally opened tie switches
and a tie switch selection algorithm for loss minimization.
 Integrate more REGs from the viewpoint of voltage regulation.
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5. In the conventional power distribution system, a service restoration scheme using
normally opened tie switches is useful for minimizing interruption time.
Conventional Power Distribution Configuration
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6. Advanced Power Distribution Configuration
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𝒉=𝟏
𝟐𝟒
𝑽𝒔𝒘_𝒏_𝒉
• By closing the opened tie switches, the radial distribution
configuration can be upgraded to a loop structure without
installing additional electric power lines.
• The optimum tie switches should be selected to maximize
the profits of ADPS upgrading for the loop structure.

7. Distribution system adopting Advanced distribution in KEPCO
Advanced Power Distribution Configuration
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8. Case studies & Results
• Study shows the losses accumulated during 24 h for each case. Upgrading
to case 3, in which the loss is reduced from 6.74 to 6.42 MWh, is the best
solution for loss minimization.
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9. Conclusion & Discussion
In this paper, the advantages of an APDS loop structure from the
perspective of loss reduction of an radial configuration have been
analyzed.
In addition, a loop path selection algorithm for loss minimization
have been developed.
The results of case studies using the test power distribution system can be concluded
as:
1)Appropriate upgrading of primary feeders from a radial to a loop configuration
reduces loss in the power distribution system.
2) The proposed loop path selection algorithm gives the best solution for loss
minimization using only a power flow analysis of the radial system. Coordination of
protection using communication technology may permit the upgrading of primary
feeders from radial to loop configurations.
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10. Thanks to all