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1. Under the Esteemed Guidance of
Sri. K. Hari Krishna, M.Tech.,(Ph.D)
Associate Professor
KHIT
“
An Auto ground System for
Anti-Islanding Protection of
Distributed Generation”
Presented by:-
Y.Ganesh –128X5A0204
Ch.Ganeswar Kumar – 108X1A0206
T.Jagadeesh Babu –128X5A0203

2. CONTENTS
1.Abstract
2. Existing method
3.Proposed method
4.Control circuit
5. Experimental results
6.Advantages & applications
7. Conclusion

3. ABSTRACT
 Distributed Generation
 Anti-Islanding
 Auto ground system

4. Existing method:
In this existing method fact a variant on
communication based approaches,
whereby using thyristor valves connected to ground,
whereas its absence is indicative of an islanded grid .
have also suggested these thyristor based devices for
fault identification .
Similar to active islanding techniques, this approach
could be criticized alone on the impact on power
quality.
Additionally, in noisy grids or feeders that are
particularly long, the issue of nuisance tripping is an
issue.

5. Proposed method:
In this proposed method anti-islanding
protection that is based on applying a three-phase
short circuit to the islanded distribution system just
prior to reclosing or re-energization.
A prototype system was constructed using standard
distribution apparatus and a recloser controller, and it
was tested on the utility’s distribution test line.
Results show that the anti-islanding detection time is
approximately a cycle longer than the delay
associated with application of the auto ground..

6. Control Circuit:

7. Description of Auto ground System:

8. Comparison:

9. Distribution Apparatus:

11. Advantages:
•Cost is very low
•flexible operation
•high compactness
•high reliability.
•Efficiency is high
Applications:
•Distribution systems
•Industrial applications
•Substations