This thesis reviews the performance of hybrid grids that integrate distributed generation sources like solar and wind under various fault conditions. It explores microgrid operations in both grid-connected and island modes, highlighting advantages such as enhanced integration of renewable resources and improved power quality. Key challenges include coordination issues, voltage regulation, and potential high costs, with ongoing work focused on studying transient behaviors and fault responses using simulation tools.

1. 3/11/2014SMART GRID TECHNOLOGY DEPT.ECE SDMIT 1
REVIEW ON THE PERFORMANCE OF
HYBRID GRID UNDER DIFFERENT FAULT
CONDITIONS
Under the esteemed guidance of
Presented by:
14331D5603

2. CONTENTS
 Objective of the thesis
 Literature review
 Introduction
 Solar and wind energy
 Power quality issues
 Simulation and results
 Work done to be done
 conclusion

3. OBJECTIVE OF THE THESIS
 Grid integrated system
 study on Integration of DG’s
 Key challenges observed
 Modelling and study of hybrid systems under
different fault conditions
 Propose suitable methods to over come some
of these challenges

4. LITERATURE REVIEW
So far I have reviewed approx. 25 papers on micro grids
 [1] F Kanellos et aI., "Micro-grid Simulation during Grid-
connected and Islanded modes of Operation," The
International Conference on Power Systems Transients,
(IPST'05), Montereal, 19-23 June 2005, Paper No. IPST05-113..
 [2] Z. Chen and W. Kong, "Protection Coordination Based on
Multi Agent for Distribution Power System with
Distribution Generation Units," 2007, pp. 1-5.
 [3] T. Quoce et aI., "Dynamics Analysis of an Insulated
Distribution Network," IEEE Proceedings of Power System
Conference and Exposition, Vol. 2, 2004, pp.815-821.
 [4] C.L.T Borges, and D.M. Falcao, "Impact of
Distributed Generation Allocation and Sizing on Reliability,
Losses, and Voltage Profile", 2003 IEEE Bologna Power
Tech Conference Proceedings, Bologna, Volume 2, 23-26 June
2003

5. INTRODUCTION
 A MICROGRID is a group
of interconnected loads and
distributed energy resources
within clearly defined
electrical boundaries that acts
as a single controllable entity
with respect to the grid.
 If desired a microgrid can
connect and disconnect from
the grid to enable it to operate
in both grid-connected or
island-mode.

6. This analysis mainly
includes micro grid
operation under:
 Grid connected mode
 Islanded mode

7. MICROGRID OPERATING
MODES
 Island Mode:
3/19/2017 7
 Grid Connected Mode:

8. IMPORTANCE & BENEFITS
 It enables modernization
of the grids.
 It enhances the
integration of distributed
and renewable energy
resources to meets up
with the end user needs.
 It provides support and
backup for main grid.
 Smart control of energy
demand and increase
power quality.
 Reduce emitting green
house gaseous(GHG)

9. POWER QUALITY ISSUES IN
HDGS
SLIDE 15
9
VOLTAGE
REGULATION
DG
GROUNDIN
G ISSUE
HARMONIC
DISTORTION
ISLANDING
POWER
QUALITY
ISSUES
F

10. CHALLENGES IN HDGS
A risk of out-of-phase reconnection for synchronized
connection.
Coordination with load-shedding schemes
Voltage and frequency regulation
Load (phase) imbalance
Load and generation matching
Possible damage to equipment due to voltage and frequency
fluctuations.
lower capacity utilization factors.
high capital costs when compared to conventional power
systems.
Lack of operation and maintenance services providers is an
issue that needs attention.

11. WORK DONE SO FAR:
THE SIMULINK MODEL OF THE WIND GENERATION
BASED SYSTEM:

12. SIMULATION RESULTS

13. WORK TO BE
COMPLETED…
Transient behaviour of the
integrated hybrid grid system
powered by both wind and
photo voltaic generation under
normal grid connected mode
and islanding condition are to
be studied by using
PSCAD/EMTDC.

14. The obtained results will be analyzed
under different fault conditions to obtain a
solution for challenging issues like
harmonic distortions and frequency
variations.
CONCLUSION