13/11/2014SMART GRID TECHNOLOGY DEPT.ECE SDMIT

REVIEW ON THE PERFORMANCE OF HYBRID GRID UNDER DIFFERENT FAULT

CONDITIONS

Under the esteemed guidance of

Presented by:14331D5603

CONTENTSObjective of the thesisLiterature reviewIntroductionSolar and wind energyPower quality issuesSimulation and resultsWork done to be done conclusion

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

LITERATURE REVIEWSo 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

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.

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

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MICROGRID OPERATING MODES

Island Mode:

Grid Connected Mode:

IMPORTANCE & BENEFITSIt 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)

POWER QUALITY ISSUES IN HDGS

SLIDE 15

9

VOLTAGE REGULATION

DG GROUNDIN

G ISSUE

HARMONIC DISTORTION

ISLANDING POWER

QUALITY ISSUES

Fig.10. Islanding

CHALLENGES IN HDGSA risk of out-of-phase reconnection for synchronized

connection. Coordination with load-shedding schemesVoltage and frequency regulationLoad (phase) imbalanceLoad and generation matchingPossible 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.

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

SIMULATION RESULTS

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.

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

CONCLUSION