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# OPTIMAL PLACEMENT AND SIZING OF CAPACITOR BANKS BASED ON VOLTAGE PROFILE AND LOSSES AND EFFECTS OF DG

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### OPTIMAL PLACEMENT AND SIZING OF CAPACITOR BANKS BASED ON VOLTAGE PROFILE AND LOSSES AND EFFECTS OF DG

1. 1. Optimal Placement and Sizing of Capacitor BanksBased on Voltage Profile and Losses in RadialDistribution System and Effects of DG AdditionByPrashanta Sarkar (11PEE010)M.Tech,Power SystemSupervisorsSaheli Ray & Dr. Subhadeep Bhattacharjee             DEPARTMENT OF ELECTRICAL ENGINEERINGNATIONAL INSTITUTE OF TECHNOLOGY AGARTALAMAY- 20131
2. 2. Outline of PresentationIntroduction.Test System.Problem formulation. Result and discussion. Conclusion. Future Scope.PublicationReferences.  2
3. 3.                IntroductionReactive power compensation.Optimal capacitor placement(OCP) using GACompensation using capacitor banks &….Distributed Generation(DG)3
5. 5. PROBLEM FORMULATION      Two goals for determining the formula that are used in point of start                                                                                                                           1. Loss Reductions.        2. Voltage profile Improvement.  The main constraints in the optimization process in the proposed methodology   are:        1. Loss with OCP ≤ Loss without OCP2. V bus min ≤ V bus ≤ V bus max5
6. 6. The objective function, with composing constraints and goals, is determined as   following:k1, k2 , k3 : Emphasis or penalty factorsn : Number of Buses        m : Number of Branches.( )11213110, % %0,,niwithOCP iwithoutOCPimjwithoutOCP jwithOCPjmjwithoutOCP jwithOCPjMaxF K Max Voltage VoltagenK Max P PK Max o Q Q===  = − +        − +   ÷         −   ÷     ∑∑∑6
7. 7. Optimal capacitor placement using GA in ETAP Simulating the system in ETAP 38 no. of capacitor can be placed for OCPMin voltage (%)Min voltage(%) before OCP Min voltage(%) after OCP93.01 96.41Max voltage (%)Max voltage(%) before OCP Max voltage(%) after OCP98.45 100.06Power losses in…….. KWPower losses in KW beforeOCPPower losses in KW afterOCP393 325Capacitor cost(\$)----------------- 1260000.00Cost of real power loss(\$)Cost of real power loss beforeOCPCost of real power loss afterOCP1205 1009Benefit(\$/year)Benefit(\$/year) after OCP Benefit(\$/year) after OCP----------------------- 118981.007
8. 8. Accumulative profit of the total planning period gives a profit of 1105820.00 \$.Voltage profile between optimal capacitor placements and uncompensated system8
9. 9. MANUAL PLACEMENT OF CAPACITORUrge for manual capacitor placementPlacing of 2 capacitor banks at bus no 10, 58 of 700,1400 KVAR rating9
10. 10. Placing of 3 capacitor banks at bus no 16, 52 & 58 of 650,800 & 600 KVARPlacing of 4 capacitor banks at bus no 10,16, 52 & 58 of 500,200,700 & 600KVAR10
11. 11. Placing of 5 capacitor banks at bus no 10,16, 47 ,52 & 58 of 550,100,550,450 & 300KVARVoltage profile between all the cases of capacitor banks placements and uncompensatedsystem11
12. 12. Comparison between multiple capacitor bank placements12Element2 capacitorbank3 capacitor bank 4 capacitor bank 5 capacitor bank UnCompensatedsystemMinvoltage (%)95.01 95.00 95.00 95.00 93.01Maxvoltage (%)98.87 98.85 98.85 98.84 98.45Active Powerlosses (KW)366 KW 367 KW 364 KW 364 KW 393 KWReactive Powerlosses (KVAR)754 KVAR 747 KVAR 743 KVAR 741 KVAR 806 KVAR
13. 13. COMPENSATION USING CAPACITOR BANKS & DGPlacing of 5 capacitor banks at bus no 10,16, 47 ,52 & 58 of 550,100,550,450 &300 KVAR & 3 DG at bus no. 21,42 & 56 of 0.5 MW Rating13
14. 14. Placing of 5 capacitor banks at bus no 10,16, 47 ,52 & 58 of550,100,550,450 & 300 KVAR & 3 DG at bus no. 21,42 & 56 of 1 MW14
15. 15. Voltage (%) profile improvement curve with DG rating 0.5 MW & 1 MW15
16. 16. Voltage & Power Loss comparisons with CapacitorBanks& DG16Element5 capacitor bank & 3DG of 0.5 MW rating5 capacitor bank & 3 DG of 1MW ratingMin voltage(%) 96.09 97.04Max voltage(%) 99.10 99.34Active Power losses (KW) 261 KW 197 KWReactive Power losses (KVAR) 570 KVAR 465 KVAR
17. 17. ConclusionThe study of OCP in 60 bus radial distribution system is helpfulin long term investment.Manual placement of capacitor may result lower investment .The compensation of reactive power is limited to someextent, but for good solution of optimization both active andreactive power compensation is essential.DG in the system may resolve many other issues (powerislanding, stability).17
18. 18. Future scopeImplementing a switching technology for exactcombination of DG and capacitor bank.Soft computing technique to determine DG & capacitor …ratings.Selection of DG technology.18
19. 19. PublicationPrashanta Sarkar, Soumesh Chatterjee, Saheli Ray, Optimal Placementof Capacitor for Voltage Support and Minimizing Overall Cost inRadial Distribution System, International Journal of Computer Applications(0975 – 8887) Volume 65– No.2, March 201319
20. 20. Reference [1] An Introduction to Reactive Power,The National Grid Company plc, Market,Development: October 2001,pp.1-3.[2] Pravin Chopade and Dr. Marwan Bikdash “Minimizing Cost and Power loss byOptimal Placement of Capacitor using ETAP”,978-1- 4244 - 9593-1, 2011 …IEEE,pp.24-29.[3] H. Omidi, B. Mozafari, A. Parastar, M.A. Khaburi, “Voltage Stability MarginImprovement using Shunt Capacitors and Active and Reactive PowerManagement”,978-1-4244-4509-7/09, pp 1 - 5.[4] Narain G. Hingoranl, Laszlo Gyugyi, Understanding Facts, 0-7803-3455-8,Chapter 5, pp.135-205.[5] Aoki k, Ichimori T, Kanezashi M. (1985), “Normal state optimal load allocation indistribution systems”, IEEE Trans Power Delivery, Volume 3(issue 1), pp. 147-155.[6] ETAP 7.0.0 Product Overview – Power System Enterprise Solution, OperationTechnology Inc. 20
21. 21. [7] Soumesh Chatterjee, Sharmistha Sharma, “Advantage of DG To Mitigate VoltageCollapse over Facts Devices”, International Journal of Engineering Research andApplications; Vol. 2, Issue6, November- December 2012, pp.1253-1257.[8] H. Lee Willis, “Analytical methods and rules of thumb for modeling DG-distribution interaction”, 0-7803-6420-1/00,IEEE,pp. 1643-1644.[9] IEEE Recommended Practices and Requirements for Harmonic Control inElectrical Power Systems , IEEE Std. 519-1992, 1993.[10] Y. Alinejad - Beromi, M. Sedighizadeh, M. R. Bayat and M. E. Khodayar,“Usinggenetic algoritm for distributed generation allocation to reduce losses and improvevoltage profile”, UPEC 2007 – 954.pp. 1-6.[11] R. Srinivasa Rao and S. V. L. Narasimham, “Optimal Capacitor Placement in aRadial Distribution System using Plant Growth Simulation Algorithm”,WorldAcademy of Science, Engineering and Technology 21 2008.pp 715-722.21
22. 22. [12] Gunnet Kour, Dr. G.S Brar & Dr. Jaswanti , “Optimal placement of static varcompensators in power system”, IJEST, vol. 4 No. 05 May 2012, pp. 2030-2036[13]Mohammad Hadi Molaei Ardakani, Mohammad Zarei Mahmud Abadi,Mohammad Hossein Zabihi Mahmud Abadi and Azim khodadadi,“DistributedGeneration and Capacitor Banks Placement in Order to Achieve the Optimal RealPower losses using GA”, IJCST Vol. 2, Issue 4, Oct . - Dec. 2011,pp. 400-404.[14] B.F. Wollenberg, “Transmission system reactive power compensation”, IEEEPower Engineering Society Winter Meeting, 27-31 Jan. 2002, vol.1, pp. 507 – 508.22
23. 23. Thank You23