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  • 1. International Journal of Electrical Engineering and Technology (IJEET), ISSN 0976 – 6545(Print), ISSN 0976 – 6553(Online) Volume 5, Issue 6, June (2014), pp. 35-43 © IAEME 35 FAULT STABILITY ANALYSIS OF PMSG BASED WIND TURBINES THROUGH ENHANCED CONTROL STRATEGY Anas Abdulqader khalaf Research scholar, Department of Electrical Engineering Bharati Vidyapeeth Deemed University College of Engineering Pune Prof. P.D.Bharadwaj Assistance Professor, Department of Electrical Engineering Bharati Vidyapeeth Deemed University College of Engineering Pune ABSTRACT Stations that run on electric power production of energies employer is wind power - as technology be a healthy environment disbursement of oil may be non-existent and more dynamic and depend on the nature and especially the movement of wind and the cost of a simple piece increased interest by the consumer - and one of the types of engines that are used by engine wind PMSG is a device fluctuates according to the volatility of the atmosphere, especially wind speed and electric power unsteady be important in the network to produce electric power by the movement and direction of the wind - is important to intervene network with wind power inverter where - there are good things and some not so good use generators variable interval and speed - and a magnet permanently be mostly from based on wind generator to change load WECS bearing on the conditions of network variable - in technology generator has the ability to turn side to reduce the oscillations obtained from the train engine and is controlled by the part of the network by controlling - and there are laws that bind b laws that serve the network control - and works to reduce to some extent the changes that occur in the network and with the mistakes that may occur on the side of the network - in some generators often, reduce current by converting automatically by the generator and keep any effort strategy compared to Alternative Carriers Dc chopper. Index Terms: DC CHOPPER, DC LINK, PMSG, WECS. INTERNATIONAL JOURNAL OF ELECTRICAL ENGINEERING & TECHNOLOGY (IJEET) ISSN 0976 – 6545(Print) ISSN 0976 – 6553(Online) Volume 5, Issue 6, June (2014), pp. 35-43 © IAEME: www.iaeme.com/ijeet.asp Journal Impact Factor (2014): 6.8310 (Calculated by GISI) www.jifactor.com IJEET © I A E M E
  • 2. International Journal of Electrical Engineering and Technology (IJEET), ISSN 0976 – 6545(Print), ISSN 0976 – 6553(Online) Volume 5, Issue 6, June (2014), pp. 35-43 © IAEME 36 II. LITERATURE SURVEY There is a strong need for the suggested control strategy to improve the stability of a well, such as easing restrictions effort, and control the current rise and oscillation damping force. Next to the good monitor strategies, DC chopper plays a vital role in keeping the DC link voltage across the capacitor on going. suggested control strategy helps to regulate current deformations when an error occurs asymmetric grid and system parameters is also independent and simple to implement, which that makes them attractive to the practice of engineering. However, such a strategy to respond to the variables of sacrifice on the part of the generator and lead to a fluctuation, DC link voltage. It is believed that big DC link capacitor can be helpful for improving the performance of the system in the case of the use of the proposed strategy. Design of the Generator-Side Converter, the Grid-Side Converter and BMSG BASED WECS. Fig. 1: PMSG BASED WECS WITH DC CHOPPER. Fig.2: PMSG BASED WECS WITH OUT DC CHOPPER
  • 3. International Journal of Electrical Engineering and Technology (IJEET), ISSN 0976 – 6545(Print), ISSN 0976 – 6553(Online) Volume 5, Issue 6, June (2014), pp. 35-43 © IAEME 37 SIMULATION RESULTS WITH PROPOSED CONTROL SCHEME WITHOUT & WITH CHOPPER 1) Operation with Symmetrical Grid Faults. a)Operation with three phase to ground near Grid Faults. 2) Operation with Unsymmetrical Grid Faults: a) Operation with Single phase to ground near Grid Faults b) Operation with Dual phase to ground near Grid Faults 1) Operation with Symmetrical Grid Faults a) Operation with three phase to ground near Grid Faults. Without CHOPPER With CHOPPER Fig.3: generator parameters like speed, torque and current output waveforms without and with chopper circuit Without CHOPPER With CHOPPER Fig.4: DC capacitor voltage waveforms without and with chopper circuit
  • 4. International Journal of Electrical Engineering and Technology (IJEET), ISSN 0976 – 6545(Print), ISSN 0976 – 6553(Online) Volume 5, Issue 6, June (2014), pp. 35-43 © IAEME 38 Without CHOPPER With CHOPPER Fig.5: stator three phase voltage & current output waveforms without and with chopper circuit Fig.6: stator three phase voltage & current output waveforms without and with chopper circuit 2) Operation With Unsymmetrical Grid Faults a) Operation with Single phase to ground near Grid Faults Without CHOPPER With CHOPPER Fig.7: generator parameters like speed, torque and current output waveforms without and with chopper circuit
  • 5. International Journal of Electrical Engineering and Technology (IJEET), ISSN 0976 – 6545(Print), ISSN 0976 – 6553(Online) Volume 5, Issue 6, June (2014), pp. 35-43 © IAEME 39 Fig 8: Mechanical torque output waveforms without and with chopper circuit Without dc chopper With dc chopper Fig.9: DC capacitor voltage waveforms without and with chopper circuit Without CHOPPER With dc chopper Fig.10: stator three phase voltage & current output waveforms without and with chopper circuit
  • 6. International Journal of Electrical Engineering and Technology (IJEET), ISSN 0976 – 6545(Print), ISSN 0976 – 6553(Online) Volume 5, Issue 6, June (2014), pp. 35-43 © IAEME 40 Without CHOPPER With dc chopper Fig.11: Grid terminal three phase voltage & current output waveforms without and with chopper circuit b) Operation with Dual phase to ground near Grid Faults Without CHOPPER With dc chopper Fig 12: Mechanical torque output waveforms without and with chopper circuit
  • 7. International Journal of Electrical Engineering and Technology (IJEET), ISSN 0976 – 6545(Print), ISSN 0976 – 6553(Online) Volume 5, Issue 6, June (2014), pp. 35-43 © IAEME 41 Without dc copper With dc chopper with out dc chopper With dc chopper Fig.13: stator three phase voltage & current output waveforms without and with chopper circuit Without dc chopper With dc chopper
  • 8. International Journal of Electrical Engineering and Technology (IJEET), ISSN 0976 – 6545(Print), ISSN 0976 – 6553(Online) Volume 5, Issue 6, June (2014), pp. 35-43 © IAEME 42 CONCLUSION Speed of energy is the main reason why WECS preclude the ability and improve the balance - this system may be based on a maximum limit on the devices Power - systems sometimes need a technique developed that meet the needs of wattage - PMSG based WECS is strategy be working on the basis of the generator are correct and be control by organizing force in the side of the network and the changes that occur in the engine part may cause increased problems on thrusting, which does not accept the basic idea - and control on the part of the birth of the b damping and collects rings extra accuracy on the part of the network and gives speed and more accurate when error occurs in the network-Dc chopper is controlled and change is necessary strategy required that cause changes (distortions) and works to reduce when the error occurs - it is important for engineering designs to be simple implementation and be responsive any variable occurs on the part of the generator and the link voltage may cause volatility must strategy useful for some kind of change and about the best piece to be Hai requested operation used when the error occurs. REFERENCES [1] M. Chinchilla, S. Arnaltes, and J. C. Burgos, “Control of permanent-magnet generators applied to variable-speed wind-energy systems con-nected to the grid,”IEEE Trans. Energy Convers., vol. 21, no. 1, pp. 130–135, Mar. 2006. [2] H. Polinder, F. F. A van der Pijl, and P. Tavner, “Comparison of direct-driveand geared generator concepts for wind turbines,” IEEE Trans. EnergyConvers., vol. 21, no. 3, pp. 543–550, Sep. 2006. [3] F. Iov, A. D. Hansen, P. Sørensen, and N. A. Cutululis, “Mapping of gridfaults and grid codes,” Risø Nat. Lab., Tech. Univ. Denmark, Roskilde,Denmark, Tech. Rep. Risø-R- 1617(EN), Jul. 2007. [4] C. Saniter and J. Janning, “Test bench for grid code simulations for multi-MW wind turbines, design and control,”IEEE Trans. Power Electron.,vol. 23, no. 4, pp. 1707–1715, Jul. 2008. [5] J.-H. Jeon, S.-K.Kim, C.-H.Cho, J.-B.Ahn, and E.-S. Kim, “Developmentof simulator system for micro-grids with renewable energy sources,” J.Electr. Eng. Technol., vol. 1, no. 4, pp. 409–413, Feb. 2006. [6] R. Pollin, H. G. Peltier, and H. Scharber, “Green recovery: A newprogram to create good jobs and start building a low-carbon economy,”Center for American Progress, Washington, DC, Sep. 2008. Available:http://www.peri.umass.edu/fileadmin/pdf/other_publication_types/green_economic s/peri_report.pdf. [7] H. M. Pirouzy and M. T. Bina, “Modular multilevel converter based STAT-COM topology suitable for medium-voltage unbalanced systems,” J.Power Electron., vol. 10, no. 5, pp. 572–578, Sep. 2010. [8] Nadiya G. Mohammed, HaiderMuhamadHusen and Prof. D.S. Chavan, “Fault Ride-Through Control for a Doubly Fed Induction Generator Wind Turbine Under Unbalanced Voltage Sags”, International Journal of Electrical Engineering & Technology (IJEET), Volume 3, Issue 1, 2012, pp. 261 - 281, ISSN Print: 0976-6545, ISSN Online: 0976-6553. [9] Dr. Rajseh Kumar Ahuja and Priyanka Phageria, “Dstatcom Based Voltage Regulator for Wind Turbine Driven Self-Excited Induction Generator”, International Journal of Electrical Engineering & Technology (IJEET), Volume 4, Issue 3, 2013, pp. 209 - 219, ISSN Print: 0976-6545, ISSN Online: 0976-6553.
  • 9. International Journal of Electrical Engineering and Technology (IJEET), ISSN 0976 – 6545(Print), ISSN 0976 – 6553(Online) Volume 5, Issue 6, June (2014), pp. 35-43 © IAEME 43 [10] Nadiya G. Mohammed, “Application of Crowbar Protection on DFIG-Based Wind Turbine Connected to Grid”, International Journal of Electrical Engineering & Technology (IJEET), Volume 4, Issue 2, 2013, pp. 81 - 92, ISSN Print: 0976-6545, ISSN Online: 0976-6553. [11] Bikram Das, Prabir Rn. Kasari, Abanishwar Chakraborti, Prasul Jain, Sanjay Raghuwanshi and Pawan Kr. Navin, “Battery Energy Storage and Power Electronics Based Voltage and Frequency Controller for WECS Connected to Grid”, International Journal of Electrical Engineering & Technology (IJEET), Volume 4, Issue 2, 2013, pp. 283 - 292, ISSN Print: 0976-6545, ISSN Online: 0976-6553. [12] F. K. A. Lima, A. Luna, P. Rodriguez, E. H. Watanabe, and F. Blaabjerg,“Rotor voltage dynamics in the doubly fed induction generator during gridfaults,” IEEE Trans. Power Electron., vol. 25, no. 1, pp. 118–130, Jan.2010. [13] L. G. Meegahapola, T. Littler, and D. Flynn, “Decoupled-DFIG fault ride-through strategy for enhanced stability performance during grid faults,”IEEE Trans. Sustainable Energy, no. 3, pp. 152–162, Oct. 2010. [14] Anas Abdulqader Khalaf, “Unified Power Control Under Different Grid Conditions for Pmsg- Based Wecs”, International Journal of Electrical Engineering & Technology (IJEET), Volume 5, Issue 5, 2014, pp. 44 - 56, ISSN Print: 0976-6545, ISSN Online: 0976-6553. [15] Haider M. Husen, Laith O. Maheemed and Prof. D.S. Chavan, “Enhancement of Power Quality in Grid-Connected Doubly Fed Wind Turbines Induction Generator”, International Journal of Electrical Engineering & Technology (IJEET), Volume 3, Issue 1, 2012, pp. 182 - 196, ISSN Print: 0976-6545, ISSN Online: 0976-6553. [16] Q. Song and W. Liu, “Control of a cascade STATCOM with star con-figuration under unbalanced conditions,” IEEE Trans. Power Electron.,vol. 24, no. 1, pp. 45–58, Jan. 2009. [17] W. H. Zhang, S.-J.Lee, and M.-S. Choi, “Setting considerations of distancerelay for transmission line with STATCOM,” J. Electr. Eng. Technol.,vol. 5, no. 4, pp. 522–529, Jul. 2010. [18] K.Rama Lingeswara Prasad and Dr.K.Chandra Sekhar, “A New Sensorless Control Strategy for a Variable Speed PMSG Wind Energy System Connected to Grid”, International Journal of Electrical Engineering & Technology (IJEET), Volume 4, Issue 5, 2013, pp. 146 - 154, ISSN Print: 0976-6545, ISSN Online: 0976-6553. [19] G. Brando, A. Coccia, and R. Rizzo, “Control method of a braking chopperto reduce voltage unbalance in a 3-level chopper,” inProc. IEEE Int. Conf.Ind. Technol., 2004, vol. 2, pp. 975–978. [20] J. F. Conroy and R. Watson, “Low-voltage ride-through of a full converterwind turbine with permanent magnet generator,”IET Renewable Power.Generation, vol. 1, no. 3, pp. 182–189, Sep. 2007. [21] W. Li, C. Abbey, and G. Joos, “Control and performance of wind turbine generators based on permanent magnet synchronous machines feeding adiode rectifier,” inProc. IEEE Power Electron. Spec. Conf., Jun., 2006, pp. 1–6.