A New Multifunctional DVR for Compensation of Voltage Sag

 
 
 
  • Abstract
  • Keywords
  • References
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  • Abstract


    Now days, power quality is an important application. Sophisticated electronic equipments, variable speed drive having high efficiency,
    and power electronic controller, are used to improve power quality. Voltage sags are the most common power quality disturbance in the
    distribution system. It occurs due to the fault in the electrical network or by the starting of a large induction motor and this can be solved
    by using the custom power devices such as Dynamic Voltage Restorer (DVR). It is smaller in size, and provides fast dynamic response to
    the disturbance and also has lower cost. A multifunctional DVR is used here to improve the power quality with the help of Posicast and
    P+Resonant controllers to improve the transient response and eliminate the steady-state error. Simulation result shows the capability of
    the DVR to control the emergency conditions of the distribution systems. The current limitation will restore the point of common
    coupling (PCC) (the bus to which all feeders under study are connected) voltage and Protect the DVR itself. The innovation here is that
    the DVR acts as virtual impedance with the main aim of protecting the PCC voltage during downstream fault without any problem in real
    power injection into the DVR.


  • Keywords


    Point of common coupling (PCC), dynamic voltage restorer (DVR), emergency control, voltage sag, voltage swells.

  • References


      [1] Martinez JA & Martin-Arnedo J “Voltage sag studies in distribution networks-part II: Voltage sag assessment”, IEEE Trans. PowerDel., Vol. 21, No.3, (2006), pp.1679–1688.
      [2] Martinez JA & Arnedo JM “Voltage sag studies in distribution networks- part I: System modeling”, IEEE Trans. Power Del., Vol. 21, No.3, (2006), pp.338–345.
      International Journal of Engineering & Technology 393
      [3] Hcine P & Khronen, M “Voltage sag distribution caused by power system faults”, IEEE Trans. Power System, Vol.18, No.4, (2003), pp.1367–1373.
      [4] Choi SS, Li BH & Vilathgamuwa DM “Dynamic voltage restoration with minimum energy injection”, IEEE Trans. Power Syst., Vol. 15, No.1, (2000), pp.51–57.
      [5] Fitzer C, Barnes M & Green P “Voltage sag detection technique for a dynamic voltage restore”, IEEE Trans. Ind. Appl., Vol. 2, No.1, (2004), pp.203–212.
      [6] Benachaiba C & Ferdi B “Voltage quality improvement using DVR”, Electt. Power Qual. Utilisation, Journal, Vol.XIV, No.1, (2008).
      [7] Vilathgamuwa DM, Wijekoon HM & Choi SS “A novel technique to compensate voltage sags in multiline distribution system-the interline dynamic voltage restorer”, IEEE Trans. Ind. Electron., Vol. 53, No.5, (2006), pp.1603–1611.
      [8] Nielsen JG, Newman M, Nielsen H & Blaabjerg F “Control & testing of a dynamic voltage restorer (DVR) at medium voltage level”, IEEE Trans. Power Electron., Vol.19, No.3, (2004), pp. 806–813.
      [9] Sreelatha PNK, Praveen J & Kamaraju V “Voltage Sag Compensation with DVR for Different types of faults at a remote place on a remote feeder”, Eight Control Instrumentation System International Conference CISCON, Modeling & Simulation in Engineering Applications, (2011). [10] Sreelatha PNK, Praveen J & Kamaraju V, “Effect of unsymmetrical faults on distribution lines with different line X/R ratios and voltage restoration using DVR with Space vector control”, International Conference on Computing, Electronics and Electrical Technologies (ICCEET), (2012), pp.92-97
      [11] Praveen J, “Direct Power Control Strategy in the DVR for enhancing power quality”, National Conference on Electrical Power Engineering & Industrial Drives, (2012).
      [12] Sreelatha PNK, Praveen J & Kamaraju V, “Voltage sags in Distribution Systems with Induction motor loads fed by Power converters & voltage mitigation using DVR & D-STATCOM”, International Journal of Electrical Engineering, Vol.5, No.7, (2012), pp.889-901.
      [13] Li YW, Vilathgamuwa DM, Loh PC & Blaabjerg F, “A dual functional medium voltage level DVR to limit downstream fault currents”, IEEE Trans. Power Electron., Vol. 22, No. 4, (2007), pp.1330–1340.
      [14] Praveen J, “Digital Control System applications in Improvement of Power Quality- Digital Simulation of Dynamic Voltage Restorer”, presented at a two day National level workshop on Control Systems applications to Power Electronics Drives & Systems, (2012).
      [15] Vinay Kumar A, Praveen J & Tara Kalyani S, “Adoption of Direct Power Control Strategy for Enhancement of Dynamic Voltage Restorer”, National Journal on Electrical Power Engineering & Industrial Drives (NJEPEID), Vol.1, No. 2, (2012), pp.200-205.
      [16] Hussain K & Praveen J, “A Seven Level Cascaded Multilevel Inverter Based Dynamic Voltage Restorer”, International Journal of Electrical, Electronics & Telecommunication Engineering, Vol.44, No.1, (2013), pp.1121-1129.
      [17] Loh PC, Vilathgamuwa DM, Tang SK & Long HL, “Multilevel dynamic voltage restorer”, IEEE Power Electron. Lett., Vol. 2, No.4, (2004), pp.125–130.
      Authors profile
      N.Srinivasa Rao did his M.tech at J.B.I.E.T Hyderabad with specialization of Electrical Power systems. He received Gold medal for his academic Excellence. He is currently Research Scholar and present working as Associate Professor in EEE department at Narasimha Reddy Engineering College, Hyderabad. His research interests include Power Systems, Power Quality, Power Electronics.
      Dr. A. Selwin Mich Priyadharson obtained his Diploma in Instrumentation & Control Engineering from Government Polytechnic, Udhagamandalam, India. Graduated B.E (Instrumentation & Control engineering) affiliated to M.K University and completed his M.E (Control & Instrumentation Engineering) affiliated to Anna University, from Arulmigu Kalasalingam College of Engineering Srivilliputhur, India. He has obtained his Ph.D degree in Electronics Engineering from Sathyabama University, Chennai. Currently he is working as Associate Professor in School of Electrical, Vel Tech Rangarajan Dr. Sagunthala R&D Institute of Science and Technology, Avadi, Chennai, Tamil Nadu, India. His area of interest Encompasses automation, adaptive, predictive, neural networks, fuzzy logic, expert systems, networking, modeling and simulation.


 

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Article ID: 17375
 
DOI: 10.14419/ijet.v7i3.20.17375




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