ZSC

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ZSC

  1. 1. A PAPER PRESENTATIONONIMPEDANCE SOURCE CONVERTER BASEDWIND ENERGY SYSTEMSByAlthaf hussaisn Shaik(K L university)Nadendla Srikanth(K L University)
  2. 2. THEME• To improve the utilization of wind energy system usingefficient generator and suitable converter.2221
  3. 3. OBJECTIVES The different generators used in wind energysystem. Why a PE converter needed in wind energy system. How the z source converter different from otherconverters.32
  4. 4. WIND ENERGY CONVERSION SYSTEM Fig: Block diagram• Fixed speed wind turbines• Partially Variable speed wind turbines• Fully Variable speed wind turbinesElectricalGeneratorWindturbinePowerelectronicinterfaceGird43
  5. 5. VARIABLE SPEED WIND ENERGYCONVERSION SYSTEMDFIG TransformerWindgear externalbox gridpartial-rating power converterFig: variable speed wind energy conversion systemGDCACAC54
  6. 6. FULLY VARIABLE WIND ENERGY CONVERSIONSYSTEMAC-DCconverterDC-ACconverterDCACGridGearboxSyn generatorDC-LinkFig: Fully-variable system 65
  7. 7. WHY DFIG ?• DFIG provides more operating range compared to other• It provides -40% to +30% speed range.• The power flows in both rotor and stator76
  8. 8. WHY A P.E CONVERTER IS NEEDED IN WINDENERGY CONVERSION ?• The wind flows may not be fully controlled and cancause variances in the frequency at which the power isgenerated.• Power electronic devices are utilized in these systems toconvert the generated ac voltages into HVDC.• Through these devices, the power delivered by thesesystems is cleaner and has a higher P.F .87
  9. 9. COMPARISON OF WIND ENERGY CONVERSIONSYSTEMSSno:WECBased on GeneratorGridintegration1 Fixed speedSystemInductiongeneratorDirect2Partially variableSystem DFIG VSC3 Fully-variablesystemInduction orsynchronous VSC or ZSC98
  10. 10. WIND ENERGY CONVERSION SYSTEMFig: fully variable system109
  11. 11. BOOST CONVERTER + INVERTERFig: WEC system with boost converter and inverter1110
  12. 12. Z-SOURCE INVERTERFig: WEC system with Z-source converter1211
  13. 13. SINGLE PHASE ZSCvz s a stz s a sFig: single phase z-source converter1312
  14. 14. ACTIVE STATEFig: Active state 1413
  15. 15. SHOOT THROUGH STATEFig: Shoot through state1514
  16. 16. SWITCHING SEQUENCES.no S1 S2 S3 S4 STATE1 1 1 0 0 Zero2 1 1 0 1 Shoot through3 1 0 1 0 Active4 1 1 1 0 Shoot through5 0 0 1 1 Zero6 0 1 1 1 Shoot through7 0 1 1 0 Active8 1 0 1 1 Shoot through 1615
  17. 17. 4Fig: MATLAB simulation1716
  18. 18. RESULTSFig: Active and shoot through states1817
  19. 19. ZSI SHOOT THROUGH STAGEFig: shoot through state1918
  20. 20. CONCLUSION:• By using both DFIG and ZSI in wind energy systems wecan get more efficiency and control over the active andreactive powers. The proposed system has highperformance, minimal count, increased efficiency andreduced cost.2019
  21. 21. Any queries ???2120
  22. 22. Thank You2221

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