Dissertation > Excellent graduate degree dissertation topics show

Study on the Lithium Battery-supercapacitor Hybrid Energy Storage Systemand Its Application in Wind Power Generation

Author: WangHui
Tutor: WangLuYang
School: Shanghai University of Electric Power
Course: Proceedings of the
Keywords: wind power generation hybrid energy storage system LiFePO4battery supercapacitor
CLC: TM614
Type: Master's thesis
Year: 2013
Downloads: 113
Quote: 0
Read: Download Dissertation

Abstract


Using energy storage system is an effective way to improvegrid-connected characteristic of wind power and the capability of power gridabsorbing wind power. At present, many energy storage techniques are used inwind power generation, and battery storage system and supercapacitor storagesystem is more widely used. However, restricted by the energy storagemechanism and technical level, the single battery or supercapacitor energystorage system can not provide high power and high energy at the same time,which can not fully meet the requirements of smoothing the wind power output.Therefore, the lithium battery-supercapacitor hybrid energy storage system andits Application in wind power generation are studied.Firstly, the characteristics as well as the modeling of lithium battery andsuper capacitor are studied. Based on the analysis of the existing models, thePNGV Model is selected because it is preferable to simulating thecharacteristics of LiFePO4battery used in wind power generation. Theemphasis is put on the identification methods of PNGV model parameters. Inthe light of the shortage of the method of discharge static for identifyingparameters of the open circuit voltage, the method of continuouscharge-discharge experiment is proposed, which can obtain open circuit voltagedata simply and fastly. The resistance and capacitance parameters of the modelare calculated by hybrid pulse power performance testing on LiFePO4battery.The characteristics and existing models of supercapacitor are analyzed, and asimple RC series model is used to simulate the supercapacitor. The model ofLiFePO4battery and supercapacitor is established respectively, the simulationresults demonstrate the validity of the model.Secondly，the hybrid energy storage system structure is designed, and thecontrol strategies of hybrid energy storage system is deeply researched. Basedon the characteristics of the little changes of lithium battery terminal voltage,the structure of lithium battery directly coupled to DC bus of hybrid energystorage system is presented, which can save a DC/DC converter, simplify thecontrol process and reduce the loss of system; the control strategy of smoothwind power fluctuations is researched based on the low-pass filtering methods,and using the hybrid energy storage system reduces the specific component ofwind power fluctuations is presented and the power control signal of hybridenergy storage system is obtained through calculating; the corresponding power allocation strategy based on the physical properties of the lithium battery andsuper capacitor is presented; the power and capacity configuration scheme ofhybrid system which can meet the demand of smoothing process is proposed.Finally, the application of the hybrid energy storage technology in windpower generation is researched by simulation. Based on the existing model ofdirect-driven permanent magnet synchronous wind energy conversion system,the wind active power curve is obtained. In view of stabilizing fluctuation ofthis power curve, a detailed process to calculate the power and capacityconfiguration of hybrid energy storage system is given, and the packing methodof LiFePO4batterys and supercapacitors are simply designed respectively. Inthe environment of MATLAB/Simulink，the simulation model is established.The results show the hybrid energy storage system can stabilize the wind powerfluctuation effectively, and it has significant advantages.

Related Dissertations

  1. Grid-Side Converter Control and Wind Turbine Emulator in Direct Drive Wind Power System,TM46
  2. Flexible Electrodes Material Based on Polypyrrole Composites and Capacitance Properties for Supercapacitor,TM53
  3. Study on Electhode Materials of High Surface Area Activated Carbon with Different Pore Structures for Supercapacitor,TM53
  4. Preparation of Metal Oxides Electrode by Eelectrospining and Studies on Electrochemical Supercapactors,TM53
  5. The Research of Wind Power Generation System Based on DFIG,TM614
  6. Structural Control of Hierarchical Porous Carbon and Its Composites and Their Electrochemical Performance,TM53
  7. Preparation and Application of Phenolic Resin-based Spherical Activated Carbon,TQ424.1
  8. Preparation of Functional Multi-walled Carbon Nanotubes for Using in Electrochemical Capacitor Materials and Its Electrochemical Performance,TB383.1
  9. Studies on Modeling and Control of Distributed Energy Storage System in Microgrid,TM919
  10. Preparation of Graphene Composite Photoelectric Materials and its Performances,TB383.1
  11. Research on the External Characteristics of Distributed Generations and Loads,TM61
  12. The Research of Directly-driven PMSG Wind Power Generation System,TM614
  13. Study on the Control of Wind Turbine with Grid-Connected,TM614
  14. Research on Key Technique of Multi-unit Parallel Converter in Wind Power Generation System,TM46
  15. Research on Power System Static Security Risk Assessment Method,TM732
  16. Based on the two-dimensional graphene composites and preliminary application of,TB332
  17. Super capacitor energy storage system DC conversion technology research,TM53
  18. Super capacitor voltage balance System,TM53
  19. Composite Supercapacitor Electrode Materials Preparation and Properties,TM53
  20. Influences of Wind Power Integration on Power System and Low Voltage Ride-Through Control of Wind Power Generation System with DFIG,TM712
  21. Super capacitor battery cathode and anode materials,TM912

CLC: > Industrial Technology > Electrotechnical > Power generation, power plants > Variety of power generation > Wind power
© 2012 www.DissertationTopic.Net  Mobile