Dissertation > Excellent graduate degree dissertation topics show

Two-stage Matrix Converter with legs

Author: WangHui
Tutor: SuMei
School: Central South University
Course: Electrical Engineering
Keywords: two-stage four-leg matrix converter three-phase four-wires system carrier modulation strategy repetitive control
CLC: TM46
Type: Master's thesis
Year: 2011
Downloads: 43
Quote: 0
Read: Download Dissertation

Abstract


The two-stage matrix converter is a new type of the matrix converter based on three phase AC-DC-AC two-stage topological structure and have physical rectifer and inverter which is similar to the traditional three phase AC-DC-AC converter. For its functions with a two-way flow of energy, sinusoidal input and output current, and controllable input power factor, without intermediate energy storage capacitance,it is a potential matrix converter with good prospect.But in normal applications,there usually exsists three-phase unbalenced loads or demands three-phase four-wires system.Since the two-stage matrix converter cannot provide road for zero sequence current, it has been limited to apply to such situations.The two-stage four-leg matrix converter is derived from the traditional two-stage matrix converter by adding a neutral leg in the inverter stage.As the neutral leg in the two-stage four-leg matrix converter can provide the road for zero sequence current, therefore the two-stage four-leg matrix converter is very suitable in three-phase four-wires applications.The topology of the two-stage four-leg matrix and the modulation methods were studied at first in this paper,math model of the two-stage four-leg matrix converter based on average in switching periods was also built. The paper also analysed the influence of unbalenced loads to the input currents in steady state. The close-loop control strategy and the design of the repetitive controller for this system was presented,the results of numeric simulation based on Matlab simulink toolbox demenstrates the correctness and feasibility of the control strategy.The paper analysed the nolinear factors in practical two-stage four-leg matrix converter and proposed various compensation strategies. At last,the carrier modulation and control algorithm were implementated on a 10 KVA prototype,the results demenstrates the correctness and feasibility of the modulation strategy and the control algorithm.

Related Dissertations

  1. Grid-Side Converter Control and Wind Turbine Emulator in Direct Drive Wind Power System,TM46
  2. Research on Photoltaic and Its Key Technology,TM615
  3. Three-phase line current balance of reactive power compensation technology,TM714.3
  4. Research on Parallel and Protection Technology of High-power Single-phase Inverter,TM464
  5. Research on Gas-Liquid Phase Velocity Measurement of Oil-Gas-Water Three-Phase Flow Based on Independent Component Analysis and Time Delay Estimation,TP274
  6. 0.5s Three-phase Multi-Function Watt-hour Meter Principle, Design and Implementation,TM933.4
  7. Researches on the Related Questions of the Speed Sensorless Vector Controlled Induction Motor System,TM346
  8. Design And Realization of High-Power Hybrid Wind and Photovoltaic Generation Independent Power System,TM614
  9. The Improved Localized Generalization Error Model and Its Application to Feature Selection,O157.5
  10. Research on Drive Technology for Three Phase Hybrid Step Motor Based on Space Vector Modulation,TM383.6
  11. Capacitors ( series resonant ) frequency power supply AC voltage test systems research,TM464
  12. Study on Movement and Absorption Characteristic of Three-Phase Fluidized Bed with Multiple Orifice Balls,X701.3
  13. Large capacity based on repetitive control Shunt Active Power Filter several key technologies,TN713.8
  14. The Research on Advanced Control Methods for High Power Shunt APF,TN713.8
  15. DSP-based line of Digital UPS,TN86
  16. Three-phase automatic submerged arc furnace electrode lifting control system research and application,TP273
  17. Unbalanced three-phase PWM Rectifier grid,TM461
  18. Study on Heat Transfer Enhancement in Three-phase Flow Closed Gravity Heat Pipe,TK124
  19. Study on Numerical Modeling of Effective Conductivity for Complex Multi-phase Medium,P631.84
  20. Simulation and Design of AC Motor Controller Used in Pure Electric Bus,U463.6

CLC: > Industrial Technology > Electrotechnical > Transformers, converters and reactors > Converter
© 2012 www.DissertationTopic.Net  Mobile