Dissertation > Excellent graduate degree dissertation topics show

Studies on Control Strategy to Improve the Performance of High Volume Shunt Active Power Filter

Author: GuYu
Tutor: ChenGuoZhu
School: Zhejiang University
Course: Power Electronics and Power Drives
Keywords: active filtering state feedback pole assignment estimator repetitive control
Type: Master's thesis
Year: 2008
Downloads: 333
Quote: 2
Read: Download Dissertation


Along with the need of high efficiency of power supply, the power electronics equipments are used more and more widely, and the grid is contaminated more and more badly. The harmonics can make other equipments malfunction, and even endanger the grid. Active power filter (APF) gains comprehensively research because of its ability to compensate the harmonics changing in both frequency and magnitude.This thesis does some analysis, design and simulation to improve the efficiency and to get good transient-static performance of high volume active filter based on a "380V, 260kVA active power filter" supported by a company. This thesis firstly presents main circuit of active filter connected to the grid through an LCL filter, and further points out the advantages of this circuit to attenuate switching ripple used in low switching frequency and high volume situation. State feedback is select to choke the resonance of LCL filter by comparing with the PI control.Supposing the grid as disturbance, mathematic models of LCL filter in abc three-phase stator coordinate is established, then this thesis makes pole assignment by selected the expectation pole. For remove the influence of the grid input on APF tracking the reference, introduces feed forward of grid voltage, and gives the concretely formula of the feed forward. The estimator is designed later by bringing the gird input model into the estimator to eliminate. Because of the fluctuation of inductance L2 considering the on site installation of APF, the flexibility of controller have been studied. Repetitive controller also is designed out of state feedback control loop to improve static performance of APF.Finally, a system model of APF to compensate 1MW three phase rectifier load is established. The simulation results confirm the correction of design and research work.

Related Dissertations

  1. Based on statistics of the lognormal distribution heteroscedasticity model inferred,O212.1
  2. Digital Delta Type UPS Design and Research,TN86
  3. Research on Output Control and Parallel Operation Technology of UPS Inverters,TM464
  4. Linear Motor XY stage control strategy,TP273
  5. X-Y linear motor CNC platform repeated tracking control,TM33
  6. Three-phase three-wire shunt active power filter repetitive control study,TN713.8
  7. Linear Servo System Based on thermoacoustic engine output characteristic simulation study,TM301
  8. Neural Network PI Pepetitive Controller for Active Power Filter,TN713.8
  9. Information Geometry and Applications,O186.12
  10. Heavy-tailed extreme value index estimation,O211.4
  11. Some Research on Regression Model with Censored Data,O212.1
  12. With missing covariates relative risk estimate model theory and its asymptotic properties,O212.1
  13. Rearch on Dynamic Parameters and Model Establishment of Machine,TG502.12
  14. Analysis of Contour Error and Contour Algorithms of CNC Machine,TG659
  15. Modeling and Control System Design of Nonlinear Boiler Steam Temperature and Simulation Application,TM621.2
  16. Research on Parallel and Protection Technology of High-power Single-phase Inverter,TM464
  17. Research on Harmonic Suppression Technology in Three-phase Four-wire System,TM464
  18. Analysis and Control of Shunt Dynamic Voltage Regulators,TM761.1
  19. Two-stage legs in the matrix converter modeling and control,TM46
  20. Way to overcome repeated strip snaking motion correction control system,TP273
  21. Study of Mine Hoist System Identification and Adaptive Control,TP273.2

CLC: > Industrial Technology > Electrotechnical > Transmission and distribution engineering, power network and power system > Power system automation
© 2012 www.DissertationTopic.Net  Mobile