Dissertation > Excellent graduate degree dissertation topics show

Robust Approximate Feedback Linearization Method and Its Application in HVDC System

Author: YuJie
Tutor: YuFei
School: Qingdao University of Science and Technology
Course: Control Theory and Control Engineering
Keywords: HVDC transmission robust approximate feedback linearization (RAFL) nonlinear basic control
CLC: TM76
Type: Master's thesis
Year: 2008
Downloads: 97
Quote: 0
Read: Download Dissertation

Abstract


It is valuable in both theoretical and practical area to study the control of nonlinear systems. High Voltage Direct Current Transmission (HVDC) is a typical nonlinear system. HVDC is high controllable. The control system is the core of DC transmission system. The performance of its basic controller decides the operation condition of HVDC system. This dissertation researches and improves a novel nonlinear robust approximate feedback linearization method based on model observers to solve the control problems for a class of nonlinear systems. Also the application problems of HVDC control system are discussed in detail. And a nonlinear controller for HVDC system is designed.The main results and contributions of this dissertation are as follows:Firstly, robust approximate feedback linearization method is analyzed for single-variable nonlinear system. The multivariable nonlinear system is researched based on the analysis of the single-variable nonlinear system. The core ideas of the presented method are to estimate and compensate the extended state which includes the nonlinear dynamics, parameter uncertainties and disturbances. This method can avoid complex mathematic operations, counteract the nonlinear dynamics and enhance the robustness and adaptability of the control system against uncertainties. The corresponding design scheme of robust approximate feedback linearization is discussed and perfected.Secondly, HVDC system and its control characteristics are researched. First the state equations are established. Then the robust approximate feedback linearization method is applied to the HVDC system. This dissertation adopts the constant current control at the rectifier and the constant reactive power control at the inverter, and designs the robust approximate feedback linearization controller for HVDC system. At last, the simulation is done by PASCAD and MATLAB in this paper. The effectiveness and superiorities of new controller have been testified through simulation.

Related Dissertations

  1. Satellite Attitude Determination Based on Gyro and Star Sensor,V448.2
  2. Analysis and Study of Abutment Stability in Concrete High Arch Dam by Three-Dimensional Nonlinear Finite Element Method,TV642.4
  3. Copula-EGARCH-Kernel Density Estimation Model and Its Application,O211.3
  4. Complexes of two iodine three Allylthiourea together Synthesis and Characterization of cadmium,O627
  5. Periodic Solutions for Second Order Nonlinear Equations with Singular Vector φ-Laplacian-Like Operators,O175
  6. Mechanical Property Analysis on Concrete Short Columns with Strengthened Style Hoop,TU375.1
  7. Analysis of Nonlinear Finite Element with Opening Infill Wall Frame Structure,TU323.5
  8. Construction, Characterization and Properties of Tp~*-Containing W/S/Cu Clusters,O611.4
  9. Estimating Domains of Attraction and Designing Controller for a Class of Nonlinear Switched Systems,TP13
  10. Study on the Synthesis of Amide-Containing Ferrocenyl Organometallic Chromophore Third-order Nonlinear Optical Materials,O627.81
  11. Study on Mechanical Characteristic of Rubber Spring Used in Vibrating Screen,O322
  12. Research on Multi-hierarchical Model Predictive Control of Nonlinear System,TP273
  13. Second-order nonlinear singular ф-Laplace operator equations infinitely many times Subharmonic,O175
  14. Ultimate Strength and Reliability,U661.43
  15. Algorithm for automatic face beautification,TP391.41
  16. Qingdao soil pollution elements relevance, distribution and source of,X53
  17. Experiment on Static and Fatigue Behavior of Steel Plate-concrete Composite Bridge Decks,U441
  18. Chinese medicines by high performance liquid chromatographic fingerprints and non-linear chemical fingerprint of,R284
  19. Study on the Nonlinear Seismic Performance of Structure Supported by Foundations with Different Locations,TU352.11
  20. Study on Some Numerical Methods for Solving Nonlinear Evolution Equations,O241.6
  21. Application of Homotopy Perturbation Method to Solve Nonliear Differential Equation,O241.82

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