Dissertation > Excellent graduate degree dissertation topics show

Reseach on the Comprehensive Compensation Program of Daqin Railway

Author: WuWenXing
Tutor: LiQunZhan
School: Southwest Jiaotong University
Course: Proceedings of the
Keywords: Daqin railway Electrical railway Power quality Comprehensive Compensation Dual-Phase SVG
CLC: TM714.3
Type: Master's thesis
Year: 2010
Downloads: 130
Quote: 3
Read: Download Dissertation

Abstract


Daqin railway is a modernized dedicated transportation line for coal, which is the first heavy haul electrified and the most important railway in China. The electrical railway is a special user of power system; the load has many disadvantages like acute fluctuation, nonlinear and asymmetry. It produces serial power quality problems such as reactive power excessive, negative exceeding, containing high harmonic. These problems influence not only the operating of electrical railway safely and efficiency but also the power quality of power system, thus influence other users. Therefore, to solve power quality problems of Daqin railway is a very significant research topic, which would not only reduce operational costs of the Daqin railway, but also prevent the electrical pollution injected to the power system.In this paper, based on the detected data of a transformer substation of Daqin railway, the power quality of this transformer is analyzed, and the purpose of comprehensive compensation is determined. Aiming to the wiring mode of Scott balance transformer, the analysis methods of reactive, negative and harmonic are introduced. In terms of analysis of principle above, a dual-phase SVG program is proposed since compare with other compensation program. Then the principle of this SVG is elaborated, the structure is analyzed, the balance principle and the equal models in railway power supply are also analyzed. For the simple-phase feature of traction grid and the active power circulating between the two arms, an improved method of simple-phase compensating current detecting is used. And then the control strategy is formulated, the tracking control of instruction current is realized. On the basis of the work above the compensation current needed is produced by the dual-phase SVG.On the analysis and computation, the parameter of main circuit and the capacity is to be reached. The simulation model of the SVG is build up by using Matlab/Simulink, and the load model is constructed according to the data of detecting. The results show that the effects of reactive power compensation, negative balance and harmonic inhibition are all satisfactory. Finally the conclusion is that the dual-phase SVG program is effective.

Related Dissertations

  1. Study and Development of Software Platform of Power Quality Monitoring System Based on Modbus Protocol,TM769
  2. Active Power Filter and Its Application in Distribution Network,TN713.8
  3. Study of a Novel Coordinate Control Strategy of Unified Power Quality Conditioner,TM761
  4. Based on GSM module power quality monitoring system design,TN929.532
  5. Design of Power Quality Monitoring System Based on Time-Frequency Domain Analysis Method,TM76
  6. Study on Single-phase Shunt Active Power Filter with One-Cycle Control,TM761
  7. Harmonic Detection Based on Improved Independent Component Analysis Algorithm,TN911.7
  8. A System on Voltage Sag Analysis Based on Virtual Instrument,TM714.2
  9. Research on Power Quality Monitoring and Evaluation System in Distributed Power System,TM73
  10. Electric Power Quality Control Study Based on the Measured Data,U223.52
  11. Asynchronous Sampling Based Power Quality Monitor,TM76
  12. A System on Disturbance Property Load Assessment Based on Virtual Instrument,TM714
  13. Study on the Power Quality Comprehensive Evaluation and the Control Measures,TM614
  14. Study of the Power Quality Problem Caused by Large-scale Integrated Wind Farm,TM711
  15. Design of Power Quality Monitoring System Based on Virtual Instruments and Database Technology,TM76
  16. The Application of Digital Signal Processing in Detecting of Power Quality Parameter,TN911.72
  17. Design and Implementation of Power Quality Analyzing System,TP311.52
  18. Research on Power Quality Detection Based on DSP,TM711
  19. The Optimal Allocation of Monitoring Nodes for Voltage Sags Based on the Analysis of the Area of Vulnerability,TM714.2
  20. Impact of electrified railway grid of Liaocheng,TM727.2
  21. Power Quality Differential Pricing Method Based on Game Theory,F426.61

CLC: > Industrial Technology > Electrotechnical > Transmission and distribution engineering, power network and power system > Theory and Analysis > Load analysis > Reduce energy loss and reactive power compensation system
© 2012 www.DissertationTopic.Net  Mobile