Dissertation > Excellent graduate degree dissertation topics show

Calculation and Improvements of Large Grounding Grid Surface Potential Distribution

Author: ZhouWenLe
Tutor: ZhuKang；DaiYuSong
School: West China University
Course: Proceedings of the
Keywords: Grounding resistance Potential distribution Contour map
CLC: TM862
Type: Master's thesis
Year: 2011
Downloads: 31
Quote: 0
Read: Download Dissertation

Abstract


Into the 21st century, more and more extra-high voltage and high-voltage power grid have been building by the National Grid. Then the power system voltage level got higher and higher, which makes the system of the short-circuit current increasing. So it makes a higher requirement for the designer to design and measurement of the power system. In the past, we determine whether the ground grid safety or not by measuring the ground resistance, which method is mainly used to evaluate. But in fact, the risks when the ground grid is flowing a high current were the potential distribution, the step voltage and the contact voltage. In this paper, students with previous study, which has studied the simulations that how to measured the potential distribution and the potential gradient in an irregular ground grid spacing distribution range, I improved the program. And the simulation could get more accurate measurement results.In this paper, an improved program could calculated any structure of the grounding grid. Through the software of Origin to analyze the results obtained, it could draw the surface potential distribution of the grounding grid, which can be more intuitive and clear reflect the whole surface potential distribution. If we got it, we can analyze of different grounding easily.The symmetrical distribution of the network is calculated to prove the correctness of the program. The calculation of the irregular structure network show that all kinds of irregular network is applicable to calculate. The calculation of the network with long conductor proved the rationality of the improved program. Using a mathematical model to find error in the program and improve it, we can improve the accuracy of the program’s operation.Finally, I use this program to calculate a large-scale substation grounding, and analyze using Origin software, draw the surface potention distribution of three-dimensional map and gray scale image. By comparing these two sets of data and graphics, it could show the rationality of the improved program. By comparison with the measured data proves the correctness and rationality of the program. Finally, it work out the calculation and analysis methed is more direct and effective analysis whether or not the rational of grounding grid layout and security. This methed could give some direction to valuate the grounding grid’s safety.

Related Dissertations

  1. Design and Application for Jiangxi 200kV Transmission Line Towers Grounding Device,TM862
  2. The Engineering Design of Substation Grounding System in Wuhai District,TM862
  3. CropMAP of Oat in China,S512.6
  4. Study of Method on Grounding Resistance Measurement with Short Electrode Wire and New Decreasing Resistance Technology,TM934.1
  5. Risk Analysis of Anoplophora Glabripennis in Western China,S763.3
  6. Study on Method of Grounding Resistance Measurement with Short Electrode Wire and DC Grounding,TM862
  7. Selection of Resistance Reducing Schemes and Grounding Materials in Substation Grounding System,TM862
  8. Research on Reform Measures of Grounding Networ of Jinjiang Hydropower,TV734
  9. Research on the Method To Measure Grounding Resistance of Substation with Short Lead Wire Current Electrode,TM934.15
  10. Research on the Substation Grounding System and Analysis of Fault Diagnosis,TM862
  11. The Risk Assessment Technology on Alien Invasive Species (Solenopsis Invicta, Flaveria Bidentis),S451
  12. Spatial Pattern of the Wheat Midge Sitodiplosis Mosellana (Gehin),S435.122
  13. The Characteristic Analysis of the High-speed Railway Roadbed Section’s Integrated Grounding System,TM862
  14. The System of Visual Prediction of Mining Subsidence on Basis of C#,TD325
  15. Research of Farmland Information System Based on GDAL,TP311.52
  16. Based on the theory of multi-target tracking FISST Research,TN953
  17. Study on the Novel Line Selection of Singel-Phase-Grounded in the Small Current Earth System,TM862
  18. Monitoring and IPM Technologies of Seabuckthorn Carpenterworm, Holcocerus Hippophaecolus (Lepidoptera: Cossidae),S763.7
  19. Analysis on Distribution Characteristics of the Reference Crops Evapotranspiration （ET0） Base on GIS in Inner Mongolia,S161.4
  20. The Major Behavioral Aspects, Supercooling Capability and Risk Assessment of Solenopsis Invicta (hymenoptera: Formicidae) in Mainland China,S433

CLC: > Industrial Technology > Electrotechnical > High Voltage Engineering > Overvoltage and Its Protection > Over-voltage protection devices
© 2012 www.DissertationTopic.Net  Mobile