Dissertation > Excellent graduate degree dissertation topics show

Study on Reason and Modification Technique of Neutral Displacing Voltage of 35kV System in Daqing Oil Field

Author: CongWenKui
Tutor: LiLinChuanï¼›ZuoBaoGeng
School: Tianjin University
Course: Electrical Engineering
Keywords: 35kV system Neutral point Arc suppression coil Three - phase voltage unbalance Displacement voltage Coupling capacitors
CLC: TM862
Type: Master's thesis
Year: 2009
Downloads: 25
Quote: 0
Read: Download Dissertation

Abstract


System neutral point of of Daqing Oilfield grid 35kV generally arc suppression coil grounding, running three-phase voltage imbalance exists, the phenomenon of the neutral point displacement voltage is too large, seriously affect the safe operation of the oilfield grid. Therefore, analysis to find the neutral point displacement voltage is too large and take effective measures to eliminate an important significance to the protection of the safe and reliable operation of the Daqing oil field grid. Neutral point displacement voltage of neutral grounding, and the neutral point ungrounded system in-depth study of the theory based on the combination of of Daqing Oilfield grid 35kV system neutral point run status quo, first analyzed the system neutral point run the main problem for the neutral unbalance voltage high. After using EMTP / ATP electromagnetic transients program to establish a system simulation model, and analyze the causes of the derived system neutral point displacement voltage: First, because of the different operating mode, the the oilfield power grid arc suppression coil stalls inappropriate choice of ; system network architecture in three relatively capacitor uneven. This paper also field test results to verify the accuracy of the simulation model. Subsequently, the combination of the causes of the neutral point displacement voltage is too high, reduce the neutral point displacement voltage rectification program to re-establish the simulation model to conduct a comprehensive analysis of different rectification program, difficult to implement, effect and cost-effective optimum improvement measures comparison the coupling capacitor phase modulation install also calculated the system neutral point displacement voltage and residual current in the arc suppression coil cast different stalls provide for reasonable regulation of the arc suppression coil stalls the necessary data to support. The field test results further validate the correctness of the calculation results of the simulation model and the effectiveness of the improvement measures. Finally, the oil field power system using this technology, system neutral point displacement voltage indicators of long-term not more than 2.1% of the phase voltage; grid asymmetry index of not more than 1.0%; arc suppression coil operation rate of 100%. The practical result shows: the technology to solve the problem of arc suppression coil inputs low, reducing the power grid failure rate, reduce the damage to the electrical equipment, and significantly improve the reliability of power supply. In addition, the technology and research methods, the design of the power lines has important guiding significance, 35kV through arc suppression coil grounding system has certain reference value.

Related Dissertations

  1. Panzhihua Iron and Steel Xichang vanadium and titanium steel base back to fill in the pile negative friction resistance research,TU473.1
  2. The Influence of Direct-current Magnetic Biasing to High Voltage Equipment and Countermeasures,TM721.1
  3. Research on Control Strategy of STATCOM for Voltage Fluctuation in Wind Energy Conversion Systems,TM464
  4. A DSP Based Three-level Speed Regulation System,TM464
  5. Research and Test on Transformer Neutral DC Current Blocking Device,TM406
  6. Research of Auto-turning Arc Suppression Coil by Switching Parallel Capacitor and Non-solidly Earthed Line Selection Based on the DSP2812,TM475
  7. Research on High Short-circuit Impedance Transformer Arc Suppression Coil Based Grounding System,TM475
  8. The Research on Three-level PWM Rectifier and the Elimination of High Frequency Harmonics in Grid Side,TM461
  9. Study on the System of Automatic Compensation of Resonant Grounded Power System,TM862
  10. The Research on the Measurement of Capacitance Current in Resonance System with Following-Setting Compensation Mode,TM862
  11. Study on Transformation of Neutral Grounding Mode for Medium Voltage Distribution Network,TM862
  12. The Research on the Neutral Point Grounded Mode of YongMei Group 6kV Distribution Power Networks,TM862
  13. Research on Grid Connected Inverters for Wind Power System,TM464
  14. Fault Analysis of 6.3kV Small Current Grounding System in Longfeng Power Plant,TM862
  15. Based on three -level topology of STATCOM,TM464
  16. The Manufacture of Three-level PWM Rectifier,TM461
  17. Voltage Control Strategy for the Neutral-Point-Clamped Three Level Converter,TM464
  18. The Research of the Control Strategy for Three-level Diode-clamped Convertors Based on Zero-sequence Voltage,TM464
  19. Three-phase four-leg inverter control and design,TM464
  20. Research on Fluctuation of Neutral Point Potential in Three-Level Neutral-Point-Clamped Inverter,TM464

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