Dissertation > Excellent graduate degree dissertation topics show

Research on Fault Location in Distribution Network with A Single-phase to Ground Fault Based on Hilbert-huang Transform and Genetic Algorithm

Author: LiDanDan
Tutor: KangZhongJian
School: China University of Petroleum
Course: Power Electronics and Power Drives
Keywords: fault location non-power frequency transient component fault characteristic matching technology genetic algorithm Hilbert-huang transform (HHT)
CLC: TM862
Type: Master's thesis
Year: 2011
Downloads: 197
Quote: 3
Read: Download Dissertation

Abstract


The precise fault location in the distribution power system network is a difficult problem, which has not been solved well.Studying on the problem has an important role in maintaining and restoring the system when a fault occurs. With the development of automation technology in distribution network and increasing requirements of power supply quality of users, the existing methods of fault location are not very effective in distribution network, it is necessary to further study the new method in distribution network.As for the existing methods of fault location are not very effective in distribution network, a new method based on non-power frequency transient component to select the fault line and a new method based on Hilbert-huang transform and genetic fault characteristic matching technology of fault location in distribution is proposed.Hilbert-huang transform is used to decompose fault zero-sequence current singals, to extract non-power frequency components of each line. The non-power frequency current of the fault line, extracted with HHT, have a contracy polarity as the currents of the other non-fault lines at the one-tenth of the wave period time after the fault occurs. These characteristic are used as evidence for fault selection in distribution network with the non-power frequency transient component. The method is precise and reliable.Based on the precise fault line selection, Hilbert-huang transform is used to extract the power distribution characteristics of zero sequence fault current in different time with different frequency. The genetic algorithm is used to automatically search the most similar simulation waveforms to the actual fault waveforms under different fault distance, grounded resistance and fault time.The fault position in the simulation condition of the most similar power distribution of simulation waveforms is the output of the fault distance. The new method using non-power frequency component to select the fault line, Hilbert-huang transform to extract the characteristic and genetic algorithm to automatically search the similar simulation waveforms is formed, and it has an important role in improving the precision of fault location.The new method of fault location in distribution network with a single-phase-to-earth fault based on Hilbert-huang transform and genetic algorithm can be used to locate the fault point precisely, and can be used in air-line, cable and cable-line un-effectual grounded system.

Related Dissertations

  1. Development of the Platform for Compressor Optimization Design and Aerodynamic Optimization Design in the Transonic Compressor,TH45
  2. The Application of Fuzzy Comprehensive Evaluation Based on Genetic Algorithm in Vocational Evaluation of Classroom Teaching,G712
  3. The magnetorheological damper mechanical properties and Gun Recoil,TB535.1
  4. Fault Localization Method for Distribution Network Based on Fault Indicators,TM711
  5. Examination System Based on WEB Technology Research and Implementation,TP311.52
  6. Oscillatory Fault Location of Multi-Loop Process Systems,O231
  7. Coordination Scheduling Problem of Single Machine Manufacturing with Delivery in Supply Chain Environment,TH186
  8. Repair auxiliary cable fault detection system development,TM247
  9. Research and Application on Fault Location and Online Monitoring System of Distribution Network,TM76
  10. Research and Realization of Fault Location in Distribution Network,TM732
  11. Research on Feature Extraction, Selection and Classification Algorithms for Pulmonary CAD,TP391.41
  12. Transmission Line Fault Location Analysis System Design and Implementation,TP311.52
  13. Research and Application on Production Plan Schema Decomposition and Multi-plant Associated Scheduling Optimization Method,TH186
  14. The System Design of Wave Transmission Line Fault Location Based on NIOS Ⅱ,TM755
  15. Computer network self-diagnostic system Research and Implementation,TP393.06
  16. Fault Localization Technology and Its Practice Based on KBC and Noise Reduction,TP311.52
  17. Intelligent alarm and fault location in the power grid intelligent scheduling for research,TM734
  18. Based GPS_GIS fault breaker Positioning System Design and Implementation,TP368.1
  19. Windowed Lifting Wavelet Packet in Fault Location for Research,TM755
  20. Research on Cable Fault Location Based on Wavelet Analysis and Traveling Wave Combination,O174.22
  21. EMU bogie bearing reliability analysis and fault diagnosis technology research,U269

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