Dissertation > Excellent graduate degree dissertation topics show

Oscillatory Fault Location of Multi-Loop Process Systems

Author: HuJuDa
Tutor: YangMaYing
School: Zhejiang University of Technology
Course: Systems Engineering
Keywords: loop oscillation signed digraph correlation function fault location
CLC: O231
Type: Master's thesis
Year: 2011
Downloads: 19
Quote: 1
Read: Download Dissertation

Abstract


The problem of process oscillatory fault location is about studying how to find the source of fault quickly and effectively when plant-wide oscillatory disturbances appear in the multi-loop system. The contribution of this thesis is to locate the position of process fault and to provide information support for further maintenance and protection.With the expansion of process systems and requirement of high reliability, the technology of fault detection and diagnosis has developed from the study of sing-loop system to multi-loop systems. As an important part of the fault detection and diagnosis technology, oscillatory fault location of multi-loop process systems has drawn more and more research attention. Because of the large-scale and complex relation of multi-loop systems, the appearance of system fault will enlarge the influence range, especially when oscillation appears, plant-wide disturbance will affect the production process and product quality seriously.For this reason, the study of reasonable and effective method of oscillatory fault location in multi-loop process systems is necessary. In this thesis we studied the problem of oscillation-propagation systematically with the tool of signed digraph in graph theory, and proposed a new concept called control-loop rooted tree and a new fault location technique. In the end, arithmetic of this method was given and simulation tests showed the effectiveness of the approach.The main contents and results of this paper are as follows:1)We overviewed the research of oscillatory fault detection and diagnosis, analyzed the features of multi-loop oscillatory fault propagation, and explained the difference of some fault location methods.2)We introduced the concept of control-loop digraph, and analyzed the graph with matrix tool and set theory. Then we proposed an improved strict digraph method, and put forward the location arithmetic of this method.3)A method to identify the propagation path of plant-wide oscillation was proposed, which is based on control-loop rooted tree. And we gained the topology structure of loop nodes with the study of control-loop relations.4)A new method of oscillatory fault location based on the combination of control-loop rooted tree and correlation function was proposed. And we gained a location arithmetic which can find the source of oscillation-fault effectively. In the end, the simulation demonstrated that the approach in this paper is effective.

Related Dissertations

  1. Fault Localization Method for Distribution Network Based on Fault Indicators,TM711
  2. Computer network self-diagnostic system Research and Implementation,TP393.06
  3. Fault Localization Technology and Its Practice Based on KBC and Noise Reduction,TP311.52
  4. Intelligent alarm and fault location in the power grid intelligent scheduling for research,TM734
  5. Based GPS_GIS fault breaker Positioning System Design and Implementation,TP368.1
  6. Windowed Lifting Wavelet Packet in Fault Location for Research,TM755
  7. Research on Cable Fault Location Based on Wavelet Analysis and Traveling Wave Combination,O174.22
  8. Metal Mine Stope Safety Warning and Control Technology,TD76
  9. On-chip bias spatial correlation non-parametric estimation method,TN405
  10. Study on Series Compensated Transmission Lines Accurated Fault Location Based on Distributed Parameter Model,TM773
  11. Neural network based on the S transform fault of the autistic through line ranging,TM72
  12. Generator stator winding single-phase ground fault of digital simulation and traveling wave positioning,TM303.3
  13. Research on Fault Location of 10kV Countryside Power System,TM732
  14. Study on Selective of Short-circuit Protection of Mine High Voltage Network Based on Traveling Wave Test,TM773
  15. Study on Fault Location of High Voltage Transmission Line Based on Hilbert-huang Transform,TM762.25
  16. Fast Service Restoration Object to Least Outage Cost of Distribution System under Situations of Distribution Automation,TM76
  17. Study On the Technology of Fault Location in High Voltage Measurement to Distribution Network,TM862
  18. Research on the Space-time Correlation Characteristics of Vector Noise Field in Boundary Conditions,TB52
  19. Research on the Paired Carrier Multiple Access Technique in Satellite Communication Systems,TN927.23
  20. ± 800kV UHVDC Transmission System commutation transformer internal fault identification and location,TM407
  21. DC Power Transmission Line Traveling Wave Fault Location System,TM855

CLC: > Mathematical sciences and chemical > Mathematics > Control theory, information theory ( mathematical theory ) > Cybernetics ( control theory, mathematical theory )
© 2012 www.DissertationTopic.Net  Mobile