KIEE International Transactions on Power Engineering

The Korean Institute of Electrical Engineers (대한전기학회)
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A Study on the Condition Monitoring for GIS Using SVD in an Attractor of Chaos Theory

  • J.S. Kang (Dept. of Electrical and Computer Engineering, Sungkyunkwan University) ;
  • Kim, C.H. (Dept. of Electrical and Computer Engineering, Sungkyunkwan University) ;
  • R.K. Aggarwal (Dept. of Electronic and Electrical Engineering, University of Bath)
  • Published : 2004.03.01
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Abstract

Knowledge of partial discharge (PD) is important to accurately diagnose and predict the condition of insulation. The PD phenomenon is highly complex and seems to be random in its occurrence. This paper indicates the possible use of chaos theory for the recognition and distinction concerning PD signals. Chaos refers to a state where the predictive abilities of a systems future are lost and the system is rendered aperiodic. The analysis of PD using deterministic chaos comprises of the study of the basic system dynamics of the PD phenomenon. This involves the construction of the PD attractor in state space. The simulation results show that the variance of an orthogonal axis in an attractor of chaos theory increases according to the magnitude and the number of PDs. However, it is difficult to clearly identify the characteristics of the PDs. Thus, we calculated the magnitude on an orthogonal axis in an attractor using singular value decomposition (SVD) and principal component analysis (PCA) to extract the numerical characteristics. In this paper, we proposed the condition monitoring method for gas insulated switchgear (GIS) using SVD for efficient calculation of the variance. Thousands of simulations have proven the accuracy and effectiveness of the proposed algorithm.

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References

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