论文信息 - Power Transformer Protection by Using Fuzzy Logic

Power Transformer Protection by Using Fuzzy Logic

Power transformer protective relay should block the tripping during magnetizing inrush and rapidly operate the tripping during internal faults. Recently, the frequency environment of power system has been made more complicated and the quantity of 2nd frequency component in inrush state has been decreased because of the improvement of core steel. And then, traditional approaches will likely be maloperated in the case of magnetizing inrush with low second harmonic component and internal faults with high second harmonic component. This paper proposes a new relaying algorithm to enhance the fault detection sensitivities of conventional techniques by using a fuzzy logic approach. The proposed fuzzy-based relaying algorithm consists of flux-differential current derivative curve, harmonic restraint, and percentage differential characteristic curve. The proposed relaying was tested with MATLAB simulation software and showed a fast and accurate trip operation.

[1] Kuniaki Yabe,et al. Power Differential Method for Discrimination between Fault and Magnetizing Inrush Current in Transformers , 1996 .

[2] D. W. Nicoletti,et al. A wavelet-based differential transformer protection , 1999 .

[3] Zoran Obradovic,et al. Training an artificial neural network to discriminate between magnetizing inrush and internal faults , 1994 .

[4] Ali Saberi,et al. Filtering theory , 2007 .

[5] A. Wiszniewski,et al. A multi-criteria differential transformer relay based on fuzzy logic , 1995 .

[6] Eugeniusz Rosolowski,et al. A self-organizing fuzzy logic based protective relay-an application to power transformer protection , 1997 .

[7] M.A. Rahman,et al. A Stand-alone Digital Protective Relay for Power Transformers , 1991, IEEE Power Engineering Review.

[8] Michel Meunier,et al. A transformer model for winding fault studies , 1994 .

[9] I. F. Morrison,et al. A Proposed Method of Harmonic Restraint Differential Protecting of Transformers by Digital Computer , 1972 .

[10] J. Thorp,et al. A New Computer-Based Flux-Restrained Current-Differential Relay for Power Transformer Protection , 1983, IEEE Transactions on Power Apparatus and Systems.

[11] W. J. Smolinski,et al. Design and implementation of a digital differential relay for a 3-phase power transformer based on Kalman filtering theory , 1988 .