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Fault Detection for a Class of Impulsive Switched Systems

International Journal of Automation and computing 2014年第2期11卷 223-230页

作者： Qing-Yu Su Yan-Cheng Li Xing-Ze Dai Jian Li School of Automation Engineering Northeast Dianli University

The problem of fault detection for a class of nonlinear impulsive switched systems is investigated in this paper. Fault detection filters are design.d such that the augmented systems are stable, and the residual error signal generated by the filters guarantees the H∞ performance for disturbances and faults. Sufficient conditions for the design.of fault detection(FD) filters are presented by linear matrix inequalities. Moreover, the filter gains are characterized according to a solution of a convex optimization. Finally, an example derived from a pulse-width-modulation-driven boost converter is given to illustrate the effectiveness of the FD design.approach.

关键词： Impulsive switched systems fault detection(FD) H∞ performance dwell time filter design.

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Optimum design.of Passive Shunt filters for Power Distribution Networks

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Journal of Energy and Power Engineering 2013年第11期7卷 2129-2137页

作者： Sobhy Mohamed Abdelkader School of Electronics Electrical Engineering & Computer Science Queen's University Belfast Belfast BT9 5AH UK

Static, passive, filters present an economic and simple solution to the harmonic distortion at the distribution level and at the same time supply the required reactive power for voltage support and/or power factor correction. Applying these filters to a distribution network, if not properly design.d, may have an adverse effect on the network. This paper presents analysis of the effects of using passive harmonic filters in a power distribution networks. The driving point impedance at the node where the filter installed, as a measure of how harmonic currents would produce harmonic voltages, is determined as function of the filter parameters. Hence, effects of filter parameters on the system impedance, parallel resonant frequency and impedance at resonance are illustrated. The effects of using more than one filter are also examined. A method for the optimal design.of a passive filter considering the component limits, harmonic distortion limits and parameter tolerances is also presented. The proposed optimization model has proved its effectiveness through application to measurements at a real distribution feeder.

关键词： Power quality harmonics filter design.

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