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In the field of video fire detection, traditional fire color models have the poor adaptability and week robustness to interference. Therefore, a new fire detection method referring to the centroid variety of fire in consecutive frames is proposed in this paper. Firstly, the areas similar to fire are detected out through RGB-HIS color model. Then, the centroid movement of these areas are calculated...
A significant attention has been paid to networked control systems (NCS) during the last few years, but few researches take the uncertainty of the controlled plant into account. This paper investigate the robustness of networked control systems with in model parameter perturbation and external disturbance. For robustness of networked control systems with uncertainty, an improved networked predictive...
This paper presents a S-transform effective feature extraction method for power quality (PQ) disturbance classification problem. Firstly, S-transform technique is used to extract the significant features of distorted signal. Then, an optimum combination of the most useful features is identified for increasing the accuracy of classification. Features extracted by using the S-transform are applied as...
DC microgrids are gaining high momentum under the smart grid environment The DC microgrid contains a large number of power electronic devices. These tightly regulated closed-loop converters may cause stability problem of bus voltage when used as a load since they trend to draw constant power and exhibit negative incremental resistance. In this paper, a novel nonlinear feedback technique, which is...
A method based on the D-S (Dempster-Shafer) evidential theory is presented and applied to diagnose the broken rotor bars of induction motors. Wavelet packets decomposition of the three-phase stator current is performed based on the frequency partition characteristics of the wavelet packets transformation; The faults characteristic vector (evidence) of the broken rotor bars is established by the RMS...
In the variable frequency driver system of induction motor, the DC-side current of converters and the AC-side current of rectifiers are analytically analyzed using switching functions of converters and rectifiers when induction motors would be in fault state. The transmission rules of faults characteristic information in driver system were derived, and the fault features frequency components corresponding...
Firstly this paper presents the technical aspects of designing a Dynamic Voltage Restorer (DVR) to meet some stringent requirements of voltage sags mitigation for Micro Integrated Power System (MIPS). Secondly through an analysis of configuration of DVR the optimum energy injection scheme is introduced. Thirdly the principles of a control scheme and a protection circuit for mitigating surge current...
A new method of data interaction between C# program and Simulink model is presented for the power systematic three-dimensional simulated training system. By establishing shared memory to be medi-location of data, Simulink model read or write from share memory through program in S-function. C# program uses Win32 API function to accomplish writing programmed segment for establishing shared memory and...
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