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In this paper, an integrated fault diagnosis method is proposed to deal with fault location and propagation path identification. A causality graph is first constructed for the system according to the a priori knowledge. Afterward, a correlation index (CI) based on the partial correlation coefficient is proposed to analyze the correlation of variables in causality graph quantitatively. To achieve accurate...
This study is aimed at a microgrid composed of inverters. During autonomous operation of microgrid, every DG participates in the regulation of the voltage amplitude and frequency, while the change of the load power occurs. In this paper the virtual power droop control is adopted and virtual impedance is added to inverters. The small signal model of the microgrid system in autonomous operation is established...
The ultrasonic measurement technology is widely used in the detection of impact points. However, most of the existing researches apply only to this case where the flying trajectory must be vertical to the target screen. Otherwise there exists large measurement error. In this paper, a mathematical model for projectiles shooting in any direction based on sensors distributed stereoscopically is put forward...
Under the electricity market environment, when the power supply of distribution network is feed from several substations which power purchase prices are different, the optimal reconfiguration topology cannot depend upon the object of minimum network power losses. This paper proposes a reconfiguration algorithm which considering the minimal power supply cost or maximal benefit else. Associate a refined...
With the continuous growth in the number of available Web news sites and the diversity in their presentation of content, there is an increasing need in mining the news correlation on the Web to keep tracking of successive development of specific event. In this paper a new approach of topic tracking of Chinese news Web pages is presented. Temporal information extracted from news texts and "key...
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