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Compared with traditional AC distribution network, DC distribution network, which stands for future distribution network is suitable for distribution generation (DG) to multiple access. DG access changes the structure of low-voltage DC (LVDC) distribution network, affecting the reliability of relay protection. To eliminate the influence, a protection strategy which is based on Hall DC transformer...
When turning at high speed, multi-axle vehicles are prone to steering shimmy, and even turning out of control and other issues. According to the characteristics that the driving torque of each electric-wheel can be independently controlled, the Direct Yaw Control strategy was proposed to improve the vehicle's steering characteristics. According to vehicle steering characteristics, a yaw rate calculation...
With wind power develops rapidly, there are lots of problems appear when wind power connects grid, of them, the most important thing is reliability. The paper proposes a tree-like four-story evaluation system, which uses fuzzy-AHP as evaluation method. All these form a complete reliability evaluation system in theory. The evaluation system has advantage, which considers the economy as an important...
Data packet capturing and analysis are two of the most important components in the intrusion detection system (IDS). However the speed of data packet capture and analysis doesn't match the network application, which causes a general problem in IDS and the ratio of data packet lost is quite high. Various intrusion detection technologies are widely used to solve this problem. In those technologies,...
In order to reduce the vibration and prevent the resonance efficiently, the vibration character of drive shaft of car has been analyzed by finite element analysis method with SolidWorks software in this paper. Firstly, the model of drive shaft has been established and divided into a certain number of units by means of Simulation plug-ins. Secondly, the three vibration modes, the corresponding displacement...
The idea of meaningful classification of power quality is proposed, the definitions and physical meanings of both continuous and event-based power quality problems are given, and the major differences between them in both the characteristics and time scale are analyzed. In addition, two-level evaluation of power quality based on meaningful classification is presented in the paper. It not only retains...
With the capacity increasing of single wind turbine and the size of wind farm, the generation reliability issues of wind farms become increasingly prominent. Compared with conventional power supply, wind power has strong stochastic volatility. Then the reliability evaluation indices for conventional supply are not suit for wind power. So it is more and more important to research and development the...
With the capacity of single wind turbine and the size of wind farm increasing, the generation reliability issues of wind farms become increasingly prominent. Compared with conventional power supply, wind power has strong stochastic volatility. Then the reliability evaluation indices for conventional supply don't apply to wind power. So it is more and more important to research and development the...
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