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This paper is concerned with the present situation of grounding device in large scale power plant and power substation. We discuss high voltage transmission line with its mathmatic model. Base on the concluded linear model, a new grounding method is proposed for improving the damping performance of low frequency oscillation. The simulation result validates the effectivity of the presented method.
To deal with potential risk existing in railway crossings, a new type of dual intelligent safety alarming system based on PLC is studied and presented in this paper. This system can receive signals of running direction and location of trains and guarantee safety of passing vehicles and pedestrians by means of giving alarms with light and sound. Finally, the feasibility and effectivity is illustrated.
In order to take full advantage of interconnected power system, a new distribution mode of AGC adjustment responsibility is proposed to pursue better frequency quality. Under this distribution mode, various areas AGC can adjust the entire electrical network power together according to the proportion to the same direction the load variety, regardless of whether the load change occurs in the home area...
In perspective of breeding high-yield hybrid pepper varieties, combining ability analysis of net photosynthesis rate at different phases of flowering and fruit setting in pepper was made with 15 cross combinations from 6 parents by (1/2) n (n-1) diallel crosses. There are relatively large differences not only in general combining ability (GCA) effect among different parents and at different phases...
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