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This paper introduces a wideband transformer partial discharge (PD) online monitoring system which can be used under the substation environment. It consists of wideband current sensors, amplifiers, filters, a digital oscilloscope and a computer. The wideband current sensors' measuring ranges from 20kHz to 40MHz; the signal amplifiers' frequency bandwidth is 0 ∼ 100MHz, the signal gain of it can reach...
There are small amounts of bad data in power system real time data. If we do not correct them, they will have impact on security and stability of the power system. This text put forward a bad data correction algorithm based on genetic neural network algorithm. In order to overcome the BP neural network's own defects, we use the genetic algorithm to define the optimum structure and the best initialized...
With the continuous increasement of the number of graduates in higher institutions in China, it is difficult to manage all the graduates only by graduates management of the higher institutions, so some management models,such as double-level management system and three main quality management model, are raised. These management models can improve the efficiency of management, but they treate the graduates...
Bush is one of raw material for biomass fuel in China. Crank speed is an important parameter in the design of bush reciprocating cutter. A reciprocating single blade cutting test equipment was made in this paper. One factor test was done to study its influence on maximum cutting force of bush. Other tests were done to study the interaction of cutting edge angle and crank speed, as well as sliding...
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