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The increasing scale and capacity of power grid will lead to the increase of short-circuit current (SCC) level of the buses, which poses threats to the safe and stable operation of power grid. This paper proposes a dynamic partitioning technology for dynamically adjusting power grid partition structure by means of line-switching and load-transferring aiming at the problem of excessive SCC of buses...
Communication system provides technical support for observability and controllability of Wide-Area Power System. However, communication faults such as time delay. bit error and interruption may lead to abnormal operation, sometimes even causing cascaded failure in electric power system. Therefore. it is important to perform the vulnerability assessment of electric power and communication system in...
Under the new historical condition, strengthening the communication and popularization of science and technology is both the requirement to implement the national development strategy and need for social development as well as the basis and key point for the development of popularization of science itself. Relevant data of five characteristic indexes, talents, funds, place, communication and activity...
An index was proposed to assess wind power system reliability considering grid voltage sag and low voltage ride through (LVRT) ability of wind turbines. The index could quantify the impact of grid voltage sag and LVRT ability of wind turbines on output of wind power. Then the index was calculated in IEEE-RTS79 system by typical wind farm reliability model and Monte Carlo Simulation. The results verified...
In the field of machine learning, it is a key issue to learn and represent similarity. This paper focuses on the problem of learning similarity with a multikernel method. Motivated by geometric intuition and computability, similarity between patterns is proposed to be measured by their included angle in a kernel-induced Hilbert space. Having noticed that the cosine of such an included angle can be...
New applications such as real-time deep packet inspection require high-speed regular expression (regex) matcher, and the number of regexes in pattern store is increasing to several thousands, which requires a memory efficient solution. In this paper, a kind of hardware based compact DFA structure for multiple regexes matching called CPDFA is presented. According to statistics of regexes in Snort and...
This paper first analyzes the Park transform and Clarke transform of 5 normal power quality disturbances and then proposes 3 characteristic indexes based on the two transforms. The indexes can be used to classify 5 single disturbances and 5 mixed disturbances exactly. The algorithm is simple and easy to be implemented by hardware. It can also be the basis of power quality index evaluation. At last,...
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