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With the increasing coupling of secondary system components in smart substation, the operation management becomes more and more difficult. This paper proposes a graphical display approach of secondary functional components based on “information-event-function” logics. The displayed layout as well as connection relationship, which is accomplished through automatic graphing, clearly describes the logical...
Turnout is a weak link in railway track and its structure is complex, so it is necessary to use advanced technology to monitor rail damage of the turnout zone. This paper studied on various existing monitoring methods, and integrated three methods to realize the compound monitoring of rail damage, i.e. fiber grating, optical imaging and Lamb guided wave. Both the relation between parameters of these...
Application of the short circuit capacity (SCC) for voltage stability analysis and monitoring is proposed in this paper. By analyzing the SCC supplied from grid side and the critical SCC needed by the load side, the voltage stability status of power system can be quantitatively assessed. Therefore, a SCC-based voltage stability index and load margin are utilized to perform the voltage stability monitoring...
With the development of sensor and measurement technology, more and more parameters are monitored to assess power transformer condition. Different parameters may reflect different aspects of transformer insulation and the same parameter diagnosed by different methods may get different results. Facing such a complex transformer system and so much online and offline data, the most important thing is...
Power gating (PG) and body biasing (BB) are popular leakage control techniques at microarchitectural level. However, their large overhead prevents them from being applied for active leakage reduction. The overhead problem is further magnified by temperature and process variation, leading to the “corner case leakage control” problem. This paper presents an Adaptive Light-Weight Vth Hopping technique...
Multiple-prerequisite graph (MP graph) is a type of attack graph that has been developed to help defending large scale enterprise network. As a middle-level attack graph, it has its unique advantages. However, quantitative security evaluations based on MP graph has not been proposed yet. In this paper, we present two stochastic models for quantitative security evaluation using MP graphs. These models...
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