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The Vacuum Circuit Breakers (VCBs) are typical types in the medium voltage distribution switches, and the internal pressure (P) in the vacuum interrupters affects the working quality and life. With the development of national smart power grids and the maintenance system based on reliability, on-line monitoring of the internal pressure in the vacuum interrupters becomes necessary and urgent. With the...
The reliability and intelligence of vacuum circuit breakers related to the digitization of the substations directly, however, the internal pressure in vacuum interrupters (VIs) is an important indicator parameter of the breaking capability and life. To realize the On-line condition monitor of VIs' internal pressure, weighting the domestic and international on-line monitoring method, we select the...
Potential on middle shield of vacuum interrupter is one of techniques to determine the degradation of pressure in vacuum interrupters. Extensive research on the component of the shield potential and the cause of its conformation was done, certain results were obtained in theory and experiments. However, among multiple interpretations in causes of interrupter shield potential, there are still no accepted...
To improve the intelligence and reliability of the vacuum circuit breakers in power gird, a high accurate smart system was designed for On-line condition monitor of vacuum interrupters inner pressure. Through the study of dielectric theory and exploration of the inherent laws of shield potential with different pressure in VIs, it shows that with the deterioration of internal pressure the AC component...
Lots of studies have focused on the structure and function of high-quality human metabolic networks. Recently, hub-based centrality is used to analysis of human metabolic network core. However, it is clear that this specific centrality measure is not sufficient alone. In the present paper, by comparing 10 different centrality measures with their application to human metabolic network core, be similar...
Vacuum circuit breakers (VCBs) have operated successfully in medium voltage distribution system to control and protect power lines and power equipments. Once a VCB is unable to interrupt or make current as designed, heavy losses would be brought about to both the power system and the consumers. Inner pressure of vacuum interrupts (VI) is one of the most important parameters for VCBs' safe and steady...
AODVjr (AODV junior) is a simplified specification of AODV (ad hoc on-demand distance vector) routing protocol and suitable for ZigBee network. To enhance its routing strategy in a ZigBee network, in this paper, we proposed an AODVjr routing protocol with multiple feedback policy by means of processing main message during route discovery. The source node starts the route discovery, the destination...
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