A Test Rig for Smart Substation Training System

Abstract

The concept of smart substations has been widely used in power systems. Since the variation in interfaces and communication manner, the operating& maintenance methods for smart stations have changed a lot compared with the traditional substations. In this paper , a training system based on virtual substation primary equipment combined with real secondary devices is developed for accident management and operating work in smart substations. The training system is also used to test the relay protection algorithms、Ethernet switch functions、fault recorder actions ,and so on.

Study of Preparation Technology and Properties of Silver Based Electric Brush Materials

“…In high requirement application area, such as vehicle CD/DVD spindle motor, computer spindle motor, and medical industry motor area, usually used Ag alloy and Au alloy to produce commutator, and the matched electric brush tablets is usually using AgPd alloy [11][12][13]. Put these precious metals composite on copper or copper alloy based material surface, to make layer shaped composites, could not only reduce cost, but also gives better mechanical performance for the components [14].…”

“…In order to maintain the sufficient contact pressure during the working process, the baseband under mechanical load need to have good elasticity, strength and resistance to stress-relaxation properties. Therefore, usually used the hot rolled method to make AgPd/BZn laminated composites brushes [12], in order to simultaneously meet the requirements of comprehensive mechanical properties and electrical contact performance.…”