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Microstructure quantitatively analysis is significant for building the relationship between microstructure and properties, especially the ageing precipitation kinetics in aluminum alloys. In the present paper, a core parameter (aspect ratio) was introduced to describe the morphology change of precipitation. Aspect ratios of T1-plate precipitates in Al-Cu-Li-Zr alloys, S-plate precipitates in Al-Cu-Mg...
Intermittent earth faults occur frequently in urban distribution networks, causing overvoltage in the whole system. This paper first presents the distribution characteristics of transient overvoltage caused by intermittent earth faults. Overvoltage level at the end of a sound line turns to be higher than that of the faulted line. In resonant grounding system with Petersen coil based on thyristor controlled...
To improve the “substation owner” control mechanism and support the conversion of substation operation and maintenance (O&M) operators to “substation owner”, in this paper, an architecture of substation dashboard oriented to O&M center is designed, which brings about integration of multiple O&M systems and collaborative operations of substations. A unified information platform is established...
To improve the operation and maintenance (O&M) efficiency and equipment management, CSG developed a cockpit system used in O&M centers. This system is an integrated platform for O&M of substations. It integrates multiple disciplines, provides a unified information platform, standardizes all service interfaces, and coordinates all the services. This way, it provides one-stop support for...
Fault prediction for power equipment allows the maintenance personnel to know the operation conditions and the fault to be occurred in advance so as to reduce the risk of fault and the economic loss. The current fault prediction methods are generally based on physical model or stochastic model, which are used to evaluate the remaining life of equipment. However, in fact, there are many interference...
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