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One of the aims of the “Postes Intelligents” project is to design, test and commission a protection and control system using IEC 61850 process bus both for the data acquisition of the protection functions and for tripping. This paper describes the findings and the experience feedback of tests of complete digital functional chains of distance- and differential line protection. The test set includes...
The polar discontinuity [1] and electronic reconstruction at the interface of SrTiO3 and GdTiO3 leads to a unique high two dimensional electron gas (2DEG) of 3×1014 electron/cm2[2], that is exactly half of the number of unit cells at the interface. The ability to modulate this high charge density could enable a new class of oxide electronics and plasmonics devices that harness extreme charge density...
Substation automation solutions have been progressively migrating to higher levels of digital technology over the past decade or more, as IEC 61850 has gained ground globally. The technology available today makes fully digital substations feasible — at the process level as well as the station level. Digital substation implementation allows the lifetime total cost of ownership of the substation to...
We report on the first high electron density SrTiO3/GdTiO3 (STO/GTO) heterostructure field effect transistors (HFETs). Recently, there has been great interest in high density 2DEGs formed at the interfaces between perovskite oxides [1]. In particular, the STO/GTO interface has been shown to have a sheet charge density of 3 × 1014 cm−2, equivalent to 0.5 e− per unit cell [2], due to the polar discontinuity...
Rigid link manipulators have attracted more and more attention from robot control theorists and robot users because of its various potential advantages. However, their nonlinear dynamics present a challenging control problem, since traditional linear control approaches do not easily apply. For a while, the difficulty was mitigated by the fact that manipulators were highly geared, thereby strongly...
Focused ion beam technique is a powerful tool for defining patterns within a semiconductor film. In this paper, we show that it is possible to realize patterns such as disks and columns within thick GaN templates and that it is compatible with the regrowth of GaN based heterostructures. We study the effect of the pattern size and shape on the regrowth by molecular beam epitaxy. We show that the growth...
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