-Superconducting fault current limiter (SFCL) is a kind of short-circuit current limiting device for power grid. It's a new application of superconducting technology on power equipments. Saturated Iron-core Superconducting fault current limiter (SISFCL) is one of many types of SFCL. It takes the advantage that no quenching occurs in superconducting wires during fault current limiting process. The immediately reacting and fast recovering are also its main characteristics. The structure and function of SISFCL is similar to that of traditional transformer and current limiting reactor respectively. Based on mature technologies on design and manufacture of iron core and windings of transformers, SISFCL could be made at the same voltage level as traditional transformers. But there are also significant differences between them. SISFCL will offer an effective solution to limit short-circuit current in future HV or EHV power systems because of its peculiar structures and properties. In this paper, we introduce the structure and characteristics of the SISFCL developed by Innopower. It may help readers to understand SISFCL and its enormous application value for power grids.

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The phenomenon of discharging in twice of underwater wire exploding is discovered-by investigating the time characteristics of pulsed discharging current and voltage. Pictures taking by high-speed shadow photography and streak camera have testified the existence of the phenomenon. Parameters related to the phenomenon are presented in this paper.

The flow and aerodynamic noise of a generic side mirror in high-speed is evaluated using numerical simulation and experiment. The Reynolds number is R e = 5.2 X 105 basing on the mirror diameter. Transient flow field is analyzed by Large Eddy Simulation (LES), two different sub-grid scale (SGS) models named Smagorinsky-Lilly (SL) and Wall Adapting Local Eddy-viscosity (WALE) are used to express the turbulent viscosity. Detailed velocity vectors and pressure fluctuation contours are compared by cut planes in the flow field. Mean and transient pressure are also monitored at several points in the flow field and compared with corresponding experimental data. The sound propagation is predicted by the Ffowcs Williams-Hawkings (FW-H) acoustic analogy where wall pressure fluctuations and pressuretemporal are treated as two source terms. The conclusion is that the SL model is a better candidate for this mirror simulation.