This paper addresses the transient stability of grid-forming (GFM) inverters when transitioning from islanded to grid-connected mode. It is revealed that reconnection GFM main grid can be equivalent a step change active power reference, whose impact closely related with local load, reference inverter, and short-circuit ratio (SCR) grid. Such disturbance may cause lose synchronism To avoid loss ...

The dynamics of the CN‒-ligated ferric cytochrome c (CytcCN) in D2O at 283 K following Q-band photoexcitation at 575 nm was observed using femtosecond time-resolved vibrational spectroscopy. The equilibrium vibrational spectrum of the CN stretching mode of CytcCN shows two overlapping bands: one main band (82%) at 2122 cm‒1 with 23 cm‒1 full width at half maximum (fwhm) and the other band (18%)...

Abstract The increasingly popular inverter distributed generation in microgrids is leading to changes system fault characteristics. behaviors of are closely related the control mode. Here, a photovoltaic power supply constant mode enters low-voltage ride-through state when there microgrid. output current phase analyzed, and local protection method based on difference feeder positive-sequence pr...

introduction: transient cavitations induced by low frequency irradiation of ultrasound can be used to treat tumors. previous studies in in-vitro experiments have shown that induced cavitation by dual or multiple frequencies of ultrasound is greater than induced cavitation by single frequency irradiation. in this study, we compared and evaluated the treatment effects of dual frequency irradiatio...

This paper describes a four quadrant, 250kW(550V, 450A) switch-mode, zero current soft switching (ZCS) power converter for a 1.4 GeV beam transfer line magnet. The ZCS technique is the preferred approach for the high power switch-mode converters employing Insolated Gate Bipolar Transistors (IGBT) to reduce switching losses and EMI. This switch-mode power converter topology has been selected bec...