The loss of synchronization (LOS) is a main issue for dynamic behavior grid-following converter (GFC) under inductive power grid. This letter reveals the underlying mechanism insufficient damping or even negative during grid disturbance, and analyzes how initial speed angle-difference between PLL output voltage affects stability. Then stability enhancement scheme to add positive reverse angular...

In this paper, we investigate Residue Number System (RNS) to decimal conversion for a three moduli set with a common factor. We propose a new RNS to binary converter for the moduli set {2n + 2, 2n + 1, 2n} for any even integer n > 0. First, we demonstrate that for such a moduli set, the computation of the multiplicative inverses can be eliminated. Secondly, we simplify the Chinese Remainder The...

In this study, the authors propose a non-isolated high step-up interleaved DC/DC converter that can be applied to sustainable energy system. The proposed achieves voltage gain by applying coupled inductor and switched capacitor method based on an boost converter. two inductors connected in parallel with input side have distinct structure. Specifically, single has primary secondary series output...

Recent experiments have shown interactions between the cavitation and fluid vortex formation in a hydrodynamic torque converter. This study aimed to clarify unsteady trigger mechanism flow-induced vibration caused by turbulence–cavitation interactions. The mass transfer model modified Reynolds-averaged Navier–Stokes k–ω were used with local density correction for turbulent eddy viscosity invest...

The switching loss of the secondary side rectifiers in LLC resonant converters can have a noticeable impact on overall efficiency complete power supply and constrain upper limit optimum frequencies converter. Two are main contributions to rectifiers: one hand, reverse recovery (Qrr), most noticeably while operating above series frequency; other output capacitance (Coss) hysteresis loss, not pre...

In this paper, a novel high step-up DC-DC converter is proposed for sustainable energy system. The proposed converter uses coupled inductor and switched-capacitor technique. The capacitors are charged in parallel and are discharged in series by the coupled-inductor to achieve high stepup voltage gain with appropriate duty ratio. Besides, the voltage stress on the main switch are reduced with a ...

High efficiency DC-DC converters with high-voltage gain have been researched due to increasing demands. A soft-switching single-ended primary inductor converter (SEPIC) is presented in this work. An auxiliary switch and a clamp capacitor are presented in this project. A coupled inductor and an auxiliary inductor are utilized to obtain ripple-free input current and achieve zero voltage-switching...

this paper presents a control strategy for fuel cell/energy storage power generation system during voltage sag conditions. the hybrid dc power sources are connected to grid using power electronic converters include dc-dc converter and grid connected voltage source inverter. the power from hybrid power sources is controlled during voltage sag by designing of control strategy for dc-dc converter....

in this paper, a novel approach for control of the dc-dc buck converter in high-power and low-voltage applications is proposed. designed method is developed according to state feedback linearization based controller , which is able to stabilize output voltage in a wide range of operation. it is clear that in high-power applications, parasitic elements of the converter may become comparable with...

active filters have proven to be more effective than passive techniques to improve power quality and to solve harmonic and power factor problems due to nonlinear loads. this paper proposes a control scheme based on the instantaneous active and reactive power. the inverter of this active filter is a three-phase, two-level converter. space vector technique is used as modulators and pattern genera...