The change in system voltage and frequency with changing load creates problem in power system stability. For the sake of system stability and reliability, the reactive power compensation is essential for flexible AC transmission system (FACTS). The variation of reactive power causes impact on the generating units, lines, circuit breakers, transformers, relays and isolators. However the reactive...

This paper explores the design approach of a low power high performance Multiply and Accumulate (MAC) unit with hybrid encoded Reduced Transition Activity Technique (RTAT) equipped multiplier and low power 0.13μm adder. Design of a low power MAC unit for image processing systems exploiting insignificant bits in pixels values and the similarity of neighboring pixels in video streams is presented...

Photovoltaic power generation system implements an effective utilization of solar energy, but generally has very low conversion efficiency. Maximum power point tracking (MPPT) is used in photovoltaic (PV) systems to maximize the photovoltaic array output power, irrespective of the temperature and irradiation conditions and of the load electrical characteristics. A MPPT system has been developed...

A study on the bipolar-resistive switching of an Ni/SiN/Si-based resistive random-access memory (RRAM) device shows that the influences of the reset power and the resistance value of the low-resistance state (LRS) on the reset-switching transitions are strong. For a low LRS with a large conducting path, the sharp reset switching, which requires a high reset power (>7 mW), was observed, whereas ...

we propose a new ring resonator side-coupled m-z interferometer all-optical switch throughthe pumped nonlinear directional coupler. by controlling pump power p to lead the coupler reflectivityr approaching to 1, the resonator finesse will be enhanced dramatically, and then the minimumswitching power in silica-based practice devices can be obtained. as a sample, we use a nonlinearcoupler made by...

|Gate-sizing is an eeective technique to optimize CMOS circuits for dynamic power dissipation and performance while dual-V th (threshold voltage) CMOS is ideal for leakage power reduction in low voltage circuits. This paper focuses on simultaneous dual-V th assignment and gate-sizing to minimize the total power dissipation while maintaining high performance. An accurate power dissipation model ...

Switching activity is one of the most important factors in power dissipation. This paper studies the scheduling problem that minimizes both schedule length and switching activities for applications with loops. We show that to find a schedule that has the minimal switching activities among all minimum-latency schedules with or without resource constraints is NP-complete. Although the minimum lat...

Abstract— In this paper, we propose a direct/cooperative amplify-and-forward relay (D/AR) switching using a spectrum division/adaptive subcarrier allocation (SDASA) for increasing the uplink capacity of single carrier-frequency division multiple access (SC-FDMA). In the D/AR switching, switching between direct communication and cooperative AF relay is done so that the channel capacity is maximi...

The existence of unreliable renewable energy resources would be required to use energy resources and storage units simultaneously, particularly in applications such as electrical vehicles and stand-alone energy supplying systems. The objective of this paper is to introduce a new topology of multi input converter in hybrid power supply system of photovoltaic, fuel cell and battery for medium pow...