In the last few years the power quality has become the target of many researches carried out either by academic or by utility companies. Moreover, a desired good power quality is essential for the Power Distribution System (PDS). The PDS can have (or impose) inherent operational conditions, that affect frequency and three-phase voltage signals. Among the main disturbances that indicate a poor p...

1. INTRODUCTION Series of individual images in a movie clip called frames. When these images are shown rapidly in succession, a viewer has the illusion that motion is occurring. The viewer cannot observe the flickering in a movie clip due frame continuation is known as persistence of vision. It is due to eye retains on a visual image for a fraction of a second after the source has been removed....

Purpose To mathematically model the temporal dynamic responses of retinal vessel diameter (D), oxygen saturation (SO2), and inner retinal oxygen extraction fraction (OEF) to light flicker and to describe their responses to its cessation in humans. Methods In 16 healthy subjects (age: 60 ± 12 years), retinal oximetry was performed before, during, and after light flicker stimulation. At each ti...

The sun-fish Lepomis responds to a moving system of stripes by a motion of its body. By changing the velocity of motion of the stripe system different flicker frequencies can be produced and thus the relation of flicker frequency to critical intensity of illumination can be studied. Threshold illumination varies with flicker frequency in such a way that with increasing flicker frequency the int...

Abstract The voltage fluctuation and flicker level are important indicators for evaluating power quality. Correct identification of sources can effectively help to improve To solve the problems insufficient accuracy lack propagation path analysis in current source location research, a method based on wide-area information is proposed. Based frequency-amplitude binary characterization, main comp...

This paper introduces the concept of risk applied to light flicker. It offers a novel stochastic assessment flicker produced by voltage fluctuations from devices in household. The has contributed with models patterns several household devices. severity been determined based on perception generalized LED lamp using an index defined as factor, what is contrast incandescent considered IEC 61000-4-...

Non-linear loads are commonly present in industrial facilities, service facilities, office build‐ ings, and even in our homes. They are the source of several Power Quality problems such as harmonics, reactive power, flicker and resonance [1-3]. Therefore, it can be observed an in‐ creasing deterioration of the electrical power grid voltage and current waveforms, mainly due to the contamination ...

original article   mental fatigue (mf) is considered as a contributor factor in incident, even catastrophic one. electroencephalography measurement has been the most acceptable method to assess mf by neurologists. however, this method could be hardly feasible in real work setting. flicker fusion device, by contrast, is more usable at work setting. the purpose of this study was to compare the cr...

Solid-state transformer (SST); Medium frequency transformer; AC/AC converter; Matrix converter Abstract This paper presents a novel topology of solid-state transformer (SST). In the design process, the AC/DC, DC/AC and AC/AC converters have been integrated to achieve higher efficiency. To obtain higher efficiency from other SST with DC-link topologies, the AC/DC and DC/AC converters have been i...

Renewable energy sources are alternative energy source, can bring new challenges when it is connected to the power grid. Generated power from wind energy system is always fluctuating due to the fluctuations in the wind. According to the guidelines specified in IEC61400 standard (International Electro-technical Commission) provides some norms and measurements. The performance of the wind turbine...