Power quality becomes one of the significant contemplations in power system. It has become particularly with presentation advanced devices. These high-level devices are sensitive to nature supply. The refers voltage, current, and frequency at evaluated value. If any variation occurred these quantities standard rating is considered as problem. issues like loss sine, voltage sag, swell, short int...

This paper expounds the influence of decentralized wind power on characteristics distribution network. Through analysis, it can be concluded that after installing an appropriate amount power, voltage level load bus improved. The flow will changed, and network loss grid reduced. has also brought about negative impacts, such as flicker harmonics, impact scope direction protection relay protection...

An electric arc furnace (EAF) is known as nonlinear and time variant load that causes power quality (PQ) problems such as, current, voltage and current harmonics, voltage flicker, frequency changes in power system. One of the most important problems to study the EAF behavior is the choice of a suitable model for this load. Hence, in this paper, a probabilistic three-phase model is proposed base...

We investigated the interactions between flicker thresholds and luminance pedestals using threshold versus contrast (TvC) and method of constant stimuli paradigms. High amplitude luminance pedestals were found to elevate flicker thresholds, but low amplitude luminance pedestals were unable to reduce flicker thresholds. Luminance pedestals elevated flicker thresholds more at low temporal frequen...

Due to the dynamic nature of load changes, arc devices are receivers that generate disturbances network affect power quality. The main disturbance generated by these voltage fluctuations. One effects fluctuations is flicker light caused lighting receivers. article presents an analysis changes indicators measured in networks supplying furnaces. propagation lines was analyzed. parameters influenc...

A flicker-free resonant LED driver with high power factor (PF) and passive current balancing is proposed analysed in this paper. The are composed a buck correction (PFC) unit dc-dc by sharing an active switch. Based on topology, the low output ripple can be achieved via small voltage bulk capacitor fast voltage-mode control loop. By charge balance for capacitor, of each string balanced. In half...

This thesis deals with the analysis, modeling, and control of the doubly-fed induction generator (DFIG) for wind turbines. Different rotor current control methods are investigated with the objective of eliminating the influence of the back electromotive force (EMF), which is that of, in control terminology, a load disturbance, on the rotor current. It is found that the method that utilizes both...

PURPOSE Visual flicker induces a response in human optic nerve blood flow (F(onh)) and inner retinal activity, as assessed by laser Doppler flowmetry and electroretinogram (ERG), respectively. In this study the relationship was examined between the flicker-evoked changes in F(onh) (RF(onh)) and ERG when various parameters of the stimulus were varied. METHODS In five normal observers (mean age...