Although active islanding detection techniques have smaller non-detection zones than passive techniques, active methods could degrade the system power quality and are not as simple and easy to implement as passive methods. The islanding detection strategy, proposed in this paper, combines the advantages of both active and passive islanding detection methods. The distributed generation (DG) inte...

This suggested research work provided a distributed generator-based unified power quality conditioner with decreased rating and star-connected transformer as means of enhancing quality. The (UPQC), Y-connected transformer, an LC filter are all included in this work. When the source voltage is out balance, hybrids approach greatly enhance UPQC performance. that here intended to correct issues cu...

This paper has been focused on the problem of analysis of notching occurring in electric power systems. Especially a choice of appropriate sampling frequency and its consequence for results of the analysis have been considered. Moreover, the problem of wavelet filter length and, in some respect, wavelet family has been analyzed as well. All analyses have been based on the real voltage samples, ...

Abstract— Reduction of the Harmonics is one of the major needs for Power System & it is demanded that source should provide a balanced & pure sinusoidal three-phase voltage of constant amplitude to the loads. But, due to excessive use of Power Electronics, a complex power quality problem evolved characterized by the voltage and current harmonics. Active power filters have been developed to solv...

abstract: one the most important problems in recent sensitive loads is the quality of voltage. for this challenge custom power devices are used in distribution systems. dynamic voltage restorer (dvr) is a custom power device that improves voltage, decrease power distortion, filter harmonics and balance distributed generations (dgs) with low voltage distribution system. in this paper, a new algo...

Smart grid puts forward higher requirements for power quality. Power quality evaluation can provide a decision-making basis improvement. Based on monitoring data, grey target method is proposed evaluation. The composed of standard and data to be evaluated. Combining with the characteristics each index, center whole system found. Then, evaluated mode are compared analyzed construct correlation d...