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This paper proposes a time-domain technique in order to meter the power quantities of three-phase systems that are contained in IEEE Standard 1459-2000. The proposed method does not need the spectral analysis which is the base of time-frequency methods. It is based on a recursive implementation of the Park and Clark transformations that are employed to obtain the fundamental components of voltage...
This paper will present a single-phase harmonic filter including variable passive part. The passive part employs a variable inductor with a rotational magnetic core whose position is controlled in a closed-loop control system. The design of the inductor and analysis of its impedance change caused by positioning a movable element are carried out by using the finite element method. The aim of this scheme...
The orthometalated complex [Pd(μ-Cl)(C6H5C6H4C(O)CHPPh2C6H4-κ2-C,C)]2 (1) was prepared by refluxing in MeOH/CH2Cl2 equimolecular amounts of Pd(OAc)2 and (Ph)3PCHCOC6H4-Ph-4 (=PhBPPY) followed by addition of excess NaCl. Complex 1 reacts with 4-picoline to give the mononuclear derivative [Pd(PhC6H4COCHPPh2C6H4)(4-picoline)] (2) whose crystal structure has been determined by X-ray diffraction. The precursor...
This paper presents the design of a new hybrid filter for quality improvement of power systems in unbalanced conditions. This filter includes a variable passive filter in parallel with an active filter. The passive part is designed with a varying inductance to reduce the rating of the active part. By using this proposed filter it is possible to compensate for the current harmonics and unbalanced loads...
This paper presents the design of a variable inductor with a rotational magnetic core whose position is controlled in a closed-loop system. This magnetic structure facilitates the impedance changes which may be used for load balancing, harmonics elimination, transient response improvement, and as a controlled reactor in static VAr compensation (SVC). The design of the inductor and analysis of its...
This paper presents a new scheme for parallel hybrid power filter with variable passive part. The proposed model uses a current variable inductor in passive part designed by the software of finite elements method (FEM). The aim of this scheme is reducing power rating of active part of hybrid power filter. To evaluate its performance, this method is simulated by using MATLAB Simulink power system toolbox...
Review of electric energy consumption in different countries shows that electric motors are among the most intensive electricity consumer equipments. Statistics indicate that about two third of industrial electricity in Iran is consumed through motor driven systems. Thus, it seems that these consumers would have considerable potential for energy conservation. In order to promote energy efficiency...
This paper presents an adaptive hysteresis band current controller applied to hybrid power filters to compensate harmonics and the reactive power of a nonlinear load. This method changes the hysteresis bandwidth according to modulation frequency, supply voltage, dc capacitor voltage and slope of the reference compensator current wave. The hysteresis band current controller determines the switching...
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