Every new technology evolved with minimalism as well as stumbling blocks, as the recent innovations and excessive use of power electronic devices such as, fast switching uncontrolled/controlled converters, invertors and cyclo-converters, high voltage power converters used in HVDC etc. make the system flexible to work but also a complex problem of power quality has evolved, the measure of it was...

Abstract— Power system engineers and design engineers use normalized values for the variables. This paper presents dynamic modeling and simulation of 3-phase induction motor using dq0 axis transformation of normalized stator and rotor variables in the synchronous reference frame assisted by MATLAB/SIMULINK. For this purpose, the relevant electrical differential equations and mechanical differen...

To achieve maximum possible power factor and by keeping total harmonic distortion (THD) within the acceptable limit. A new control algorithm of shunt active power filter under distorted grid voltage and unbalanced supply conditions is proposed. A new control algorithm renders the optimal compromise between harmonic free (HF) and unity power factor (UPF) by keeping the total harmonic distortion ...

In recent years, renewable energy sources have been considered the most encouraging resources for grid and off-grid power generation. This paper presents an improved current control strategy for a three-phase photovoltaic grid-connected inverter (GCI) under unbalanced and nonlinear load conditions. It is challenging to suppress the harmonic content in the output current below a pre-set value in...

This paper proposes a three-phase AC chopper system for the interconnection of various distributed generation (DG) farms or main utilities to enhance the active and reactive power flow control. The absence of large energy storage component in direct AC-AC converter makes the system footprint small and reliable. As the interface for different AC sources, the presented converter can be configured...

To achieve maximum possible power factor and by keeping total harmonic distortion (THD) within the acceptable limit. A new control algorithm of shunt active power filter under distorted grid voltage and unbalanced supply conditions is proposed. A new control algorithm renders the optimal compromise between harmonic free (HF) and unity power factor (UPF) by keeping the total harmonic distortion ...

Active filters have proven to be more effective than passive techniques to improve power quality and to solve harmonic and power factor problems due to nonlinear loads. This paper proposes a control scheme based on the instantaneous active and reactive power. The inverter of this active filter is a three-phase, two-level converter. Space vector technique is used as modulators and pattern genera...

There are hundreds of spatial reference frame (SRF) being applied, and the great difference among SRFs has blocked the share of global data on planet Earth. A conceptual spheroid of radius 12,800km and a spheroid degenerated octree grid method are applied to produce an earth system spatial grid (ESSG), which is of natural characteristics to be applied as a new common SRF. A triple CTA is design...

The SNS SRF system is operated with a pulsed beam. For the SRF system to track the repetitive reference trajectory, a feedback and a feedforward controllers has been proposed. The feedback controller is to guarantee the closed loop system stability and the feedforward controller is to improve the tracking performance for the repetitive reference trajectory and to suppress the repetitive disturb...