Enrique Acha

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This paper presents a novel approach in the tuning of phase-locked loops (PLLs) for power electronic converters. PLLs are implemented inside a higher level controller to estimate the grid-voltage phase angle and then control the energy transfer between the power converter and the AC mains. The tuning of the PLL is not a trivial task, particularly when(More)
Electric power systems are among the greatest achievements of the last century. Today, important issues, such as an ever-increasing demand, the flexible and reliable integration of distributed generation or a growth in disturbing loads, must be borne in mind. In this context, smart grids play a key role, allowing better efficiency of power systems. Power(More)
This paper deals with modeling and simulation of SVC in IEEE 14 bus System with Induction Motor load for avoiding voltage sag. Single phase to ground fault is applied in predominant Induction motor load bus for voltage sag analysis. The effect of reactive power compensation to prevent sag has been analyzed with and without SVC. Simulations of the SVC were(More)
This paper presents a control system for a DSTATCOM with which to compensate the voltage sags, unbalanced voltages and voltage harmonics caused by unbalanced loads and nonlinear loads, which can be use to enhance the power quality in smart grids. The compensation of the voltage sags is carried out by injecting reactive power, while the voltage harmonics and(More)
This paper presents a control system based on a repetitive controller to compensate key power-quality disturbances, namely voltage sags, harmonic voltages and voltage imbalances, using a Dynamic Voltage Restorer (DVR). The control scheme deals with all three disturbances simultaneously within a specified bandwidth. The control structure contains a(More)
This paper deals with modelling and simulation of STATCOM in IEEE 14 bus System with Induction Motor load for avoiding voltage collapse. Three Phases to ground fault is applied in predominant Induction motor load bus for voltage collapse analysis. The effect of Critical Fault Clearing Time [CFCT] of the system due to facing the fault, to prevent permanent(More)
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