Active filters provide significant harmonic and reactive power compensation and are thereby widely accepted as devices for power quality enhancement.. Many research works have been done to improve the dynamic performance of active filters. Current research work focuses on implementing a Minimally Switched Shunt Active Power filter for power quality enhancement. Minimally switched grid interacti...

This paper proposes a new control method of three phase active power filterfor reducing the source current harmonics for nonlinear loads. The control strategy includes the dq transformations and hysteresis technique for current injection. Renewable energy source (solar energy) is used as a backup device for converter. Dc voltage deviations due to harmonic injections are tracked by using proport...

This paper presents application of fuzzy logic controller for shunt active power filter to improve power quality in the distribution systems. The main feature of fuzzy logic controller does not require any complex mathematical model of the systems to regulate dc bus capacitor voltage. The reference compensating current has been estimated by unit vector template generation technique. The actual ...

This paper presents a new control strategy for a three phase shunt active power filter, which consists of applying an adaptive nonlinear control. This technique consists of applying an adaptive nonlinear control to the uncertain nonlinear model of shunt active power filter obtained in (dq) frame by using the power balance between the input and output sides. The designed Adaptive nonlinear contr...

ABSTRACT In this paper, we apply the PQ theory with shunt active power filter in an unbalanced and distorted power system voltage to compensate the perturbations generated by non linear load. The power factor is also improved in the current source. The PLL system is used to extract the fundamental component of the even sequence under conditions mentioned of the power system voltage.

-This paper Discuss about the problem occurring in the medium voltage distribution network such problems reactive power, harmonics and unbalanced load current compensation of Medium voltage Distribution systems. It proposes a simple and inexpensive solution to enhance power quality when a particular connection to the high voltage transmission network. It presents the design of a active power fi...

Abstract: Along with the increasing demand on improving power quality i.e generally defined as any change in power (voltage, current, or frequency) that interferes with the normal operation of electrical equipment, the most popular technique that has been used is Active Power Filter (APF); This is because Passive filters performance is limited to a few harmonics and they can introduce resonance...

This paper deals with the use of shunt active filter to compensate current perturbations produced by non linear loads. To perform the identification of disturbing currents, the so called Instantaneous Active and Reactive Power Method (pq) is used. A Phase Locked Loop (PLL) circuit, locked to the fundamental frequency of the system voltage, is also introduced for eventual mains voltages perturba...

This paper first presents a simple control technique for active filters to compensate current harmonics and reactive power of nonlinear loads. This method is usable for both single –phase and three –phase systems. Then a new method for load balancing and reactive power compensation for unbalanced sinusoidal load currents is presented. Finally by combination of two methods an active filter contr...

The photovoltaic (PV) system exhibits a nonlinear current-voltage (I-V) characteristic that its maximum power point (MPP) varies with solar insolation and temperature. In this paper, a maximum power point tracking (MPPT) method using fuzzy logic control (FLC) is presented. This method is based on the concept of perturbation and observation (P & O) algorithm to track the MPP. The two stage grid ...