Design Of Shunt Active Power Filter Research Articles

SAPF Parameter Optimization with the Application of Taguchi SNR Method

Non-linear devices draw non-sinusoidal currents from the source; hence, they cause harmonic distortions in power systems. The shunt active power filter (SAPF) is a well-known method for alleviating current harmonics, compensating the reactive power and improving the power factor; however, the effective design of an SAPF is quite challenging and a thrust area of research. The current controlling technique, switching pulse generation technique and parameter selection are cumbersome tasks in SAPF design. SAPF performance depends on the proper selection of many parameters, such as filter interfacing impedance, DC-link capacitor and PI-controller gains. The effect of these parameters on the performance of SAPF has been studied and optimum values have been obtained by using the Taguchi method. This paper also indicates the benefits of using the Taguchi method compared with existing genetic algorithm (GA) for optimizing the parameters of the SAPF. An instantaneous reactive power theory (IRPT)-based SAPF has been modeled and simulated in MATLAB/Simulink. The SAPF’s parameters have been optimized by using the both proposed Taguchi SNR and the existing GA method. With optimized values of parameters results have been obtained, analyzed and the superiority of the proposed Taguchi method over the existing GA method is discussed. The simulation results were also validated with experimental results.

Performance analysis of shunt active filter for harmonic compensation under various non-linear loads

Abstract This paper shows the motivation towards the development of a dq-Proportional Resonant (PR) control strategy in shunt active power filter design for eliminations of distortions in source currents for different loading conditions. The switching signals for the inverter of shunt active power filter (APF) have been generated by the hysteresis current control scheme. The controller performance has been verified by using different types of loads such as non-linear balanced, unbalanced and variable etc., with the system in MATLAB/Simulink environment. An experimental prototype has also been developed in the laboratory and results are analyzed to validate the efficacy of the proposed controller.

Performance of PV integrated multilevel inverter for PQ enhancement

ABSTRACT Three phase shunt active power filter (SAPF) using multilevel inverter (MLI) is implemented in this paper for a grid integrated solar photovoltaic (PV) system for eliminating the harmonics. The objective in this work is to develop and regulate the grid integrated PV system for mitigation of harmonics with incorporation of SAPF. The PV integrated SAPF delivers the active/reactive power to the grid to reduce the harmonic contents. Harmonic compensation ability of SAPF is mainly achieved by employing suitable control technique to estimate the reference current signal. Here, adaptive artificial neural networks (AANNs) like adaptive neuro-fuzzy interference system (ANFIS), Widrow–Hoff adaptive linear neuron (WH ADALINE) and Modified Widrow–Hoff adaptive linear neuron (MWH ADALINE) are employed for generating the reference current of VSI in the MLI. The control techniques are tested in MATLAB/SIMULINK as well as real-time OPAL-RT environments. It is noticed that proposed MWH ADALINE-based SAPF design shows enhanced performance to maintain the power quality (PQ) by restricting the distortion level below 5% as per the IEEE/IEC standard.

High Power Density Three-Phase Shunt Active Power Filter Design Based on Multiple Magnetic Integrations of LCL Filter

The LCL filter has been widely used in inverter design due to its excellent attenuation capability for the switching harmonics. Nevertheless, the large cost associated with the conventional three-phase LCL filter has limited its usage. This paper proposes a multiple magnetic integration strategy of the LCL filter to reduce the cost while increasing power density. In the new design, an EIE-type magnetic core is put forward for the single-phase LCL filter, where the magnetic fluxes generated by the two discrete inductors cancel out mostly and the residual flux is mainly related to the small capacitor branch current. The magnetic integration is then extended to three-phase by adopting the three-phase three-limb core. Due to the coupling among phases, the equivalent inductance is much larger than the self-inductance such that the self-inductance can be reduced dramatically. An experimental prototype is developed which demonstrates the validity of the proposed method.