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A fuzzy logic approach to shunt active power filter and hybrid active power filter

Sahoo Nirjharini, Panda Gayadhar, Subudhi B. D.

Journal of Power Technologies

2023

Vol. 103, nr 4

209--217

This paper describes a Fuzzy Logic approach to Shunt Active power filter (SAPF) versus Hybrid Active Power Filter (HAPF) using Simulink. Here hysteresis controlled PWM method is applied to the SAPF and HAPF as a current controller and Fuzzy logic controller as a inverter dc voltage controller. To reduce harmonics, Shunt Active Power Filters (SAPFs) are used with various control schemes, but Hybrid Active power filter is a power electronic device which has both the characteristics of passive power filters and active power filters, which helps in cancelation of the harmonics by producing compensating signal. The fuzzy-hysteresis controller is designed and its simulation results are presented for both the filter types, showing acceptable THD results for the word length used in the fixed-point computations involved in the switching sequence generation. The results of the above controller are compared with the Indirect current controller.

Spider monkey optimization (SMO) - lattice Levenberg-Marquardt recursive least squares based grid synchronization control scheme for a three-phase PV system

Dash Dipak Kumar, Sadhu Pradip Kumar, Subudhi Bidyadhar

Archives of Control Sciences

2021

Vol. 31, No. 3

707--730

This paper presents a new grid integration control scheme that employs spider monkey optimization technique for maximum power point tracking and Lattice Levenberg Marquardt Recursive estimation with a hysteresis current controller for controlling voltage source inverter. This control scheme is applied to a PV system integrated to a three phase grid to achieve effective grid synchronization. To verify the efficacy of the proposed control scheme, simulations were performed. From the simulation results it is observed that the proposed controller provides excellent control performance such as reducing THD of the grid current to 1.75%.