Fuzzy logic controller for three‐level shunt active filter compensating harmonics and reactive power

Abstract

In this paper, the use of a three-level inverter as a shunt active power filter is carried out, taking advantage of the benefits of multi-level inverter, namely, the reduction both in the overall switching losses and in total harmonic distortion. The main focus of this article is to investigate the potentialities of the inverter employed as shunt active power filter on the compensation of the reactive power and the mitigation of harmonics drawn from a nonlinear load and unbalanced sources. The most previously reported three-level inverter-based shunt active power filters have been controlled and monitored through conventional controllers, which require a complicated mathematical model. In order to overcome this problem, an extended intelligent controller is proposed for a three-level shunt active power filter.The aim of the proposed fuzzy logic control algorithm is to improve the behavior of voltage across the floating capacitors in steady/dynamic states and to minimize the switches commutations by taking into account the references of the harmonic currents injected in the network. The proposed control strategy has been simulated, and the obtained results prove that it is very successful.

Passivity-Based Direct power control of Shunt Active Filter under Distorted Grid Voltage Conditions

“…In case where non linear loads are available among consumers, the harmonic currents are generated in the network. In these situations, the shunt active power filter (SAPF) is considered as the best solution for the mitigation of harmonics upstream of the polluter system and the compen- sation of the reactive energy in applications of low and medium power so as to improve the effectiveness of the energy efficiency and power quality [12][13][14]. This type of filter allows to compensate for the disruptions even when the characteristics of the load change over time.…”

Design Single Fuzzy Adaptive Controller for 4 DOF Medical Robots

“…As mentioned that fuzzy logic application is not only limited to the modelling of nonlinear systems but also this method can help engineers to design a model-free controller. In this research, single adaptive PID like fuzzy controller is design, estimate, improve the response of PD computed torque controller, and applied to 4-DOF surgical robot to improve the sensitivity [7][8].…”

Adaptive-fuzzy hysteresis controlled three phase shunt active filter for constant switching frequency

“…Currently, the current control by hysteresis is the most appropriate technique for the control current in SAPF. This technique has excellent qualities as its simplicity, ease of implementation (it does not require an extensive knowledge of the system to be controlled), good stability, satisfactory accuracy, very good quick response in dynamic mode, accuracy in reference current pursuit and extremely good dynamic [4], [5]. It has a good stability, a satisfactory precision and a fast response time in dynamic mode.…”