Experimental Validation of a Shunt Active Power Filtering System for Improvement the Energy Quality employing the Direct Power Control

Abstract

This paper proposes a study, simulation for MATLAB/Simulink and realization of a shunt active power filtering system to improve the energy quality of the system. Let’s start with the problematic imposed on the low-voltage power system where we see the harmonics in the power grid imposed by the non-linear load voltage rectifier, electric motor, transformer, etc These harmonics pollute the supply network on the one hand and deteriorate the electrical devices on the other hand. To solve this problem, we have mounted a voltage inverter in parallel in the network between the power source and the load (our case a rectifier). This produces currents by offsetting all harmonics by applying direct power control (DPC). The results obtained in the laboratory by a test bench clearly show us that the graphs are similar with those obtained by the simulation. Then, the choice of the parameters of the system gave us a good quality of electrical energy. Thus, they meet the necessary conditions (THDis) less than 5% and ($(\cos \varphi )$ is close to unity) according to the recommendation IEEE519.