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...
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ISBN:
(纸本)9781538668672;9781538668665
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 ( cosφ) is close to unity) according to the recommendation IEEE519.
This article presents two methods for the compensation of harmonics generated by a nonlinear load. The first is the classical PI controller. The second is the modern controller by Fuzzy ogic Tyie-1. Both methods are a...
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Photovoltaic power is widely used to supply isolated or unpopulated areas (lighting, pumping, etc.). Great advantage is that this source is inexhaustible, it offers great safety in use and it is clean. But the dynamic...
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Photovoltaic power is widely used to supply isolated or unpopulated areas (lighting, pumping, etc.). Great advantage is that this source is inexhaustible, it offers great safety in use and it is clean. But the dynamic models used to describe a photovoltaic system are complicated and nonlinear and due to nonlinear I-V and P-V characteristics of photovoltaic generators, a maximum power point tracking technique (MPPT) is required to maximize the output power. In this paper, two online techniques of maximum power point tracking using robust controller for photovoltaic systems are proposed, the first technique use fuzzy logic controller (FLC) and the second use sliding mode controller (SMC) for photovoltaic systems. The two maximum power point tracking controllers receive the partial derivative of power as inputs, and the output is the duty cycle corresponding to maximum power. A Photovoltaic generator with Boost converter is developed using MATLAB / Simulink to verify the preferences of the proposed techniques. SMC technique provides a good tracking speed in fast changing irradiation and when the irradiation changes slowly or is constant the panel power of FLC technique presents a much smoother signal with less fluctuations.
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