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This paper focuses on the problem of controlling a single-phase grid connected to the photovoltaic system with L filter. In this system the DC/AC converter is constituted by two stages: a boost power converter and a single phase inverter. The main control objective is threefold: (i) extracting maximum possible power from photovoltaic module MPPT (ii) tight regulation of the DC link voltage (iii) the...
In this paper, the control problem of three-phase grid connected to the PV system through a LCL filter is presented. In this work, we seek the achievement of three control objectives: (i) the voltage provided by PV panel must be controlled to achieve the optimum power by means of controlling the input voltage of DC/DC converter; (ii) regulating the DC link voltage to a constant reference value; (iii)...
This paper presents a single phase full bridge bidirectional boost rectifier with power factor correction. A novel control based on Singular Perturbation is used in this circuit to assert that inductor currents are fast states and capacitor voltages are slow states. The goals of this paper are the analysis and the design methodology of cascaded proportional-integral controller in feedback loop by...
The systematic approach of designing a robust digital controller to solve output regulation problem for a full bridge boost rectifier with unknown external disturbances and varying parameters is discussed. The design of digital controller based on the so-called pseudo-continuous approach by using Singular Perturbation is presented, where this controller is the result of continuous-time controller...
The problem of controlling half bridge single phase unity power factor rectifier circuit is considered. The control objectives are to achieve i) output regulation and ii) near unity power factor in the presence of an uncertain load. The considered problem is dealt with using a double-loop controller developed on the basis of the system nonlinear model. The inner-loop is designed using Lyapunov technique...
We are considering the problem of controlling filtered AC/DC switched power converters of the boost type. The control objectives are twofold: 1) guaranteeing a regulated voltage for the supplied load and 2) enforcing power factor correction (PFC) with respect to the main supply network. The considered problem is dealt with using a double-loop controller developed on the basis of the system nonlinear...
We are considering the problem of controlling synchronous motors driven through AC/DC rectifiers and DC/AC inverters. The control objectives are threefold: (i) forcing the motor speed to track a reference signal, (ii) regulating the DC link voltage, (iii) enforcing power factor correction (PFC) with respect to the power supply net. First, a nonlinear model of the whole controlled system is developed...
We are considering the problem of controlling AC/DC full bridge converters. The control objectives are twofold: (i) guaranteeing a regulated voltage for the supplied load, (ii) enforcing power factor correction (PFC) with respect to the main supply network. The considered problem is dealt with using a nonlinear controller that involves two loops in cascade. The inner-loop is designed, using sliding...
The problem of controlling PWM AC/DC power converters is considered. The focus is made on a class of full- bridge boost rectifiers commonly referred to power factor correctors. We seek both output voltage regulation and power factor correction. These are achieved thanks to a cascade control structure involving two loops. The inner loop acts on the switching device so that the input current tracks...
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