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This paper is concerned with modification of the One Cycle Controller for DCM Boost high quality rectifier. With the proposed control circuit the boost converter can attain a near unity power factor and near zero total harmonic distortion. This paper presents the theoretical analysis, simulation and experimental results.
An AC microgrid connected to a solar energy conversion system (SECS) and a battery energy storage system (BESS) with a novel energy management and control strategy is being presented in this paper. This configuration aims at feeding fixed power to the grid, thus reducing the extra burden on the grid created by local loads. The first stage boosts the PV voltage and harvests maximum power (Pmax) from...
The focal point of this paper is to design and implement a Dc-Dc boost converter based on fixed frequency sliding mode control in continuous conduction mode for hybrid vehicles. The equivalent control based sliding mode controller operated at fixed frequency is designed by keeping in view the stability of the sliding surface. Matlab / Simulink is used to model and evaluate the design of the equivalent...
A maximum power point tracking (MPPT) scheme based on a power factor correction (PFC) strategy that uses a multiplier approach is presented. The purpose is that the switching converter behaves as a resistor seen by the photovoltaic module, and thus regulate the input voltage to a desired value. Moreover the multiplier approach considers an inner current loop and an outer voltage loop. In order to...
This paper presents a voltage control strategy based on the optimal duty cycle for a renewable energy system comprised of a Thermoelectric Generator (TEG) in cascade with the KY-Converter, a voltage-boosting topology, and coupled to a resistive load. The mathematical model that describes the TEG is presented as well as a derivation for optimal values (i.e. current and voltage) that provide maximum...
This paper presents a model of hybrid energy system (HES) consisting of wind energy system (WES) and solar photovoltaic (PV) solar system connected with the grid and its performance is examined under load variation and systems input parameters. A centralized DC bus Architecture power generation is used for the proposed HES that includes a Shockley diode equation PV array and wind turbine driven by...
This paper presents a conventional DC-DC boost converter for low and wide voltage supply range, suitable for energy harvesting purpose. The output voltage can be increased by controlling the transistor switching frequency, duty cycle, inductance, load capacitor, rise, and fall time. Both computer simulation and experiment results are performed in details. Experiment results have shown an error less...
This paper describes a method to control a boost converter with LC input filter working under continuous conduction mode. The idea of this method relies on Lyapunov stability criterion. All state variables are controlled in the same times. Therefore, the responses of this controlled system are fast. However, since the output command signal is generated directly from the controller, the switching frequency...
The PEM Fuel cell are deliberated as one of the almost favourable devices for isolated/grid connected distributed generations (DGs) due to its cleanliness, modularity and higher potential capability. This paper presents the modeling and simulation for 1.2 kW PEM Fuel Cell Power Generation of Isolated Load conditions. The proposed scheme consists of a Fuel rate selector, Fuel rate regulator, Fuel cell...
Boost converters have nonlinear characteristics by semiconductor switching elements in a circuit. Generally, controllers are designed by a linearized model of the boost converter based on state space averaging method. This study proposes design scheme considering discontinuous conduction mode without linearization. In detail, firstly, modeling of boost converter in discontinuous conduction mode is...
A high gain boost converter is proposed in this paper. This converter belongs to two switch topology and is capable of giving a higher voltage gain at moderate duty ratios. Although it is two switch topology, but they are controlled synchronously and hence single pulse width modulated signal is sufficient enough to control the power processing. Through steady-state analysis various parameter design...
Photovoltaic (PV) systems are solar energy supply systems, which either supply power directly to an electrical equipment or feed energy into the public electricity grid. In the photovoltaic system, power electronic conversion is necessary to improve the efficiency of PV panels and system stability. In these systems, the backstage power circuit consists of a high step-up DC to DC converter and a full-bridge...
This paper presents analysis and design of low source current ripple high-gain boost converter. The proposed converter exhibits higher voltage gain, almost double, in comparison to the well-established conventional boost converter. A steady-state analysis is made, and then converter elements design expressions are established. These design expressions are then used to design a 24 to 100 V, 50 W prototype...
Maximum Power Point Tracking algorithms (MPPT) are used to track maximum power, a DC-DC Boost converter is used to obtain the impedance matching between the PV array and the load. Although a huge number of approaches have been proposed in literature, the methods based on the perturb and observe (P&O) technique are the most widely employed in commercial products. The reason lies in the fact that...
A fuzzy logic controller for DC-DC Buck and Boost converters is designed and presented in this paper. The mathematical model of buck and boost converter and fuzzy logic controller are first derived then converted to a hardware model using VHSIC Hardware Description Language. The hardware model was subsequently synthesized and implemented in a Field programmable Gate Array (FPGA) chip. In order to...
In this article, sliding mode controller is used to improve power factor in AC-DC boost converters. A comparison between integral sliding mode controller (ISMC) and double integral sliding mode controller (DISMC) for the current loop of the boost PFC converter is proposed in this paper. In sliding mode control method, circuit complexity is less. Also good stability and fast response versus to the...
In this paper a digital PID controller is designed for an H-bridge soft-switching boost converter. The digital PID controller is designed analytically using the discrete-time transfer function of the converter. Using this method, the PID controller gain range is obtained as a set of inequalities in two variables for a fixed third variable. By plotting the region enclosed by the inequalities the controller...
This paper proposes a hybrid AC/DC micro-grid which consists of an AC grid and a DC grid and operates in both grid-tied and autonomous mode. Wind turbine generators (WTGs), diesel generators (DGs) and conventional AC loads are connected to the AC grid whereas photovoltaic arrays with boost converter (PVBC), fuel cell generators and DC loads are tied to the DC grid. AC bus and DC bus are coupled through...
This paper presents the modelling and simulation of proton exchange membrane (PEM) fuel cell (FC) together with a dc-dc converter and dc-ac inverter. The need for the dc-dc converter arises as a result of the output voltage generated from the FC which fluctuates with variation in load. The FC voltage is therefore, controlled using dc-dc converter to provide a regulated dc voltage output at 220 V for...
This paper presents a DSP based direct digital control (DDC) design and implementation for a high power boost converter. A dual loop voltage control is digitally implemented using DSP. The real time workshop (RTW) is used for automatic real-time code generation. A laboratory prototype of a 20 kW boost converter based on TMS320F2808 DSP is presented. The proposed controller performance is investigated...
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