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This paper presents a stand-alone hybrid PV/fuel cell system using single-inductor dual-input single-output (SI-DISO) boost converter. Compared to conventional hybrid power system, the proposed system significantly reduce the number of components, the system size and the corresponding cost. A model predictive control (MPC) method has been developed to control the SI-DISO boost converter to achieve...
In this paper, a novel Dynamic State Estimation–current feedback with STATCOM control scheme is proposed for the mitigation of voltage fluctuation of Solid Oxide Fuel Cell (SOFC) power station connected to the complex power grids during electrical faults. The proposed control scheme is compared to two existing control strategies and shows its superiority in alleviating voltage flickers and deviations...
Nowadays, the diffusion of renewable energy sources and electric vehicles are turning the traditional passive distribution networks into active grids, requiring Distribution Management System (DMS) to exploit Information and Communication Technology (ICT) improvements to get a smarter control through wider communication and local monitoring. In this paper, a Mixed-Integer Linear Programming (MILP)...
In today's era of renewable energy, hydrogen fueled proton exchange membrane (PEM) fuel cells are considered as an important source of clean energy. As the technology is emerging fast, many universities and colleges have adopted fuel cells in their educational program. In this paper, we will present the modeling and control of the fuel cell pilot plant present in Clean Energy Trainer, which is used...
This paper treats a control strategy for obtaining an energy management system for average power electrical vehicles. A very important system from an electrical vehicle is represented by the power supply system which can be composed of at least two are more sources like fuel cell, battery and ultra-capacitor as example and an energy management system is needed in order to satisfy power demand of the...
There are some limitations during the interconnection of fuel cells (FCs) to the utility grid. The output voltage of fuel cell is low and unregulated DC. It should be boosted and inverted before connecting to the grid. Because of the slow response time of chemical processes in FCs, a suitable power conversion unit is needed which improves the dynamic response of the system during interconnection with...
Alternative energy systems (AES) are becoming popular for small scale power generation. Designing the converters which transform the DC power into AC is the main development area of AES. Conventional single-phase voltage source inverter (VSI) uses buck topology which gives lower average output voltage than the input DC voltage. However, where the output voltage requirement is larger than the input...
This paper presents a novel strategy for a hybrid energy management system consisting of a photovoltaic (PV) array, a polymer electrolyte membrane fuel cell (PEM-FC) as energy sources and Lithium ion (Li-ion) battery as an auxiliary energy storage. Such hybrid combination brings the reliability, redundancy and an overall energy efficiency in the system. DC-DC converters are used to interface PV-FC-battery...
In this paper, an adaptive network based fuzzy inference system (ANFIS) terminal sliding (TS) mode) controller is suggested for improving the reactive power and overall stability. This ANFIS control system consists of an ANFIS controller and a TS controller which is designed to do as a main controller and the TS controller is designed to cope with disturbances and uncertainties. Small signal model...
Fuel cell (FC) is one of the most suitable candidates for distributed generation system either in standalone or grid connected mode. Due to the cleanness, modularity and higher potentiality, FC systems can be used in both single and hybrid systems for power generation. In this study a 26 kW standalone proton exchange membrane fuel cell (PEMFC) based energy system is developed using MATLAB/Simulink®...
The actual trend in automotive is to reduce as much as possible pollution caused by motor vehicle emissions. This could be achieved by using electrical propulsion systems which usually contains: electrical machine, three phase voltage source inverter (VSI), voltage supply system. The main problem of the full electric vehicles represents the autonomy due to low energy capacity of batteries. This issue...
In this paper, two control algorithms for maintaining constant DC bus voltage under wide variations in generation and loading conditions in a DC micro-grid are discussed. They are: the traditional voltage based control and a modified voltage plus SoC (state-of-charge)-based control. The DC micro-grid consists of a photovoltaic (PV) system, a wind energy system based on permanent magnet synchronous...
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...
DC/DC converters with hybrid proton exchange membrane (PEM) fuel cell and battery power sources are designed and implemented using sliding mode control (SMC). The converters are typically comprised by unidirectional boost converter and bidirectional converter which are used for regulating the bus voltage and managing power distribution. SMC is selected to control the converters since it can cope with...
The development of static power converters capable of transforming DC energy obtained from alternative sources into AC has become one of the main challenges in renewable energy systems. In this context, this paper presents a Stand-Alone Transformerless Hybrid Single-Stage Inverter that works with fully controlled waveforms of output voltage and input inductor currents. It also promotes high voltage...
In this paper, a nonlinear flatness and sliding mode controllers of a Fuel Cell and Supercapacitor (FC/SCs) DC-link voltage are proposed and validated by the simulation results. The nonlinear flatness strategy provides a simple way to achieve a linearizing feedback control law, which allows giving an exponential tracking of the desired energy references of FC and SCs. The ideas behind the proposed...
This paper presents advanced power management strategy for a stand-alone hybrid power system. The proposed system consists of a photovoltaic panel, Proton exchange membrane fuel cell and a battery-electrolyzer-super capacitor energy storage system. All the system components are connected to the same DC voltage bus through appropriate Dc-Dc power converters and supposed to be controlled by independent...
This paper proposes a sliding mode controller for air supply subsystem on a PEM Fuel Cell system in order to regulate and replenish the oxygen depleted from the Fuel Cell cathode during stack current demands. According to the stack current, a reference value of air flow was obtained with the steady-state analysis of oxygen excess ratio (OER). To ensure the system working in the reference value of...
A fuel cell is usually a low-voltage with hybrid voltage/current source characteristics. So that their output voltage must be increased to approximately a few hundred volts to be suitable for vehicles power trains or for any industrial application. Therefore a dc-dc power converter is required to set up the fuel cell voltage to high voltage DC bus. In this paper, analysis, implementation and control...
This paper presents a current controller and voltage balancing for a current-fed full-bridge converter, we have chosen this converter, which is an interleaved boost ‘like’ converter connected with a voltage doubler rectifier at load side via a high-frequency transformer. The advantages of this converter are: high voltage gain, low ripple input current and galvanic isolation. With the proposed controller,...
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