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Solar matching systems, which are specialized systems for use in sunlight-type plant factories, have recently been attracting significant attention. In such systems, filtered blue and red light, which are necessary for photosynthesis, are applied to plant growth, while the unneeded green light is used for electric power generation. Since accurate estimates of photovoltaic (PV) power generation amounts...
This paper proposes to use a combinatorial optimization technique, the branch and cut algorithm, to design an hybrid isolated microgrid in the Colombian community of Unguia. In addition, this paper presents a comparison between the designs obtained with the branch and cut algorithm, the software HOMER and a genetic algorithm for the Unguia community. The proposed microgrid includes two diesel generators...
The increasing penetration of renewable energy sources in power systems has increased the amount of generating units employing power electronics as their grid interface, instead of synchronous generators. Their different dynamics have brought new challenges for power system operators; in particular, the reduction of the total inertia of power systems, which leads to larger frequency disturbances....
Intensive research is being directed to renewable energy due to their significant features. The converter is the core of the renewable energy system. Recently, a converter topology called Modular Multilevel Converter (MMC) has been introduced whose main challenge is the balance of its Submodules (SMs) capacitors voltages. Hence, a voltage sensor is required for each SM to measure its capacitor voltage;...
This paper presents a feasibility study on the prototyping of a hybrid EPAC (Electric Pedal Assisted Cycle) through an FC-B-UC (Fuel Cell — Battery — Ultra-Capacitors) power system. Aim of this work is the characterization of a PEMFC (Proton Exchange Membrane Fuel Cell) in order to confirm its theoretical performances and to verify the possibility of its installation on an e-bike.
This paper presents a real-time, low-cost, wireless, AC and DC monitoring system based on an ATmega328P-PU microcontroller. The proposed system is composed by different client nodes, which have the task to measure the main electrical quantities involved in the system, and a server node that collects the data and send them to a display device. The system is well suited for a good accuracy monitoring...
This paper presents a novel study of the performances of a five-level three-phase Cascaded H-Bridge Multilevel Inverter with Phase Shifted B-Spline based modulation techniques. The study has been focused on the use of B-Spline functions as carrier signals in order to evaluate the performances of the converter in terms of harmonic content on the output voltage. In the first step of this analysis the...
This paper aims to present an integrated platform to explore the role of society, culture, and behavior in energy efficiency uptake, and identify specific marketing techniques that may result in user behavior modification. We developed a consumer behavior modification framework which monitors consumer energy usage through the SDG&E Green Button API and make recommendations to the consumer. Behavior...
In this paper a detailed description of the design and simulation of a DC ultra-fast recharging station for Electric Vehicles is carried out. The system consist of a single AC/DC grid connected inverter, a DC-Bus and two DC/DC converter to recharge the batteries of the EVs. The system also has the vehicle-to-grid (V2G) capability. The design of the components of the system and the control schemes...
A strategy of control based on a model reference adaptive control (MRAC) is proposed for a wind Turbine. The electrical machine used is a doubly fed induction generator (DFIG). The proposed MRAC technique is designed, based on sliding mode and fuzzy logic methodologies. The goal is to control the generation of the power in the wind turbine. The simulation results obtained are satisfying and with high...
The world has grown quickly and almost all the transportation equipment work with fossil fuels. Since electrical energy can be generated from clean and efficient sources, the world energy consumption should change to electric type. Charge stations should be bidirectional so that power could be transferred from grid to vehicle and vice versa. In this condition, the grid is prone to new kind of challenges...
Integrate Solar PV in scalable on to the grid connected and standalone power generation system has increased attention in these days due to its sustainability and more greener generation. This has become a good option to reduce the telecom Radio Base Stations utility power consumption. The techno economic feasibility of Solar PV integration methodologies in to On-Grid telecom based stations, basically...
Control of renewables by Synchronous Power Controller (SPC) technology provides virtual damping and inertia which results to support phase stability on the grid and keep synchronism of interconnected areas tighter. Serving these benefits needs to have proper dynamic interaction between renewables and grid. In this paper, according to the dynamic modeling of Renewable Static Synchronous Generation...
In this paper, a variable dc bus control strategy is evaluated for a bidirectional grid connected electric vehicle (EV) charger topology. The EV charger under consideration comprises of an ac-dc 3-φ active rectifier stage followed by a dc-dc dual active bridge (DAB) converter. The voltage of the common dc-link between the ac-dc stage and the dc-dc stage is regulated such that it follows the voltage...
This paper addresses the stability challenges that exist in a bidirectional grid connected electric vehicle (EV) charger. The EV charger under consideration comprises of an ac-dc single phase active rectifier stage followed by a dc-dc dual active bridge (DAB) stage. small-signal models suited for stability analysis of this charger are derived. Controller design considerations are discussed in order...
A new compact and easy-to-achieve edge termination featuring the n-p double rings and all-cover field plates is presented for silicon high-voltage devices. This structure can divide and share much more voltage at each n-p double ring than its conventional counterpart does and thus largely shrink the lateral spreading of the depletion region. At a given blocking voltage, it helps save the chip area,...
The ease of expansion of power system and lowered cost made the use of modular converters in Renewable Energy System more common. Different configurations are implemented depending on the applications. Control strategies like fuzzy logic, droop method and charge control scheme are developed for achieving sharing of current and voltages among the converters. In this paper new modularization architecture...
This paper presents a novel zero-voltage-switching approach for predictive boundary conduction mode PFC converter for LED lighting. In the proposed method, instead of being detected by a sensing circuit, the switching off-time for achieving zero-voltage-switching is determined by analytical equations of PFC converter. Therefore, the efficiency reduction caused by sensing circuit can be eliminated...
DC community and residential microgrids are recognized as effective means for electrification of remote areas as a result of monumental efforts in many parts of the world — most significantly in India — but also through similar efforts in Nepal, Cameroon, New Guinea and Nigeria. So far modular approaches have been developed that enable construction of scalable microgrids based on PV and battery storage...
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