A differential unipolar trailing edge modulated boost inverter for solar applications
20 Apr 2016-pp 468-471
TL;DR: In this article, the authors used solar energy as power source and processed the solar power by a novel power conversion system and given to the AC load, which included a stand-alone photovoltaic system, battery, Sinusoidal inverter, unipolar trailing edged PWM controller and AC load.
Abstract: The demand for clean energy is increasing daily due to the depletion of fossil fuels. Solar energy is considered as one of the promising green energy source for the future generation. This paper uses solar energy as power source. The solar power is processed by a novel power conversion system and given to the AC load. The suggested system includes a stand-alone photovoltaic system, Battery, Sinusoidal inverter, unipolar trailing edged PWM controller and AC load. This system serves pure sinusoidal output for the AC load thus extending lifetime of the load equipment. For blending an inverter into a system, one has to follow a very vital guideline of limiting THD lesser than 5%. THD represents the amount of total harmonic content present in output current. This paper focuses on minimizing THD by providing an inverter with minimized output current THD. The advised inverter overcomes many demerits exhibited by traditional and existing inverters. The designed system will provide 48Vmax AC voltage with highly diminished harmonic content for an input of 48V DC. The complete system was simulated in MATLAB SIMULINK and hard ware experimentation has been conducted with dSPACE-1104 real time interfacing kit. The hardware and simulation results have been presented for further analysis.
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References
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TL;DR: In this article, the authors focus on inverter technologies for connecting photovoltaic (PV) modules to a single-phase grid and categorize the inverters into four classifications: 1) the number of power processing stages in cascade; 2) the type of power decoupling between the PV module(s) and the single phase grid; 3) whether they utilizes a transformer (either line or high frequency) or not; and 4) the kind of grid-connected power stage.
Abstract: This review focuses on inverter technologies for connecting photovoltaic (PV) modules to a single-phase grid. The inverters are categorized into four classifications: 1) the number of power processing stages in cascade; 2) the type of power decoupling between the PV module(s) and the single-phase grid; 3) whether they utilizes a transformer (either line or high frequency) or not; and 4) the type of grid-connected power stage. Various inverter topologies are presented, compared, and evaluated against demands, lifetime, component ratings, and cost. Finally, some of the topologies are pointed out as the best candidates for either single PV module or multiple PV module applications.
3,530 citations
"A differential unipolar trailing ed..." refers background in this paper
...Especially in the field of solar, there is more pronounced research due to the widespread presence of solar energy [1] [4]....
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Book•
03 Oct 2003
TL;DR: In this paper, an integrated and comprehensive theory of PWM is presented and the selection of the best algorithm for optimum pulse width modulation is an important process that can result in improved converter efficiency, better load (motor) efficiency, and reduced electromagnetic interference.
Abstract: An integrated and comprehensive theory of PWM. The selection of the best algorithm for optimum pulse width modulation is an important process that can result in improved converter efficiency, better load (motor) efficiency, and reduced electromagnetic interference. However, the identification of the best approach is a complex process requiring extensive mathematical manipulation.
2,450 citations
"A differential unipolar trailing ed..." refers methods in this paper
...Now to obtain unipolar trailing edge PWM [9] [11], the duty cycles of each converter i.e. Dl and D2 is compared with trailing edge carrier wave as shown in Fig....
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...Along with these things a unipolar trailing edge PWM controller is used for DUTEMBI....
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TL;DR: It is shown that versatile stand-alone photovoltaic (PV) systems still demand on at least one battery inverter with improved characteristics of robustness and efficiency, which can be achieved using multilevel topologies.
Abstract: This paper shows that versatile stand-alone photovoltaic (PV) systems still demand on at least one battery inverter with improved characteristics of robustness and efficiency, which can be achieved using multilevel topologies. A compilation of the most common topologies of multilevel converters is presented, and it shows which ones are best suitable to implement inverters for stand-alone applications in the range of a few kilowatts. As an example, a prototype of 3 kVA was implemented, and peak efficiency of 96.0% was achieved.
593 citations
"A differential unipolar trailing ed..." refers background in this paper
...In order to convert it to AC, we need an inverter [3] [4]....
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TL;DR: In this paper, the state-of-the-art in research works on non-isolated DC-DC buck, boost, buck-boost, Cuk and SEPIC converters and their characteristics, to find a solution best suiting an application with maximum power point tracking.
Abstract: Photovoltaic (PV) is a fast growing segment among renewable energy (RE) systems, whose development is owed to depleting fossil fuel and climate-changing environmental pollution. PV power output capacity, however, is still low and the associated costs still high, so efforts continue to develop PV converter and its controller, aiming for higher power-extracting efficiency and cost effectiveness. Different algorithms have been proposed for Maximum Power Point Tracking (MPPT). Since the choice of right converter for different application has an important influence in the optimum performance of the photovoltaic system, this paper reviews the state-of-the-art in research works on non-isolated DC–DC buck, boost, buck–boost, Cuk and SEPIC converters and their characteristics, to find a solution best suiting an application with Maximum Power Point Tracking. Review shows that there is a limitation in the system's performance according to the type of converter used. In can be concluded that the best selection of DC–DC converter which is really suitable and applicable in the PV system is the buck–boost DC–DC converter since it is capable of achieving optimal operation regardless of the load value with negotiable performance efficiency and price issue.
257 citations
TL;DR: Analytical techniques for the determination of the expressions for the modulation signals used in the carrier-based sinusoidal and generalized discontinuous pulse-width modulation schemes for two-level, three-phase voltage source inverters are presented.
Abstract: This paper presents analytical techniques for the determination of the expressions for the modulation signals used in the carrier-based sinusoidal and generalized discontinuous pulse-width modulation schemes for two-level, three-phase voltage source inverters. The proposed modulation schemes are applicable to inverters generating balanced or unbalanced phase voltages. Some results presented in this paper analytically generalize the several expressions for the modulation signals already reported in the literature and new ones are set forth for generating unbalanced three-phase voltages. Confirmatory experimental and simulation results are provided to illustrate the analyses.
205 citations