A single stage high gain buck-boost inverter with coupled inductor
12 Feb 2014-pp 1-5
TL;DR: In this article, a coupled inductor based high performance, high gain, single-stage inverter topology, which can be used for grid connected FC/PV applications or stand-alone applications is proposed.
Abstract: Output dc voltage from Fuel Cell (FC)/Photo Voltaics (PV) needs to be conditioned and converted into ac form before integrating to grid Normally, two stage converters are used for this purpose Two stage converters have several disadvantages like low efficiency, more number of components, big size, etc especially when they are operated at low input voltages In this paper, a coupled inductor based high performance, high gain, single-stage inverter topology, which can be used for grid connected FC/PV applications or stand-alone applications is proposed In the proposed topology, dc-dc power conversion and dc-ac power conversion can be done in a single stage The proposed topology has several features such as high gain, low cost and compact size This topology suits well for low power applications The principle of operation, steady state analysis of the proposed topology is presented in this paper The steady state analysis is verified by a simulation, simulation results of the proposed converter for an ac load is presented
Citations
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TL;DR: In this article, a grid-connected single-stage converter system for photovoltaic (PV) applications is presented, which transfers power from PV to grid while tracking maximum power point (MPP) continuously.
Abstract: Converter system that does both dc–dc conversion and dc–ac conversion in a single stage is called a single-stage converter system (SSCS). Compared to a two-stage converter, SSCS is more efficient and compact in size. In this paper, a grid-connected SSCS (GCSS) system for photovoltaic (PV) applications is presented. This GCSS transfers power from PV to grid while tracking maximum power point (MPP) continuously. The proposed system has several desirable features such as low switching loss, high gain, and compact size that makes this GCSS suitable for PV systems, where the PV system output voltage is low and varies with time. Design of the presented GCSS components with necessary equations and derivation of both current control loop and voltage control loop required for operation are given. Proposed GCSS is simulated using MATLAB/SIMULINK. Detailed simulation and experimental results are given to verify the efficacy of the proposed GCSS.
43 citations
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TL;DR: In this paper, a high gain coupled inductor-based single-phase SSCS is presented, which has many desirable features such as high gain, less switching losses, free from leakage inductance adverse effects and compact.
Abstract: Two stage conversion systems (TSCSs) normally use either boost converter or high gain dc-dc converter along with dc-ac inverter in order to transfer power from low input voltage dc source to high voltage ac load. When these TSCSs operate at extremely low input voltages, the boost converter has to operate at extremely high duty ratios. This in turn results in more losses and reverse recovery problems. Usage of high gain dc-dc converter results in more number of components, increase in control complexity and decrease in reliability. Single-stage conversion systems (SSCSs) are formed by merging both dc-dc and dc-ac conversion processes. These SSCSs have advantages like low loss, more compactness and less reverse recovery problems. In this study, a high gain coupled inductor-based single-phase SSCS is presented. This SSCS topology has many desirable features such as high gain, less switching losses, free from leakage inductance adverse effects and compact. Principle of operation, steady-state analysis and design of the proposed topology are described in detail. MATLAB simulation results of the proposed topology and experimental results using DSP28335-based experimental setup are presented to validate the proposed scheme.
16 citations
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TL;DR: A single stage converter system that does both dc-dc conversion and dc-ac conversion in one stage for photovoltaic applications and can deliver active power from PV to the grid while continuously tracking maximum power point (MPP).
Abstract: Single stage converter system (SSCS) does both dc-dc conversion and dc-ac conversion in one stage. In this paper, a SSCS for photovoltaic (PV) applications is presented. This system can deliver active power from PV to the grid while continuously tracking maximum power point (MPP). The proposed system is controlled such that it can deliver/receive reactive power from grid. The presented system has several advantages like high gain, low switching loss and compact in size. This system can be used effectively in PV systems, where output voltage of PV is very low. Control scheme of the system along with derivation of control loops is presented. The proposed topology is simulated using MATLAB/SIMULINK, simulation results are presented to validate the proposed idea.
6 citations
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TL;DR: A high gain dc-ac inverter topology is presented, which can produce an instantaneous output voltage higher or lower than the input dc voltage without any intermediate power conversion stage or transformers.
Abstract: Normally, a two stage power conversion system is used to convert a low dc voltage to high amplitude ac voltage. These two stage power conversion systems are very bulky, more complex in control and less efficient, etc when they are used, especially for low input dc voltages. In this paper a high gain dc-ac inverter topology is presented, which can produce an instantaneous output voltage higher or lower than the input dc voltage without any intermediate power conversion stage or transformers. Coupled inductor is used in this circuit in order to achieve high gain. The two stage power conversion will be done in a single stage by this converter. The proposed topology posses several desirable features like high gain, less loss and less size etc. The various modes of operation and steady state analysis of the proposed topology are presented. The proposed topology is simulated using MATLAB/SIMULINK, simulation results are presented to validate the proposed idea.
6 citations
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01 Oct 2018
TL;DR: This paper will review available transformer-less PV inverters topologies and those topologies will be classified on the basis of applicability for photovoltaic uses.
Abstract: In recent years, the interest in installing more photovoltaic systems to generate electricity power has rapidly increased. A number of reasons such as environmental concerns, electricity business restructuring, the fast developments of smallscale power generation technologies and micro-grid related systems can explain this trend. In order to improve the efficiency and reduce the cost of a photovoltaic system, many people are interested in PV inverter perfection, and this is due to the importance of this part in PV systems, it is the interface between produced and used electricity. In this paper we will focus on PV inverters, we will review available transformer-less PV inverters topologies and those topologies will be classified on the basis of applicability for photovoltaic uses.
2 citations
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References
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TL;DR: In this article, the authors proposed a new voltage source inverter (VSI) referred to as a boost inverter or boost DC-AC converter, which is intended to be used in uninterruptible power supply and AC driver systems design whenever an AC voltage larger than the DC link voltage is needed.
Abstract: This paper proposes a new voltage source inverter (VSI) referred to as a boost inverter or boost DC-AC converter. The main attribute of the new inverter topology is the fact that it generates an AC output voltage larger than the DC input one, depending on the instantaneous duty cycle. This property is not found in the classical VSI, which produces an AC output instantaneous voltage always lower than the DC input one. For the purpose of optimizing the boost inverter dynamics, while ensuring correct operation in any working condition, a sliding mode controller is proposed. The main advantage of the sliding mode control over the classical control schemes is its robustness for plant parameter variations, which leads to invariant dynamics and steady-state response in the ideal case. Operation, analysis, control strategy, and experimental results are included in this paper. The new inverter is intended to be used in uninterruptible power supply (UPS) and AC driver systems design whenever an AC voltage larger than the DC link voltage is needed, with no need of a second power conversion stage.
628 citations
"A single stage high gain buck-boost..." refers background in this paper
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TL;DR: In this article, the authors proposed a high performance single-stage inverter topology for grid connected PV systems, which can not only boost the usually low photovoltaic (PV) array voltage, but can also convert the solar dc power into high quality ac power for feeding into the grid, while tracking the maximum power from the PV array.
Abstract: This paper proposes a high performance, single-stage inverter topology for grid connected PV systems. The proposed configuration can not only boost the usually low photovoltaic (PV) array voltage, but can also convert the solar dc power into high quality ac power for feeding into the grid, while tracking the maximum power from the PV array. Total harmonic distortion of the current, fed into the grid, is restricted as per the IEEE-519 standard. The proposed topology has several desirable features such as better utilization of the PV array, higher efficiency, low cost and compact size. Further, due to the very nature of the proposed topology, the PV array appears as a floating source to the grid, thereby enhancing the overall safety of the system. A survey of the existing topologies, suitable for single-stage, grid connected PV applications, is carried out and a detailed comparison with the proposed topology is presented. A complete steady-state analysis, including the design procedure and expressions for peak device stresses, is included. Necessary condition on the modulation index "M" for sinusoidal pulsewidth modulated control of the proposed inverter topology has also been derived for discontinuous conduction mode operation. All the analytical, simulation and experimental results are presented.
585 citations
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TL;DR: In this article, a comprehensive review of step-up single-phase non-isolated inverters suitable for ac-module applications is presented, where the selected solutions are designed and simulated complying with the benchmark obtaining passive and semiconductor components ratings.
Abstract: This paper presents a comprehensive review of step-up single-phase non-isolated inverters suitable for ac-module applications. In order to compare the most feasible solutions of the reviewed topologies, a benchmark is set. This benchmark is based on a typical ac-module application considering the requirements for the solar panels and the grid. The selected solutions are designed and simulated complying with the benchmark obtaining passive and semiconductor components ratings in order to perform a comparison in terms of size and cost. A discussion of the analyzed topologies regarding the obtained ratings as well as ground currents is presented. Recommendations for topological solutions complying with the application benchmark are provided.
406 citations
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TL;DR: In this paper, a brief introduction of the different types, applications and typical electrical characteristics of fuel cells is presented, followed by an examination of the various topologies of DC-DC boost converters and inverters used for power conditioning of fuel cell.
Abstract: Fuel cells are considered to be one of the most promising sources of distributed energy because of their high efficiency, low environmental impact and scalability. Unfortunately, multiple complications exist in fuel cell operation. Fuel cells cannot accept current in the reverse direction, do not perform well with ripple current, have a low output voltage that varies with age and current, respond sluggishly to step changes in load and are limited in overload capabilities. For these reasons, power converters are often necessary to boost and regulate the voltage as a means to provide a stiff applicable DC power source. Furthermore, the addition of an inverter allows for the conversion of DC power to AC for an utility interface or for the application of an AC motor. To help motivate the use of power conditioning for the fuel cell, a brief introduction of the different types, applications and typical electrical characteristics of fuel cells is presented. This is followed by an examination of the various topologies of DC-DC boost converters and inverters used for power conditioning of fuel cells. Several architectures to aggregate multiple fuel cells for high-voltage/high-power applications are also reviewed.
226 citations
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TL;DR: In this paper, a review of the recent advances of power electronics that includes power semiconductor devices, converters, machines, drives and control is incorporated in the paper, and a prognosis for the 21st century has been outlined.
Abstract: The technology of power electronics has gone through rapid technological advancement during the last four decades, and recently, its applications are fast expanding in industrial, commercial, residential, military and utility environments. In the global industrial automation, energy conservation and environmental pollution control trends of the 21st Century, the widespread impact of power electronics is inevitable. The paper begins with a discussion on the global energy generation scenario and the corresponding environmental pollution problem. The mitigation of this problem is then discussed with particular emphasis on energy saving with the help of power electronics. A brief but comprehensive review of the recent advances of power electronics that includes power semiconductor devices, converters, machines, drives and control is incorporated in the paper. Finally, a prognosis for the 21st Century has been outlined.
222 citations
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