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[IEEE 2020 2nd International Conference on Innovative Mechanisms for Industry Applications (ICIMIA) - Bangalore, India (2020.3.5-2020.3.7)] 2020 2nd International Conference on Innovative Mechanisms for Industry Applications (ICIMIA) - A Single-Phase Switched-Boost Inverter for Photovoltaic System
摘要： A single-phase switched-boost inverter for photovoltaic (PV) application is introduced in this paper. Shoot-through immunity, buck/boost voltages, continuous input current and single-stage conversion are the benefits of the proposed inverter. PV panel output voltage depends upon the weather conditions. Sometimes the output voltage of the PV panel is less. Therefore, we need boost inverter to get the desired voltage to the load. In addition, the proposed inverter has acceptance for wide range of supply voltage variations. In comparison with quasi Z-source inverter (qZSI), the proposed inverter requires one less inductor. The operating principles, control strategy, comparison with qZSI and simulation results are discussed. The simulation results match the theoretical analysis.
关键词： Boost Inverter,shoot-through,quasi-Z-source inverter (qZSI),single-stage
更新于2025-09-23 15:21:01
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Nested control loop design for differential boost inverter using generalized averaged model in photovoltaic applications
摘要： To use photovoltaic energy, voltage source inverters are playing an important role. The most of local AC loads such as AC motors need higher voltage than solar panel output voltage. Differential boost inverter produces an AC voltage that is greater than the DC input voltage in a single power stage. This inverter consists of two DC-DC bilateral boost converters in which work via time-variant duty cycles to produce sinusoidal voltage, and this feature causes complexity in control design. To deal with this complexity, new modeling so-called generalized averaged model is used to achieve a linear time-invariant model. In this paper, a nested control loop is designed. This control strategy consists of two control loops in which the inner loop is designed by linear quadratic regulator theory to displace poles in proper location and the second loop uses a PI-PR controller to track desired voltage and reject disturbances. To evaluate the proposed control method, the sliding mode controller is applied and compared as well. As shown by simulations, the proposed control strategy has more reliable performance and provides higher robustness in comparison with sliding mode control technique in rigid situations such as dealing with nonlinear load, parameters values changes, and external disturbances.
关键词： PI-PR,renewable energies,boost inverter,linear quadratic regulator,generalized averaged model
更新于2025-09-23 15:21:01
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[IEEE 2018 International Conference on Electrical Sciences and Technologies in Maghreb (CISTEM) - Algiers, Algeria (2018.10.28-2018.10.31)] 2018 International Conference on Electrical Sciences and Technologies in Maghreb (CISTEM) - Comparison between existing transformer-less PV inverter topologies
摘要： 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 small-scale 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.
关键词： Boost Inverter,Transformer-less Inverter,PV Inverter,PV inverter topologies
更新于2025-09-19 17:15:36
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[IEEE 2019 6th International Conference on Advanced Control Circuits and Systems (ACCS) & 2019 5th International Conference on New Paradigms in Electronics & information Technology (PEIT) - Hurgada, Egypt (2019.11.17-2019.11.20)] 2019 6th International Conference on Advanced Control Circuits and Systems (ACCS) & 2019 5th International Conference on New Paradigms in Electronics & information Technology (PEIT) - Photovoltaic-Based Interconnected-Modified DC-Nanogrids within an Open Energy Distribution System
摘要： A DC nano-grid is typically intended as a reliable scheme capable of delivering power to the local loads from distributed renewable energy resources. The conventional nano-grid uses two-separate conversion stages for feeding both ac and dc loads. But, the modified design for the dc nano-grid uses only a single-stage converter. It is based on a single-input power-electronic multi-output converter that interfaces the source with the average load requirements. It deals with a switched boost inverter (SBI) that can fed from a solar photovoltaic (PV) renewable energy source. SBI is a single-stage power converter capable of simultaneously supplying both dc and a higher or lower ac loads from a single dc input voltage source. The converter operation is also contributed by a simple model reference adaptive closed loop control technique, to fed the high output ratings steadily, especially in the critical range for its duty ratio. In addition, this paper presents a full model design for multiple interconnected nanogrids through a dc-link within a multilevel direct current (dc) scheme called an open energy distributed system (OEDS). Each nanogrid involves a switched boost inverter (SBI) providing its closed-loop control method for its dc-link voltage. Moreover, this paper involves a controller method to attain the optimum suggested power interconnected nanogrids. The proposed systems are modelled and simulated with the help of MATLAB/Simulink software package to assess the robustness of the proposed OEDS with multiple 5-Kw interconnected nanogrids fed from photovoltaic (PV) renewable energy resources.
关键词： Switched Boost Inverter (SBI),Modified - DC nanogrids,Distributed Renewable Energy Source (DRES),Open Energy Distribution System (OEDS)
更新于2025-09-19 17:13:59
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[IEEE IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society - Lisbon, Portugal (2019.10.14-2019.10.17)] IECON 2019 - 45th Annual Conference of the IEEE Industrial Electronics Society - Coupled-Inductor-Based Differential Boost Inverter with Wide Input Voltage Range for Photovoltaic Generation Applications
摘要： The differential boost inverter has been widely used as a microinverter for the renewable distributed generations as it achieves an ac voltage with amplitude larger than the dc input. However, the unlimited voltage gain of the boost inverter is practically unachievable due to the existence of the parasitic resistance of the input inductor, which narrows the input voltage range and distorts the output voltage waveform as the turn-on duty ratio of the power switches approaches unity. To solve this problem, a novel coupled-inductor-based differential boost inverter is proposed, which uses a two-winding or three-winding coupled inductor to enhanced voltage gain. As a result, the input voltage range of the proposed inverter is significantly widened, facilitating grid-connected applications with a very low dc input voltage, compatible to the outputs of most PV panels. Moreover, the leakage inductance energy of the coupled inductor is recycled with voltages across the power switches clamped to the dc link capacitor by using a lossless diode. A prototype with 30 V dc input, 155 V ac output, nominal power 200 W, was built, which achieves a high voltage-boost, while keeping relatively low voltages stresses on the semiconductor devices.
关键词： coupled-inductor boost inverter,PV generation application,leakage inductance effect,high voltage gain
更新于2025-09-16 10:30:52
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Adaptive SMC for the Second-order Harmonic Ripple Mitigation: A Solution for the Micro-Inverter Applications
摘要： There have been several advanced topologies proposed by the community for Micro-Inverter applications. However, many such applications suffer from unwanted second-order harmonic current ripple at DC input. Moreover, in the absence of suitable passive filter or ripple compensator, the second-order harmonics ripple may inject into the DC source. This results in several problems to the system; related to system efficiency, life, cost, size, reliability and stability. The paper proposes an adaptive sliding mode controller to shape the output-impedance of the boost circuit of quasi-switched boost inverter such that the propagation of the ripple from DC link to the DC input source is resisted. The quasi-switched boost inverter is one of the advanced and suitable topology for the micro-inverter applications. The adaptive nature of the proposed controller improves the transient performance of the system at the line-load transients unlike some existing solutions which affects dynamics adversely to achieve ripple mitigation objective. The controller ensures voltage regulation within 5% at DC link. The proposed control technique is verified using a lab-prototype of 500 W quasi-switched boost inverter.
关键词： Dynamic performance,Low frequency ripple,Adaptive SMC,quasi-switched boost inverter
更新于2025-09-10 09:29:36
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[IEEE 2018 International Power Electronics Conference (IPEC-Niigata 2018 –ECCE Asia) - Niigata, Japan (2018.5.20-2018.5.24)] 2018 International Power Electronics Conference (IPEC-Niigata 2018 -ECCE Asia) - A Novel Single- Stage High-Frequency Boost Inverter Cascaded by Rectifier-Inverter System for PV Grid-Tie Applications
摘要： This paper proposes a new topology for a single-phase grid-tie two-stage DC-AC boost inverter for the application of PV systems that utilize high-frequency transformer (HFT) for galvanic isolation. In the first stage, a new single-stage high-frequency boost inverter (HFBI) is proposed to boost and convert the DC output voltage of the PV modules to a high-frequency single-phase square waveform and to realize maximum power point tracking (MPPT). The second stage is rectifier-inverter system (RIS) that interfaces HFBI to the grid. Therefore, a single-phase high-frequency transformer is used to link both stages and to provide galvanic isolation between the AC and DC sides. The proposed topology has many advantages such as increasing the inverter output voltage level, MPPT, high reliability, small size and lightweight. In addition, a proportional integral current control (PI) conventional is used to inject a sinusoidal current into the grid at unity power factor. The proposed topology has been verified analytically by using PSIM software and experimentally by using a laboratory prototype.
关键词： high frequency transformer,boost inverter,photovoltaic,grid connected
更新于2025-09-09 09:28:46