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[IEEE 2018 UKSim-AMSS 20th International Conference on Computer Modelling and Simulation (UKSim) - Cambridge, United Kingdom (2018.3.27-2018.3.29)] 2018 UKSim-AMSS 20th International Conference on Computer Modelling and Simulation (UKSim) - Design and Simulation of Solar Grid-Connected Charger for Electric Vehicles
摘要： The paper presents a solar-powered electric vehicle (EV) charging station designed for green energy utilization. The system integrates photovoltaic (PV) panels, DC-DC power converters, and inverters to convert solar energy into usable power for EVs. A simulation model is developed to analyze the charging process, energy efficiency, and grid interaction. Results show that the system can effectively charge multiple EVs with minimal grid dependency, promoting sustainable transportation. The design includes calculations for voltage, current, and power ratings, validated through simulation comparisons.
关键词： Inverters,Simulation,Green design,Electric Vehicles,Charging stations,DC-DC power converters
更新于2025-09-23 15:22:29
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A Parameter Estimation based MPPT Method for a PV System using Lyapunov Control Scheme
摘要： There are two types of external variations which change the operating point of a photovoltaic (PV) system: one is environmental change caused by variation in temperature and/or irradiance and the other is load change. The variation in environmental condition changes the PV array characteristic itself whereas the load variation changes the operating point within the same curve. Each type of change can be uniquely identified using history of PV voltage and current measurements. Using the above fact, this paper proposes a fast maximum power point tracking (MPPT) technique for PV array coupled with boost converter. The proposed method determines MPP in a single step by finding out temperature and irradiance at which the PV array is operating. Furthermore, based on the measured values of PV voltage and current, inductor current and load voltage are also calculated, eliminating the need for additional sensors. Lyapunov based controller (LBC) is implemented to track inductor current to its desired value and find the desired duty cycle to reach MPP. The proposed method is validated by both simulation and experimental results under varying temperature, irradiance and load condition. A comparison with the existing MPPT method is also presented in order to show the efficacy of the proposed method.
关键词： MPPT,DC-DC converters,Lyapunov Function,Incremental Conductance,PV cell,Parameter Estimation
更新于2025-09-23 15:21:21
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[IEEE 2018 IEEE Innovative Smart Grid Technologies - Asia (ISGT Asia) - Singapore (2018.5.22-2018.5.25)] 2018 IEEE Innovative Smart Grid Technologies - Asia (ISGT Asia) - Matrix Converter for Grid Connected Wind Energy Conversion Systems
摘要： Among the renewables, wind is a cost effective energy source. This paper describes the use of a matrix converter for permanent magnet synchronous generator (PMSG) based grid connected wind turbine systems. A simulation model has been developed using MATLAB/Simulink environment. The system comprises a wind turbine, a PMSG, and a 3-phase matrix converter which acts as an interface between the wind turbine system and the electric power grid. The proposed system can also be used in small scale wind turbine systems that can be employed in environment friendly homes. Simulation results are presented to verify the operation and performance of the proposed system.
关键词： Power converters (PC),Matrix converter (MC),Permanent magnet synchronous generator (PMSG),Wind energy conversion system (WECS)
更新于2025-09-23 15:21:21
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[IEEE 2020 IEEE Texas Power and Energy Conference (TPEC) - College Station, TX, USA (2020.2.6-2020.2.7)] 2020 IEEE Texas Power and Energy Conference (TPEC) - A Simplified DC Capacitor Active Voltage-Balance Algorithm with Common-Mode Voltage Reduction using Active-Zero SVPWM for Three-Level Photovoltaic Grid-Tie Inverter Application
摘要： This paper introduces a digitally controlled single-phase rectifier with power factor correction (PFC) based on a modified three-level boost converter topology. In comparison with the conventional boost-based systems, the new PFC rectifier has about three times smaller inductor and significantly lower switching losses. The improvements are achieved by replacing the output capacitor of the boost converter with a nonsymmetric active capacitive divider, with a 3:1 division ratio, and by utilizing the downstream converter stage for the capacitive divider’s center-tap voltage regulation. The nonsymmetric voltage divider and applied switching sequence effectively provide four-level converter behavior using the same number of components as three-level converters. As a result, a 66% reduction of the inductor compared to the conventional boost-based PFC and a 33% compared to the standard three-level solutions operating at the same effective switching frequencies are also achieved. Experimental results obtained with a 400 W, 200 kHz, universal input voltage (85 Vrms –265 Vrms) PFC prototype demonstrate three times smaller inductor current ripple than that of the conventional boost converter allowing for the same inductor reduction. Efficiency improvements of up to a 6% are also demonstrated.
关键词： boost converter,power factor correction (PFC),multilevel converters,AC-DC converters
更新于2025-09-23 15:21:01
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[IEEE 2019 IEEE 2nd British and Irish Conference on Optics and Photonics (BICOP) - London, United Kingdom (2019.12.11-2019.12.13)] 2019 IEEE 2nd British and Irish Conference on Optics and Photonics (BICOP) - A Two-Tier Inverse Taper based Vertical Coupler for Photonic Integrated Circuits
摘要： A low-loss, compact, two-tier spot size-converter (SSC) has been designed and demonstrated to couple light between silicon (Si) and silicon nitride (SiNx) platforms. The high index contrast between the materials is accomplished by matching the optical mode impedance of Si and SiNx. This allows the achievement of record low coupling loss of 0.058 ± 0.01 dB per transition at 1525 nm. The geometric parameters of the vertically integrated SSC were optimized to ensure the adiabatic transition of the optical mode from Si-to-SiNx and vice-versa. The SSC converter shows excellent broadband coupling over 100 nm bandwidth at telecom wavelengths.
关键词： spot size converters,two-tier tapers,vertical coupling
更新于2025-09-23 15:21:01
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A hybrid output multiport converter for standalone loads and photovoltaic array integration
摘要： Multiport converters (MPCs) are relatively recent power converter structures, which bestow the merits such as the omission of redundant power stages, centralized control, compact packaging, enhanced efficiency, improved reliability, and so on and have larger potential in domestic applications. They have the ability to amalgamate energy sources such as photovoltaic (PV) sources and battery storages, and can accommodate hybrid (ac and dc) domestic loads (bulbs, fans, induction stoves, and electric bike chargers). Hence, they can replace the conventional off-line uninterruptible power supplies, which are habitually used in domestic applications. The unique feature of MPCs is the ability to transfer the power between multiple sources and loads concurrently/independently. This article proposes cascaded sources switched tapping multi-level DC-link inverter (CSSTMLDCLI) involved hybrid loads MPC, which can integrate PV sources and feed above mentioned hybrid domestic loads. The involved novel seven level multilevel inverter structure, the CSSTMLDCLI has reduced component count to offer a high quality ac output, while the dc output is synthesized by a forward converter structure. The working principle of the CSSTMLDCLI along with the systematic design procedure is presented. The validity and effectiveness of the proposed converter are ratified through both MATLAB? Simulink R2016a simulation and the experimentation for a typical solar, battery, and grid supported domestic power backup. The system is managed for a lesser energy purchase using a developed minimal grid usage energy management system, which is implemented using ALTERA QUARTUS II 12.0SP2, field-programmable gate array processor.
关键词： hybrid load MPC (HLMPC),photovoltaic (PV),cascaded sources switched tapping multilevel DC-link inverter (CSSTMLDCLI),multilevel inverters (MLI),pulse width modulation (PWM),multiport converters (MPC)
更新于2025-09-23 15:21:01
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A CMOS-Based Energy Harvesting Approach for Laterally Arrayed Multibandgap Concentrated Photovoltaic Systems
摘要： This article presents an energy harvesting approach for a concentrated photovoltaic (CPV) system based on cell-block-level integrated CMOS converters. The CPV system, built upon the laterally arrayed multibandgap (LAMB) cell structure, is a potentially higher-efficiency and lower-cost alternative to traditional tandem-based systems. The individual cells within a sub-module block are connected for approximate voltage matching, and a multi-input single-output (MISO) buck converter harvests and combines the energy while performing maximum power point tracking (MPPT) locally for each cell type. A miniaturized MISO dc–dc prototype converter operating at 10 MHz is developed in a 130 nm CMOS process. For 45–160-mW power levels, the prototype converter achieves >92% nominal and >95% peak efficiency in a small (4.8 mm2) form factor designed to fit within available space in a LAMB PV cell block. The results demonstrate the potential of the LAMB CPV architecture for enhanced solar energy capture.
关键词： concentrated photovoltaic (CPV) systems,CMOS dc–dc power converters,energy harvesting,multi-input single-output (MISO) dc–dc converter,maximum power point tracking (MPPT)
更新于2025-09-23 15:21:01
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MPC Algorithm With Reduced Computational Burden and Fixed Switching Spectrum for a Multilevel Inverter in a Photovoltaic System
摘要： Renewable energy has gained significant attention of researchers in the last years, mainly due to the importance of using unlimited energy sources to supply homes, industries, cities and countries. In this context, this document focuses on the solar injection by employing a neutral point clamped (NPC) topology together with utilization of a maximum power point tracking (MPPT) and space vector modulation (SVM) techniques. Model predictive control (MPC) is employed to manage the currents and track their references. The proposed algorithms do not employ a cost function to decide which voltage to apply resulting in a spread frequency spectrum, and instead, a concentrated SVM spectrum is imposed. Notwithstanding, the DC link capacitors voltage balance is ensured and the computational burden is notably reduced as compared to traditional Finite Set Model Predictive Control (FS-MPC). Nevertheless, the consistent results are a consequence of the critical analysis that shows the feasibility of the proposal and guarantees the good performance of the entire system in simulated and experimental platforms.
关键词： Fixed switching spectrum MPC,AC-DC power converters,Fast MPC,Predictive control,Solar power generation
更新于2025-09-23 15:21:01
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Three-Legs Interleaved Boost Power Factor Corrector for High-Power LED Lighting Application
摘要： In this article, a three-leg interleaved boost Power Factor Corrector (IBPFC) converter for energy-efficient LED lighting systems connected to the main grid was discussed. This IBPFC circuit presented features 60 kHz of commutation frequency and up to 3 kW of power rating. The controlled rectifier front-end boost PFC supplied a DC/DC converter to drive power LEDs suitable for street lighting or a lighting system for a stadium, etc. The IBPFC operated in continuous current mode (CCM). The ripple impact of the IBPFC converter was analyzed and a novel methodology of inductance design was presented. In the proposed design approach, the derivative calculation of the current ripple peak compared with the derivative of the input current was used to define a critical inductance value to ensure the CCM condition. Experimental validation was provided on a 3kW prototype.
关键词： IGBT,continuous current mode (CCM),interleaved converters,three-phase boost converter,ripple analysis,high-power LED lighting,power factor correction (PFC)
更新于2025-09-23 15:21:01
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GaN Transistors for Efficient Power Conversion || Resonant and Soft-Switching Converters
摘要： The previous chapter addressed the application of GaN transistors in hard-switching power converters, and we demonstrated the benefits that GaN transistors provide – as compared to state-of-the-art silicon power MOSFETs. In this chapter, we discuss the fundamentals of resonant and soft-switching applications and evaluate the superior performance capabilities of GaN transistors over silicon MOSFETs in these applications. The chapter will conclude with a design example comparing GaN transistors and Si MOSFETs in an isolated, high-frequency 48 V intermediate bus converter (IBC) with a 12 V output, utilizing a resonant topology operating at 1.2 MHz.
关键词： power conversion,GaN transistors,resonant converters,soft-switching,silicon MOSFETs
更新于2025-09-23 15:21:01