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- 实验方案
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[IEEE 2018 IEEE Energy Conversion Congress and Exposition (ECCE) - Portland, OR, USA (2018.9.23-2018.9.27)] 2018 IEEE Energy Conversion Congress and Exposition (ECCE) - A Novel Differential Power Processing Architecture for a Partially Shaded PV String Using Distributed Control
摘要： This paper proposes a differential power processing (DPP) architecture applied to a series PV string which enables each PV element to operate at its local maximum power point (MPP) while processing only a small portion of its total generated power through the module integrated converters (MICs). The current processed through each converter is the difference between the local PV element MPP current and the local PV string current. This feature allows for a reduced current stress on the MIC components relative to the most common DPP topology. Thus, a higher system efficiency is realized at a reduced cost. A state space model of the proposed system is derived, and a comparison analysis is carried out with respect to the conventional DPP architectures. Additionally, a modular and compact design is proposed for a large number of PV panels in a series PV string. A hardware prototype is designed and built for 3 PV panels connected in series to validate the proposed architectures effectiveness and experimentally demonstrate its robustness. The modularity of the system is also tested to ensure low current and voltage stress on the MICs.
关键词： Distributed Control,maximum power point tracking (MPPT),Differential Power Processing,DC-DC Converters,Photovoltaic (PV) String,Partial Shading
更新于2025-09-23 15:19:57
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[IEEE 2020 IEEE International Conference on Power Electronics, Smart Grid and Renewable Energy (PESGRE) - Cochin, India (2020.1.2-2020.1.4)] 2020 IEEE International Conference on Power Electronics, Smart Grid and Renewable Energy (PESGRE2020) - Maximum Power Point Tracking for Photovoltaic-Fed Multi-Source Switched Capacitor Based Multilevel Inverter
摘要： In this paper, a shifting carrier based maximum power point tracking (MPPT) algorithm for multisource converters is proposed. This MPPT algorithm is explained for both low frequency (constant carrier) and high frequency (triangular) carrier signals. The proposed algorithm is applied for a single stage multisource switched capacitor based multilevel inverter for grid connected and stand-alone photovoltaic applications. This converter features high gain, less component count, self capacitor charge balancing, better dispersed value of sources and increased source utilization. The importance of selecting an appropriate pulse width modulation technique for switched capacitor based inverters in order to maintain the capacitor charging time is explained. The proposed technique is able to track the maximum power under varying irradiance levels. The experimental results of the proposed algorithm is presented. The MPPT technique is analyzed and veri?ed in simulation for stand-alone and grid connected applications using MATLAB/Simulink platform.
关键词： multilevel inverter,Switched capacitor based converter,maximum power point tracking
更新于2025-09-23 15:19:57
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[IEEE 2019 IEEE 46th Photovoltaic Specialists Conference (PVSC) - Chicago, IL, USA (2019.6.16-2019.6.21)] 2019 IEEE 46th Photovoltaic Specialists Conference (PVSC) - Reduced-order Aggregate Model for Parallel-connected Grid-tied Three-phase Photovoltaic Inverters
摘要： Ratings of utility-scale grid-tied photovoltaic (PV) inverters are typically no more than 1 MVA. This implies that a large number of inverters are usually installed in utility-scale PV energy-conversion systems. Given the complexity of inverter dynamic models (typical models are high dimension and nonlinear), reduced-order models for inverters are critical for performance assessment and accurate representation of PV-system dynamics in the bulk power grid with limited computational burden. In this paper, we formulate a reduced-order model for parallel-connected grid-tied three-phase PV inverters that has the same structure and model order as a single inverter. We adopt a single-diode model for the PV modules, and each inverter is assumed to be a single-stage dc-ac voltage-source converter with an input dc-link capacitor and an LCL output filter. The control architecture includes a maximum power point tracking (MPPT) algorithm, a dc-link voltage controller, a reactive power controller, a current controller, and a phase-locked loop for grid synchronization. Numerical simulations demonstrate the computational benefits and accuracy of the reduced-order model.
关键词： photovoltaic inverter,Maximum power point tracking,three-phase inverter,model reduction
更新于2025-09-23 15:19:57
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Robust design of type-2 fuzzy logic-based maximum power point tracking for photovoltaics
摘要： Photovoltaic (PV) power generation is uncertain and intermittent due to varying insolation and temperature. The Maximum Power Point Tracking (MPPT) algorithm implemented in a DC/DC converter ensures maximum PV power generation for a given insolation and temperature. This paper proposes a novel method to achieve this optimization under uncertainty: (1) An Interval Type-2 Fuzzy Logic System (IT2FLS) is used to tune the duty cycle of a DC/DC converter. The control gains and IT2 membership functions are tuned optimally using approximate gradient-descent algorithm. The so-called footprint of uncertainty (FOU) in the IT2 membership functions ensures that the IT2FLS is more powerful than traditional FLS in dealing with noise and uncertainty. (2) Taguchi’s orthogonal scenarios are used to evaluate the PV power generations by considering different meteorological conditions. Signal-to-noise ratios (SNR) obtained from Taguchi’s experiments are then analyzed by average effect of all control factor levels and main effect of each control factor to achieve the robust design of control gains and IT2 fuzzy membership functions. The proposed method is implemented using a DSP Chip-in-the-Loop (DIL) simulation through a real-time simulator OPAL-RT (OP5600) and TI DSP Chip (eZdsp TMS320F28335). A standalone PV system with a boost converter and load is used to demonstrate the practical applicability of the proposed method.
关键词： Maximum power point tracking,Taguchi method,Interval type-II Fuzzy logic,Photovoltaics
更新于2025-09-23 15:19:57
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High Voltage Gain Three Coupled Winding DC-DC Interleaved Boost Converter with Arduino Microcontroller for the PV Panel Control
摘要： In many applications, high-step converters are widely used, including powered vehicles, Photovoltaic (PV) systems, continuous power supplies, Gas lighting and fuel cell systems. The most important requirements in the energy conversion process are reliability, quality, maintenance and size reduction. This paper presents an Interleaved Boost Converter (IBC) to raise voltage gain with three coupled winding. This converter consists of three pairs of coupled inductors to collect energy in parallel and release energy to the series load, which provides a much higher output load voltage than the traditional DC-DC boost converter. To validate the performance, an investigation was introduced by means of steady state analysis and operation. The operation modes and mathematical analysis are presented. Arduino UNO microcontroller was used to implement Pulse Width Modulation (PWM) gate drive based on Maximum Power Point Tracking (MPPT). The DC-DC IBC with High Voltage Gain (HVG) produces low voltage stress across switches, low input and output current ripple, and also improves the efficiency. These features made this converter suitable for applications where a high voltage gain is demanded. This converter was tested using Matlab/Simulink to validate the performance in terms of input and output ripples. The results supported the mathematical analysis. The cancelation of the ripple in input and output voltages has significantly detected. The ripple amplitude is reducing in DC-DC HVG IBC comparing with traditional DC-DC boost converter, and the ripple frequency is doubled. This tends to reduce the output filter losses, and size. Also improves the efficiency of the converter.
关键词： High voltage gain,Current and Voltage sensors,Arduino UNO Microcontroller,Low input and output ripples,Ferrite core,Maximum Power Point Tracking,Interleaved Boost Converter
更新于2025-09-23 15:19:57
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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) - Design and Simulation of Multi-phase Multi-stage Interleaved Boost Converters for Photovoltaic Application
摘要： This paper presents a new design of multi-stage multi-phase for Interleaved Boost Converters (IBCs) controlled by MPPT technqiue for each power switch. As the PV output current is usually high, the ?rst-stage is designed with four-phase IBC to absorb the high current and deliver the utmost power with less stress on switches and less components size. The current for the next stage is lower that makes three-phase IBC and two-phase IBC for the last stage. The simulation results approve the effectiveness of the modeling and analysis and verify that the proposed system design is suitable for PV application feeds a high voltage devices with less stress, less input current ripple, less output voltage ripple, and suf?cient ef?ciency.
关键词： Interleaved boost converter,multi-stage converter,Photovoltaic,maximum power point tracking
更新于2025-09-23 15:19:57
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A novel photovoltaic maximum power point tracking technique based on grasshopper optimized fuzzy logic approach
摘要： The maximum power point tracking (MPPT) in the PV system has become complex due to the stochastic nature of the load, intermittency in solar irradiance and ambient temperature. To address this problem, a novel Grasshopper optimized fuzzy logic control (FLC) approach based MPPT technique is proposed in this paper. In this proposed MPPT, grasshopper optimization is used to tune the membership functions (MFs) of FLC to handle all uncertainties caused by variable irradiances and temperatures. The performance of the proposed grasshopper optimized FLC based MPPT is studied under rapidly changing irradiance and temperature. The proposed MPPT overcomes the limitations such as slow convergence speed, steady-state oscillations, lower tracking ef?ciency as encountered in conventional methods viz. perturb & observed (P&O) and FLC techniques. The feasibility of the proposed MPPT is validated through experimentation. The effectiveness of the proposed scheme is compared with P&O and also with FLC MPPT.
关键词： Maximum power point tracking,PV system,Fuzzy logic control,Membership functions,Grasshopper optimization
更新于2025-09-23 15:19:57
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Control methodology and implementation of a Z-source inverter for a stand-alone photovoltaic-diesel generator-energy storage system microgrid
摘要： This paper deals with the control and implementation of a bidirectional Z-source inverter for a photovoltaic-diesel generator-energy storage hybrid system. The proposed control strategy is based on the voltage regulation across one of the Z-network capacitor (Vcz), through a buck-boost converter of the storage system side. In some critical situations, where the load power is important, the Vcz voltage regulation is no longer able to ensure the duration of the necessary state shoot-through for the maximum power point tracking achievement. In this context, the diesel generator can therefore be solicited to ensure the shoot-through duration and achieve maximum power point tracking so that it can be used more advantageously without any harmful e?ects on the Z-source inverter operation. The e?ectiveness of the proposed control strategy is evaluated and validated by extensive simulations and experiments.
关键词： Energy maximum power point tracking (MPPT),Hybrid system,Microgrid,Photovoltaic generator,Z-source inverter,Diesel generator,Energy storage system
更新于2025-09-23 15:19:57
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A photovoltaic powered electrolysis converter system with maximum power point tracking control
摘要： One of the main problems for renewable and other innovative energy sources is the storage of energy for sustainability. This study focuses on two different scenarios to benefit from solar energy more efficiently. Photovoltaic (PV) energy is converted to the desired voltage level using a buck converter for generating hydrogen with electrolysis process. A maximum power point tracking (MPPT) algorithm is used to benefit from the photovoltaic sources more efficiently. The basic electrolysis load for hydrogen production needs low voltage and high current and controlled sensitively to supply these conditions. The photovoltaic powered buck converter for electrolysis load was simulated in MATLAB/Simulink software using a perturb and observe (P and O) MPPT algorithm and PI controller. The simulation results show that in normal, short circuit and open circuit working conditions the PV and load voltages are stabilized. The efficiency of the proposed system is reached more than 90% for high irradiance levels.
关键词： Maximum power point tracking,Electrolysis process,Hydrogen energy generation from PV,DC-DC buck converter,Perturb and observe method,Proportional integral control
更新于2025-09-23 15:19:57
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Enhanced Power Output from the PV with Low Input Ripple DC-DC Converter
摘要： The primary objective of Maximum Power Point Tracking (MPPT) for PV systems connected to a low-voltage DC grid is to extract the maximum possible power output from the PV array. Normally high-frequency switched mode power converters are employed to track the maximum power. These converters, however, impose switching frequency voltage ripple on the PV output. This causes fluctuation around the Maximum Power Point (MPP) and results in power loss. These losses can be reduced using electrolytic capacitors, however, the electrolytic capacitors’ lifespan is relatively shorter than that of a PV panel. In this paper, an interleaved boost converter is used to reduce high-frequency voltage ripple introduced on panel. Hence, smaller values of longer lifespan capacitors such as film capacitors will be sufficient to curtail the smaller ripple. Moreover, film capacitors are selected based on voltage ripple. Analysis was carried out for calculating voltage ripple imposed on PV module to select input filter more precisely. In addition, reduction in the voltage ripple is calculated quantitatively and is compared with that of a conventional boost converter. Enhanced power output from the PV panel is mathematically proven and experimentally demonstrated.
关键词： photovoltaic panel,switching frequency voltage ripple,PV output power,electrolytic capacitors,film capacitor,maximum power point tracking (MPPT),interleaved boost converter (IBC),low-voltage dc grid,DC-DC converter,photovoltaic (PV) system
更新于2025-09-19 17:15:36