- 标题
- 摘要
- 关键词
- 实验方案
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Adaptive Observer-based Control Strategy for Maximum Power Point Tracking of Uncertain Photovoltaic Systems
摘要： This work presents an adaptive observer-based control strategy for maximum power point tracking (MPPT) of uncertain photovoltaic (PV) systems. On the one hand, the PVG output voltage and/or current measurements are needed for MPPT techniques and controllers design and, on the other hand, the PV arrays have to be installed in a site that profits from good daily sunshine. This obviously leads to difficulty of PVG output current and voltage measurement if ever such a site is at great distance from the converter. Furthermore, the MPPT control accuracy could be significantly affected due to the cable parameters if only voltage and current measurements on the converter side of the cable are instead used. To overcome this issues, an adaptive extended Kalman–like observer providing estimates of PVG output current and voltage regardless of cable resistance and inductance deviations, is first designed. Afterwords, a backstepping controller is synthesized to ensure the MPPT objective. The designed adaptive observer-based MPPT control convergence is formally analyzed and its effectiveness in compensating for cable parameters uncertainties on the MPPT accuracy is validated through numerical simulations.
关键词： Photovoltaic,Adaptive extended Kalman like observer,Backstepping control,Uncertainty,MPPT
更新于2025-09-16 10:30:52
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Adaptive Extended Kalman–like Observer for Uncertain Photovoltaic Systems
摘要： The problem of state and parameter estimation in photovoltaic (PV) systems is addressed. The maximum power point tracking (MPPT) techniques and controllers design involve the PV generator (PVG) delivered voltage and current. However, in situations where PV arrays are located in a remote site from the control unit of the converter, so as to profit from good solar radiation, PVG voltage and current measurements become difficult. From other side, the use of long PV cable between the PVG and the converter would produce substantial voltage drops in the cable, which would consequently result in MPPT control inaccuracies if only voltage and current sensed in the converter input side of the cable are used instead. To avoid this problem, an adaptive Kalman–like observer for PV systems is designed, in this paper. Using only voltage and current measurements in the converter input, the observer performs online estimation of the PVG output voltage and current as well as of the cable resistance and inductance, regardless of these parameters uncertainties. The convergence of the system state and parameters is shown by simulation.
关键词： Photovoltaic,Adaptive extended Kalman like observer,Uncertainty,MPPT,Cable
更新于2025-09-16 10:30:52
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[IEEE 2019 2nd International Conference on Power Energy, Environment and Intelligent Control (PEEIC) - Greater Noida, India (2019.10.18-2019.10.19)] 2019 2nd International Conference on Power Energy, Environment and Intelligent Control (PEEIC) - Power Quality Enhancement of Soft Computing FLC MPPT Based Standalone Photovoltaic System
摘要： Single phase system has been secured with Photovoltaic system based on Fuzzy Logic Control based perturbed & observed (P&O) maximum power point tracking phenomenon with active power filter (APF) connected to a nonlinear load. The conventional Perturbed & Observed algorithm is used to achieve maximum power output from Photovoltaic array, Proportional Integral controller with positive sequence detector phase locked loop(PLL) synchronization are implemented to generate reference current. It is emplyed to generate switching signal for VSI in hysteresis band current controlled (HBCC). DC link of PWM converter is controlled with switch controlled of VSI inverter. In proposed work minimize harmonic distortion present in source current due to power electronic based nonlinear load. Total current harmonic distortion (THD) is reduced by shunt active power factor and power factor improve after compensation reactive power supplied by system reduce and active power of system increase. The system designed with MATLAB/SIMULINK 2015(a) platform.
关键词： Shunt Active Power Filter (SAPF),Photovoltaic Array (PVA),Maximum Power Point Tracking (MPPT),PWM Converter,Boost Converter,Fuzzy logic Control (FLC),Proportional Integral controller (PI)
更新于2025-09-16 10:30:52
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[IEEE 2019 Innovations in Power and Advanced Computing Technologies (i-PACT) - Vellore, India (2019.3.22-2019.3.23)] 2019 Innovations in Power and Advanced Computing Technologies (i-PACT) - A Generalized MPPT Controlled DC-DC Boost Converter for PV System Connected to Utility Grid
摘要： This paper presents a Generalized MPPT control based DC-DC boost converter to generate continuous power with its preserved dynamic control system. The PV array is modeled with algebraic loop to achieve accurate solution with iterations in large sample of times. The larger time steps are utilized in this model to obtain fast simulation. MPPT controller embedded with Generalized P and O technique in PV system to regulate duty cycle through which maximum continuous power will be obtained. The MPPT controller with proposed converter is designed in a strategy to extract continuous power regardless of irradiance and temperature. 100kW PV array connected 25kV utility grid is examined in MATLAB SIMULINK and compared with other models in available literature to show effectiveness of designed model.
关键词： MPPT controller,Boost Converter,PV System,PV array,P&O technique
更新于2025-09-16 10:30:52
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Optimization strategy for high efficiency 20?kW-class direct coupled photovoltaic-electrolyzer system based on experiment data
摘要： For the first time worldwide, the PEM electrolyzer directly coupled with the up-to-20 kW PV panels to produce hydrogen is reported as a demonstration of a high solar-to-hydrogen (STH) efficiency CO2-free hydrogen-production system. With the direct-coupling configuration, the power loss on an interlink DC/DC converter and its cost are avoided as known. Since the maximum power point (MPP) of PV unit is fluctuated by the fluctuating irradiance, this MPP is tracked by changing the number of the electrolyzer cell controlled by the MPPT algorithm, which allows changing the PV operating voltage. In our system, the averaged PV efficiency is 17.2%, and the electrolysis efficiency is 86.5% in a whole-day test. Thus, the STH efficiency is 14.9%. The hydrogen generation capacity of 18.6 Nm3 (5.01 kg CO2 reduction) is demonstrated in that whole-day test. Besides, the method to make the simulation model of the system from on-site data is shown. As a result, neither the preliminary test nor off-site test is needed. Therefore, this method can be used to check the condition of the entire system and each component in long-term operation which has never been found in the literature. The simulated model can also be used to investigate the PV-electrolyzer system.
关键词： Direct coupling,MPPT,Water electrolyzer model,Photovoltaic model,Hydrogen producing
更新于2025-09-16 10:30:52
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[IEEE 2019 IEEE International Conference on Intelligent Techniques in Control, Optimization and Signal Processing (INCOS) - Tamilnadu, India (2019.4.11-2019.4.13)] 2019 IEEE International Conference on Intelligent Techniques in Control, Optimization and Signal Processing (INCOS) - Implementation of Particle Swarm Optimization for Maximum Power Absorption From Photovoltaic System Using Energy Extraction Circuit
摘要： The focus of this paper, improvements in universal rules have seen the thrust for larger use of non-conventional energy sector. To absorb the maximum power output from the solar photovoltaic (PV) panel, Particle Swarm Optimization (PSO) based Maximum Power Point tracking (MPPT) control algorithm is suggested. At a specific operating point, PV panel can harvest maximum power called Maximum Power Point (MPP) in which the solar PV panel must operate at this MPP to give maximum efficiency. In this paper, the capability of the PV panel to track the MPP using PSO under great variation of insolation has been modelled and analyzed in MATLAB/SIMULINK.
关键词： Photovoltaic (PV) panel,Particle Swarm Optimization (PSO),Maximum Power Point tracking (MPPT)
更新于2025-09-16 10:30:52
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[IEEE 2019 International Conference on Power Electronics, Control and Automation (ICPECA) - New Delhi, India (2019.11.16-2019.11.17)] 2019 International Conference on Power Electronics, Control and Automation (ICPECA) - Droop based Low voltage ride through implementation for grid integrated photovoltaic system
摘要： This paper signi?es the development of an ef?cient and cost-effective control scheme for operation of grid integrated photovoltaic (PV) system under low voltage ride through (LVRT) condition. During LVRT If the PV system was to disconnect from the grid, the disconnection further aggravates the situation by causing larger disturbance than what was caused by the fault. To stabilize the system and prevent the ?ow of over current during LVRT it is necessary to control the reactive power injection in the system. The proposed scheme balances the active power though proportional gain regulation of plug in controller. Compared to the conventional LVRT method, this method is more cost effective. A normal maximum power point tracking (MPPT) scheme is implemented during normal operation. But in case of fault condition, an extra proportional controller is added to assist the droop characteristics of photovoltaic power voltage curve and attain system stability. Simulation has been performed on a grid integrated PV system of 4kW and LVRT conditions are tested. It is observed that the response of controller is fast and seamless during transition mode.
关键词： Active power control,Grid integrated photovoltaic(PV) system,Maximum power point tracking (MPPT),Droop characteristics,Low voltage ride through,Reactive power injection
更新于2025-09-16 10:30:52
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[IEEE 2019 22nd International Conference on Electrical Machines and Systems (ICEMS) - Harbin, China (2019.8.11-2019.8.14)] 2019 22nd International Conference on Electrical Machines and Systems (ICEMS) - The Simulink of a stacked Large-Scale Photovoltaic Power Generation System
摘要： In traditional photovoltaic power generation system, the low voltage side (not more than 1kV) is connected to the inverter through a photovoltaic combiner box, and then delivered the power to the grid through a power frequency transformer. However, the system has high transmission loss, Low penetration of MPPT and high cost. This paper proposes a stacked photovoltaic power generation system structure, where each PV array is input into each bidirectional DC/DC converter independently, and the output side of the bidirectional DC/DC converter is connected in series to the input terminal of the three-phase full-bridge modular multilevel converter, finally achieve to connect the high voltage grid. The work in this paper, a simulation model of 10kV/100kW photovoltaic power generation system is built in MATLAB/Simulink platform, in order to verify the feasibility and reliability of the proposed system structure and control strategy.
关键词： DAB,PV array,Simulation,MMC,MPPT
更新于2025-09-16 10:30:52
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Propose a MPPT Algorithm Based on Thevenin Equivalent Circuit for Improving Photovoltaic System Operation
摘要： Smart grids are considered as key solutions to solve current power security issues. Among these suggestions, microgrid is proposed to integrate distributed generations (DGs) such as photovoltaic (PV) system into the network and the control of DGs output power is getting more attention. The output power of PV arrays with nonlinear characteristics is affected by temperature, solar irradiation and load. Various maximum power point tracking (MPPT) methods for photovoltaic (PV) power systems have been considered and developed to maximize the delivered possible power. In this paper, a modelized photovoltaic source is introduced, based on the Thevenin equivalent circuit. An ordinarily employed solar system model is linearized into simple Thevenin source-resistance representation. Next, a control algorithm associated with the relationship between controller’s PWM duty cycle of the MPPT boost converter and solar array output power, namely proposed MPPT algorithm, is introduced. This proposed method is compared with an existing popular MPPT algorithm to confirm its superior performance by using the MATLAB/SIMULINK? simulation. The results show an improvement in the power generation from a PV array in any weather condition, and also help to reduce the impact of rapid change of solar irradiation on the output power variation within the time duration of change. Therefore, the proposed algorithm reduces the effect on grid frequency and motivate the PV generation penetration into the microgrids. Finally, a 50W DC-DC boost converter prototype is implemented and tested to verify the feasibility of the proposed control scheme.
关键词： photovoltaic (PV),renewable energy source,perturbation and observation method (P&O),thevenin equivalent circuit,maximum power point tracking (MPPT)
更新于2025-09-16 10:30:52
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Maximum power point tracking in photovoltaic systems under different operational conditions by using ZA-INC algorithm
摘要： Today, environmental pollution has increased due to excess use of fossil resources. Amidst, renewable energy resources, solar energy is one of the infinite, clean and accessible options. Each solar cell has a unique operating point which is called maximum power point. Considering nonlinearity of I–V and P–V curves of Photovoltaic (PV) resources, their delivered power depends on operating point of the PV. That is, for changes in temperature or irradiation, some actions should be taken to obtain maximum operating point which is called maximum power point tracking (MPPT). This paper tries to configure power circuit using distributed maximum power point tracking (DMPPT) with a fly-back converter, optimize power and reduce fluctuations around maximum power point. MPPT is analyzed through simulation using P&O, INC and zero fluctuation, adaptive step, increasing (ZA-INC) guidance algorithms in two steps including variable irradiation with constant temperature and variable temperature with constant irradiation using DMPPT and centralized MPPT. In DMPPT scheme using ZA-INC algorithm, power is optimized, losses are reduced, fluctuations around maximum power point are reduced, gain and tracking speed are increased.
关键词： MPPT,Weather conditions,Photovoltaic,ZA-INC algorithm,Flyback converter
更新于2025-09-12 10:27:22