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Design of a fuzzy current-sensor less maximum power point tracking algorithm for photovoltaic systems

IET RENEWABLE power GENERATION 2020年第18期14卷 3724-3731页

作者： Saremi, Mohammad Pourfarzad, Hamed Nemati, Milad Islamic Azad Univ Coll Tech & Engn Dept Elect Engn West Tehran Branch POB 14687-6378 Tehran Iran Univ Tehran Fac Chem Ctr Excellence Electrochem POB 14155-6455 Tehran Iran Univ Tabriz Elect Power Engn Dept Tabriz Iran

In this study, a fuzzy current-sensor less maximum power point tracking (MPPT) algorithm is presented. The algorithm proposed to improve the performance and reduce the cost of photovoltaic systems. The proposed algorithm creates the variable step-size/variable frequency specification in the drift-free single input voltage sensor (SIVS) method designing a reliable and widely used fuzzy control algorithm. The proposed algorithm will improve the SIVS methods employing the advantages of the fuzzy controllers in the MPPT algorithms based on the real and false error areas analysis concept developed by Tousi et al. (2016). The proposed method will detect exact drift conditions and move to the optimal setpoint at the maximum speed. The method selects the correct direction, appropriate step-size, and suitable control frequency to increase dynamic efficiency against the drift condition. Also, the steady-state efficiency of the algorithm will increase because of high-frequency and low-power oscillation performances. The proposed method will be simulated and compared in Matlab/Simulink environment and tested in laboratory conditions on the designed solar charge controller.

关键词： maximum power point trackers photovoltaic power systems fuzzy control maximum power point tracking algorithm photovoltaic systems drift-free single input voltage sensor method reliable used fuzzy control algorithm widely used fuzzy control algorithm SIVS methods fuzzy controllers MPPT algorithms real error areas analysis concept false error areas analysis concept exact drift conditions maximum speed appropriate step-size suitable control frequency drift condition low-power oscillation performances designed solar charge controller

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Artificial Intelligence Based maximum power point tracking algorithm for Photo-Voltaic System under Variable Environmental Conditions

Artificial Intelligence Based Maximum Power Point Tracking A...

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Conference on Recent Developments in Control, Automation and power Engineering (RDCAPE)

作者： Khan, Mohammad Junaid Mathew, Lini Natl Inst Tech Teachers Training & Res Chandigarh Chandigarh India

ISBN: (纸本)9781509039784

Solar photo-voltaic (PV) arrays have non-linear characteristics with distinctive maximum power point (MPP) which depends on environmental conditions such as irradiation and temperature. In order to obtain continuous maximum power from PV arrays under varying environmental conditions, maximum power point tracking (MPPT) control methods are employed. The fuzzy logic controller (FLC) and perturb and observe (PO) based MPPT provides maximum power from PV renewable energy sources. Simulated results show that FLC reduces the fluctuation about the MPP and provides increasing efficiency in production of electricity as compared to PO control method.

关键词： Photo-Voltaic maximum power point tracking algorithm Fuzzy Logic Controller Perturb and Observe

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A hybrid maximum power point tracking algorithm that uses the illumination and the temperature sensor in solar tracking systems 11

A hybrid maximum power point tracking algorithm that uses th...

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Conference on Nonlinear Optics and Applications XI

作者： Mroczka, Janusz Ostrowski, Mariusz Wroclaw Univ Sci & Technol Chair Elect & Photon Metrol Boleslawa Prusa 53-55 PL-50317 Wroclaw Poland

ISBN: (数字)9781510627192

ISBN: (纸本)9781510627192

Solar panels are devices that can generate electrical energy directly from the solar irradiation. This devices are one of the renewable energy sources. Therefore, big solar plants are being created on the outskirts of cities. Micro solar plants are considered by developers last days. Solar panels which consist of few modules are positioned on the roofs of buildings. Sometimes to increase amount of energy generated by the solar panel, solar tracking systems are used. In highly urbanized places the partial shading can appear on the surface of the solar panel. This is an indeterministic phenomena which is observable especially if the solar tracker is used. Partial shading reduces power generated by the system and, in the worst cases, can damage the solar panel. Therefore, the bypass diodes connected with each module or even with some part of module are used. These diodes reduce the negative impact of partial shading but can cause appearance of the local maximum power points (LMPP) on the solar panel characteristics, and only one of them is the global maximum power point (GMPP). The regular maximum power point tracking (MPPT) algorithms can track only one of the local maximum power points that are close to the current working point.

关键词： linear and non-linear ambient light sensors maximum power point tracking algorithm illumination measurement temperature measurement partial shading conditions

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Improved maximum power point tracking algorithm with cuk converter for PV systems

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The Journal of Engineering 2018年第13期2017卷 1676-1681页

作者： Zongchang Sun Zhoujun Yang School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan People's Republic of China

The maximum power point tracking (MPPT) techniques are essential for the optimisation of the efficiency in the photovoltaic (PV) systems. Here, a practical PV model is discussed and employed, and cuk converter is selected as MPPT's DC–DC converter for PV systems. Then, on the basis of the power–current ( P – I ) characteristics curve of a PV cell, an improved MPPT algorithm with direct control by using the fuzzy controller is proposed. Compared with some algorithms mentioned here, the proposed algorithm is able to track a more accurate MPP quickly and have a smaller steady-state oscillation. To validate its correctness and good performance under the varying environmental conditions, simulation study on it is carried out in MATLAB/Simulink. Also, simulation results demonstrate the proposed algorithm here is feasible and in contrast, it has a faster dynamic and more robust steady-state performance.

关键词： maximum power point trackers fuzzy control photovoltaic power systems cuk converter PV systems maximum power point tracking techniques MPPT algorithm DC–DC converter PV model maximum power point tracking algorithm fuzzy controller direct control PV cell power–current photovoltaic systems

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Adaptive predictive error filter-based maximum power point tracking algorithm for a photovoltaic system

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JOURNAL OF ENGINEERING-JOE 2016年第4期2016卷 54-61页

作者： Subudhi, Bidyadhar Pradhan, Raseswari Natl Inst Technol Dept Elect Engn Rourkela India Veer Surendra Sai Univ Technol Dept Elect Engn Sambalpur 769008 India

This study presents a new adaptive predictive error filter-based maximum power point tracker (MPPT) for a photovoltaic (PV) system. This MPPT is developed using the concept of an adaptive predictive filter (APEF) that consists of a one-tap finite impulse response. The filter step-size of the APEF is adapted using a recursive least-square (RLS) algorithm with an adaptive forgetting factor. The specialty of this MPPT is that it performs MPP tracking operation in a single step. It performs two functions: namely, MPP estimation adjusting operating point of a boost converter at MPP and then filtering of the PV voltage fluctuation after MPPT action. Thus, the proposed MPPT is compact and efficient with less computational complexities than existing MPPTs such as perturb and observe (P&O) and incremental conductance. The filter part of the proposed RLS-APEF-MPPT is a discrete PID-controller, where PD-part is tuned using pole-placement strategy and integral-term is fixed. The performances of the proposed RLS-APEF-MPPT were verified using experimentation on a prototype PV system. Its performances were compared with that of P&O, adaptive-P&O-MPPTs. From the observed results, it is confirmed that the proposed MPPT exhibits superior performance.

关键词： photovoltaic power systems adaptive filters predictive control adaptive control maximum power point trackers FIR filters recursive estimation least squares approximations computational complexity three-term control pole-placement strategy discrete PID-controller RLS-APEF-MPPT algorithm less computational complexities PV voltage fluctuation filtering boost converter MPP estimation adjusting operating point adaptive forgetting factor recursive least-square algorithm one-tap finite impulse response prototype PV system maximum power point tracking algorithm photovoltaic system APEF-based maximum power point tracker adaptive predictive error filter-based MPPT

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Comparison of the maximum power point tracking algorithms with hybrid method that uses a light sensor in the real shading conditions 11

Comparison of the maximum power point tracking algorithms wi...

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Conference on Nonlinear Optics and Applications XI

作者： Ostrowski, Mariusz Wroclaw Univ Sci & Technol Chair Elect & Photon Metrol Boleslawa Prusa 53-55 PL-50317 Wroclaw Poland

ISBN: (数字)9781510627192

ISBN: (纸本)9781510627192

Solar panels have non linear output characteristics. Therefore, there must be used a special device called the maximum power point tracker to track the voltage or the current value where the output power of the solar panel is highest. This point is called the maximum power point (MPP). Additionally, the panel consists of few parallel or series connected solar modules. To avoid negative impact of partial shading conditions, bypass diodes are used. This can complicate the detection of the maximum power point in partial shading conditions. When a solar panel is illuminated irregularly on the output characteristics the local maximum power points appear. Only one of them is the global maximum power point. There are plenty of maximum power point tracking (MPPT) algorithms in literature(1) which are different in complexity or principle of operation. Most of commonly used methods can track only one point that is close to the current working point. There are some hybrid methods that can track the global maximum power point. These methods use the regular maximum power point tracking algorithm combined with an additional sub-procedure to calculate the position of the global maximum power point.

关键词： linear and non-linear ambient light sensors maximum power point tracking algorithm comparison of maximum power point algorithms illumination measurement temperature measurement partial shading conditions

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Binary Search and Sectional Theory-Based maximum power point tracking algorithms for Solar Photovoltaic Systems 46

Binary Search and Sectional Theory-Based Maximum Power Point...

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46th Annual Conference of the IEEE-Industrial-Electronics-Society (IECON)

作者： Kumaresan, Anusha Kandasamy, Nandha Kumar Tafti, Hossein Dehghani NIT Puducherry iTrust Pondicherry India Singapore Univ Technol & Design Singapore Singapore Univ New South Wales Sch Elect & Telecommun Sydney NSW Australia

ISBN: (纸本)9781728154145

This paper proposes sectional theory and binary search-based maximum power point tracking (MPPT) algorithms for solar photovoltaic (PV) systems. The maximum power of the solar PV under various environmental conditions are obtained by employing these algorithms. The corresponding voltage of the maximum power is computed in every step with the proposed logic, which moves the operation point closer to the maximum power point. The proposed methods are validated using the MATLAB/SIMULINK software tool. The results are bench-marked against the conventional adaptive step-based perturb and observe method. The proposed algorithms improve the performance in terms of convergence rate and reduced steady state oscillations. The results demonstrate that the sectional theorem-based algorithms are either less accurate or has slower convergence rate while the binary search-based MPPT technique is the most efficient among the algorithms tested.

关键词： Binary search method bisection algorithm maximum power point tracking algorithm photovoltaic array trisection method

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Optimizing Photovoltaic Systems: A Decision Matrix Approach for Selecting the Optimal maximum power point tracking Technique

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INTERNATIONAL JOURNAL OF ENGINEERING RESEARCH IN AFRICA 2024年 68卷 129-150页

作者： Kamela, Gosego Matsebe, Oduetse Tjiparuro, Zeundjua Botswana Int Univ Sci & Technol Dept Mech Energy & Ind Engn Palapye Botswana

Numerous strategies exist for improving maximum power point tracking (MPPT) techniques, which vary in terms of tracking speed, accuracy, sensor usage, complexity, and cost. Due to the importance of sustainable energy use and related challenges, it is essential to choose an appropriate algorithm that can reliably provide energy without exhausting resources. While much research has examined the benefits and drawbacks of different MPPT algorithms, guidance on selecting the best suited algorithm for a particular solar system application is lacking. For a fair and thorough comparison, this study analyzes four MPPT algorithms, including two artificial intelligencebased techniques, an adaptive neuro-fuzzy inference system, and a conventional technique. A decision matrix model and requirement analysis are used to determine their suitability for a standalone PV application, using particularly ranked evaluation criteria, which include tracking efficiency, implementation costs, rise time, settling time, tracking error and variance. Simulation results show that the perturb and observe technique has the fastest settling and rise times and high tracking efficiency for varying irradiance and temperature levels, with little implementation effort required for a stand-alone photovoltaic application.

关键词： maximum power point tracking algorithm Photovoltaic module Photovoltaic applications Selection criteria Requirement analysis

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A maximum power point tracking Technique for a Wind power System Based on the Trapezoidal Rule

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ENERGIES 2023年第6期16卷 2799页

作者： Pande, Jayshree Nasikkar, Paresh Symbiosis Int Deemed Univ Symbiosis Inst Technol Pune 412115 Maharashtra India

This work presents a new trapezoidal-rule-based variation of the perturb and observe algorithm to track the point with maximum power for a wind energy conversion system. The algorithm works in three steps. In the first step, the trapezoidal-rule-based division of the power curve into trapezoids of equal width is carried out. In the second step, areas of the adjacent trapezoids are compared to identify the trapezoid with the largest area. In the third step, the conventional perturb and observe algorithm is employed in the trapezoid having the largest area to capture the point of maximum power. The algorithm is simulated in MATLAB/SIMULINK to check the efficacy in capturing the maximum power. The simulation results suggest that the proposed method performs well under fluctuating wind conditions with improved yielded power. An effort to achieve simplicity for implementation and effectively track the maximum power point is made and presented.

关键词： maximum power point tracking algorithm power trapezoidal rule wind turbine wind energy conversion system

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A low cost maximum power point tracker with the hybrid algorithm that uses temperature measurement 8

A low cost maximum power point tracker with the hybrid algor...

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International Conference on Renewable Energy Research and Applications

作者： Mroczka, Janusz Ostrowski, Mariusz Wroclaw Univ Sci & Technol Chair Elect & Photon Metrol Boleslawa Prusa 53-55 PL-50317 Wroclaw Poland

ISBN: (纸本)9781728135878

In this paper a low cost maximum power point tracker is tested in a simulations and in the testing environment. The device consists of a regular integrated dc-dc converter, MSP430 microcontroller with a special maximum power point tracking algorithm built in. The algorithm uses temperature measurement to increase the tracking speed and allows to track the global maximum power point in partial shading conditions. Additionally, the implemented method is adaptative that allows to use any solar panel and provide correct tracking property with the change of the solar parameters.

关键词： maximum power point tracker maximum power point tracking algorithm temperature measurement adaptative maximum power point algorithm

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