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mppt algorithm for thermoelectric generators based on parabolic extrapolation

IET GENERATION TRANSMISSION & DISTRIBUTION 2019年第6期13卷 821-828页

作者： Bijukumar, Bepinkumar Raam, Arunadevi Ganesan Kaushik Ganesan, Saravana Ilango Nagamani, Chilakapati Reddy, Maddikara Jaya Bharata Natl Inst Technol Dept Elect & Elect Engn Tiruchirappalli Tamil Nadu India

In this study, a maximum power point tracking (mppt) technique based on parabolic extrapolation has been presented for thermoelectric generator systems. Conventional mppt methods require a closed-loop controller and perturb and observe (P&O) method to provide fast-tracking response. However, they produce power loss due to small oscillations in the steady state. The proposed method excludes the use of closed-loop controller and steady-state oscillations by directly estimating the coordinates of MPP using three random operating points on the parabolic P-I curve. To substantiate the effectiveness of the parabolic extrapolation-based mppt algorithm, different conditions of temperature gradient and load have been applied. The results demonstrate that the proposed algorithm takes <15% of the time taken by P&O method to track the MPP.

关键词： thermoelectric conversion maximum power point trackers extrapolation closed loop systems mppt algorithm parabolic extrapolation maximum power point tracking technique thermoelectric generator systems closed-loop controller perturb and observe method P& O method fast-tracking response power loss steady-state oscillations random operating points parabolic P-I curve temperature gradient

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mppt algorithm Implementation for Solar Photovoltaic module using Microcontroller

MPPT Algorithm Implementation for Solar Photovoltaic module ...

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Annual IEEE India Conference - Engineering Sustainable Solutions

作者： Reddy, B. R. Sanjeeva Jambholkar, Praveen Narayana, P. Badari Reddy, K. Srinivasa JNTUH BVRIT Dept ECE Hyderabad Telangana India Cybermot Technol R&D Div Hyderabad Telangana India BVRIT Sri Vishnu Educ Soc Hyderabad Telangana India

ISBN: (纸本)9781457711091

Maximum Power Point Tracking (mppt) algorithm is widely used control technique that varies the electrical operating point to extract maximum power available from the solar cell of photovoltaic (PV) module. Since the solar cells have nonlinear i-v characteristics, the efficiency of PV module is very low and power output depends on solar insolation level and ambient temperature. Moreover there is a great loss of power due to mismatch of source and load. So, to extract maximum power from solar panel a mppt needs to be designed and the objective of the paper is about a novel cost effective and efficient microcontroller based mppt system for solar voltaic system to ensure fast maximum power point operation at all fast changing environmental conditions. The proposed controller scheme utilizes PWM techniques to regulate the output power of boost converter at its maximum possible value and simultaneously controls the charging process of battery. Parameter extraction, model evaluation and analysis of boost converter is demonstrated using MATLAB/Simulink model.

关键词： mppt algorithm Photovoltaic Module Microcontroller PWM Techniques Boost Converter

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mppt algorithm for Current Balancing of Partially Shaded Photovoltaic Modules

MPPT Algorithm for Current Balancing of Partially Shaded Pho...

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IEEE International Symposium on Industrial Electronics (ISIE)

作者： Bellini, Armando Bifaretti, Stefano Iacovone, Vincenzo Univ Roma Tor Vergata Dept Elect Engn Rome Italy

ISBN: (纸本)9781424463916

Among Renewable Energy Sources (RES), Photovoltaic (PV) sources represent an attractive solution because the solar energy is accessible everywhere;moreover, the price per watt of PV modules is going on decreasing. The output voltage furnished by a PV module is quite low;therefore, a series connection of different modules have to be employed in order to obtain a sufficient output dc voltage. In non-uniform irradiation conditions of a PV array, the traditional Maximum Power Point Tracking (mppt) algorithms can converge to a relative maximum point;besides, the total power produced by the array can be lower than the sum of the maximum powers that could been produced by each module. To increase the power produced by partially shaded PV, is necessary to employ a power converter structure able to impose to each module of the PV array a different current value. The paper proposes a non-conventional mppt algorithm able to maximize the photovoltaic energy supplied by partially shaded PV modules. To validate the algorithm, a comparison with a conventional architecture has been performed pointing out that the proposed configuration produces more power when the solar irradiation of the shaded module is greater than 20-30% of the other modules irradiation.

关键词： mppt algorithm PV array current balancing maximum power point trackers maximum power point tracking partially shaded photovoltaic modules photovoltaic energy photovoltaic power systems photovoltaic sources power converter structure renewable energy sources renewable energy sources solar irradiation

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Designing a novel mppt algorithm based on the extraterrestrial irradiance for photovoltaic energy generation systems and testing under partial shade conditions

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JOURNAL OF COMPUTATIONAL ELECTRONICS 2022年第4期21卷 841-851页

作者： Cinar, Said Mahmut Bakim, Sedat Hocaoglu, Fatih Onur Afyon Kocatepe Univ Elect Engn Dept ANS Campus TR-03200 Afyon Turkey Afyon Kocatepe Univ Solar & Wind Res & Applicat Ctr ANS Campus TR-03200 Afyon Turkey

Photovoltaic (PV) panels are widely used in the generation of electricity from solar radiation. To improve the efficiency of PV energy generation systems, the PV panels should operate at around the maximum power point (MPP), which can be provided by maximum power point tracking (mppt) algorithms. In the present study, we designed a novel mppt algorithm that has less complexity and low computation load than existing traditional mppt algorithms and that starts to track near the MPP. The proposed algorithm takes extraterrestrial irradiances into account when defining operation points close to MPP. The MPP parameters were computed using datasheet information of the PV panel to achieve a low computation load. The proposed algorithm was tested for efficiency and performance under different scenarios, including partial shade conditions, against the Perturb & Observe (P&O) algorithm. The test results showed that the proposed algorithm outperformed the P&O algorithm.

关键词： mppt algorithm Extraterrestrial irradiance PV panel Solar energy

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Intelligent charging control method of shared vehicle based on mppt algorithm in the environment of internet of things

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JOURNAL OF AMBIENT INTELLIGENCE AND HUMANIZED COMPUTING 2021年 1-9页

作者： Ma, Ling Lu, Ye'an Anhui Tech Coll Mech & Elect Engn Coll Automobile & Rail Wuhu Peoples R China Anhui Tech Coll Mech & Elect Engn Coll Elect Engn Wuhu Peoples R China

With the gradual popularization of shared vehicles, the large-scale access of electric vehicle charging pile will have a significant impact on the operation planning of power grid. Therefore, a vehicle charging control strategy based on the Internet of things is proposed. Combined with the basic principle of mppt algorithm and fully considering the actual needs, the peak load of the charging pile is adjusted from the load limit, and the voltage energy consumption of the charging circuit is accurately controlled to realize the intelligent charging of the shared vehicle. The test results show that, compared with other methods, the peak load of the line in this paper is smaller and the load curve is smoother, which is conducive to the safe and stable operation of the power grid;it can effectively reduce the loss rate, which is conducive to the economic operation of the power grid, improve the voltage quality, and ensure the power demand of users.

关键词： Internet of things Intelligent charging control mppt algorithm

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Efficient and Fast Wind Turbine mppt algorithm Using TS Fuzzy Logic and Optimal Relation Methods

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IEEE LATIN AMERICA TRANSACTIONS 2024年第7期22卷 612-619页

作者： Lopez-Flores, David R. Acosta-Cano-de-los-Rios, Pedro R. Marquez-Gutierrez, Pedro R. Acosta-Cano-de-los-Rios, Jose E. Baray-Arana, Rogelio E. Ramirez-Alonso, Graciela Tecnol Nacl Mexico IT Chihuahua Ave Tecnol 2909 Chihuahua 31310 Mexico Univ Autonoma Chihuahua Fac Ingn Circuito Numero 1 S-N Chihuahua Mexico

This paper proposes an efficient and fast maximum power point tracking (mppt) algorithm for a wind turbine (WT) connected to a battery bank via a permanent magnet synchronous generator, a three-phase diode rectifier, and a dc-dc boost converter. The algorithm is based on the Takagi-Sugeno (TS) fuzzy system and optimal relation methods and is called TS-mppt. The fuzzy system computes the converter duty cycle using an input that combines the error and its rate of change. The error is the difference between the reference current computed from the optimal relation and the rectifier current. The methods used in the algorithm resulted in a five-rule TS fuzzy system, which contributed to a fast algorithm in terms of its total execution time (TET): 89.12 s on the F28069M board. The TET attained enabled a synchronized operation of the algorithm with the converter switching frequency. Additionally, the results based on the processor-in-the-loop simulation approach show that the TS-mppt algorithm achieves an effective MPP tracking process with an energy conversion efficiency of 99.43% and behaves properly when evaluated over the typical WT power curve. Furthermore, the effectiveness and performance of the proposed algorithm are demonstrated against others using the proportional-integral controller, the Mamdani fuzzy method, and a TS fuzzy model from the literature.

关键词： Fuzzy systems Maximum power point trackers Rectifiers Wind turbines Inference algorithms Design methodology Batteries Wind turbine system mppt algorithm fuzzy logic TakagiSugeno optimal relation F28069M board PIL simulation

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Analysis for step-size optimisation on mppt algorithm for photovoltaic systems

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IET POWER ELECTRONICS 2017年第13期10卷 1647-1654页

作者： Tang, Lei Xu, Wei Mu, Chaoxu Xi An Jiao Tong Univ Sch Elect Engn Xian 710049 Shaanxi Peoples R China Huazhong Univ Sci & Technol Sch Elect & Elect Engn State Key Lab Adv Electromagnet Engn & Technol Wuhan 430074 Hubei Peoples R China Tianjin Univ Sch Elect & Informat Engn Tianjin 300072 Peoples R China

As the output characteristic of photovoltaic arrays is a non-linear function of external environment, the step-size of maximum power point tracking (mppt) algorithm should be regulated dynamically to improve the mppt efficiency. However, the step-size, essentially determining the performance of mppt algorithm, is often designed for a particular system with certain working conditions. To solve this problem, an optimisation algorithm is proposed in this study, which can adjust the step-size automatically. From the essence of optimisation problem, the tracking process can be converted into a maximum sequence which can be solved by several iteration algorithms. This study provides a simple and effective way to obtain the step-size. Once the iteration method is selected, the performance of the mppt algorithm has been decided. The analysis of convergence, convergence order and stability are presented in this study. Comprehensive simulation and experimental results demonstrate that this proposed algorithm has a good stable and dynamic characteristic.

关键词： photovoltaic power systems maximum power point trackers optimisation iterative methods convergence photovoltaic systems convergence order iteration algorithms step-size optimisation mppt algorithm maximum power point tracking algorithm photovoltaic arrays

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A High Voltage Self-Biased Integrated DC-DC Buck Converter With Fully Analog mppt algorithm for Electrostatic Energy Harvesters

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IEEE JOURNAL OF SOLID-STATE CIRCUITS 2013年第12期48卷 3002-3010页

作者： Stanzione, Stefano van Liempd, Chris van Schaijk, Rob Naito, Yasuyuki Yazicioglu, Firat Van Hoof, Chris IMEC Holst Ctr Eindhoven Netherlands Katholieke Univ Leuven Louvain Belgium Panasonic Corp Osaka Japan IMEC Louvain Belgium

This paper presents a high voltage and low power inductive DC-DC buck converter for interfacing electrostatic energy harvesters. The system, implemented in TSMC 0.25 mu m BCD, can convert input voltages from 5 to 60 V to recharge the energy storage system connected to the output. The system includes also a Maximum Power Point Tracking algorithm for matching the equivalent source resistance of harvester and AC-DC converter. Due to power consumption constrains, a conventional implementation of this algorithm, based on ADC, DAC and complex digital processing is replaced by a much simpler fully analog design. Measurements have shown a peak end-to-end efficiency of 88% with 99.8% mppt peak efficiency.

关键词： DC-DC converter high voltage mppt algorithm ultra-low power

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Trusted Simulation Using Proteus Model for a PV System: Test Case of an Improved HC mppt algorithm

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ENERGIES 2020年第8期13卷

作者： Chalh, Abdelilah El Hammoumi, Aboubakr Motahhir, Saad El Ghzizal, Abdelaziz Subramaniam, Umashankar Derouich, Aziz SMBA Univ EST Innovat Technol Lab Fes 30000 Morocco SMBA Univ ENSA Engn Syst & Applicat Lab Fes 30000 Morocco Prince Sultan Univ Coll Engn Renewable Energy Lab Riyadh 12435 Saudi Arabia

The real implementation of the maximum power point tracking (mppt) controllers for the photovoltaic (PV) systems is still a big challenge for researchers working in this field. Often, they use simulation tools to assess the performance of their mppt algorithms before actual implementation. In this context, this paper aims to propose a trusted simulation of a PV system designed under Proteus software. The proposed PV simulator can be used to verify and evaluate the performance of mppt algorithms with a closer approximation to the real implementation. The main advantage of this model that it contains a real microcontroller, as can be found in reality, so that same code for the mppt algorithm used in the simulation will be used in real implementation. In contrast, when using (Powersim Software) PSIM or Matlab/Simulink, the code of the algorithm must be rewritten once the real experiment begins, because these tools don't provide a microcontroller or an electronic board in which our algorithm can be implemented and tested in the same way as the real experiment. After this section, a modified Hill-Climbing (HC) algorithm is introduced. The proposed algorithm can avoid the drift problem posed by conventional HC under a fast variation in insolation. The simulation results show that this method presents good performance in terms of efficiency (99.21%) and response time (10 ms), which improved by 1.2% and 70 ms respectively compared to the conventional HC algorithm.

关键词： Proteus mppt algorithm PV Simulator Drift problem

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Modified hill climbing mppt algorithm with reduced steady-state oscillation and improved tracking efficiency

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JOURNAL OF ENGINEERING-JOE 2018年第17期2018卷 1878-1883页

作者： Zhu, Weiwei Shang, Liqun Li, Pengwei Guo, Hangchen Xian Univ Sci & Technol Coll Elect & Control Engn Xian 710054 Shaanxi Peoples R China

To ensure the photovoltaic (PV) system can still output maximum power under changing environmental conditions, a modified hill climbing algorithm is proposed. The algorithm uses a variable step-size strategy to reduce the steady-state oscillations and prevent operating point from diverging away from the maximum power point by introducing boundary conditions. To verify its effectiveness, the proposed algorithm is compared with the conventional and adaptive hill climbing method under the environmental condition of irradiance step change and gradual change. The simulation results show that the proposed algorithm can increase the dynamic response speed of the PV system by 75% under varying irradiance, and can achieve a steady-state tracking accuracy of 99.8%. Besides, the proposed algorithm only needs to embed several lines of additional programs in the conventional hill climbing maximum power point tracking (mppt) control program and does not require additional hardware components, which reduces the cost of PV power generation.

关键词： maximum power point trackers power generation control photovoltaic power systems steady-state oscillations boundary conditions adaptive hill climbing method irradiance step change dynamic response speed PV system steady-state tracking accuracy maximum power point tracking control program PV power generation mppt algorithm photovoltaic system

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