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Voltage Regulation of Photovoltaic System with varying Loads

Voltage Regulation of Photovoltaic System with varying Loads

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IEEEE Southeast Conference (SoutheastCon)

作者： Debnath, Anjan Parvez, Imtiaz Dastgir, Md Golam Nabi, Asim Olowu, Temitayo. O. Riggs, Hugo Sarwat, Arif Florida Int Univ Dept Elect & Comp Engn Miami FL 33199 USA

ISBN: (纸本)9781665403795

The photovoltaic system is generally intermittent in nature because of instability in weather such as irradiance and temperature. Therefore it is critical to stabilize the output voltage when a PV module supplies power to wide range of loads. In order to address this issue, boost converter under variable irradiance has been used to extract maximum power from photovoltaic panels applying the conventional perturb and observe maximum power point tracking (MPPT) algorithm in this paper. The unregulated boost converter output considered as input to a buck converter which is controlled by a Proportional Integral controller in order to stabilize the output voltage for different resistive loads. It has been shown that the controller has been successfully capable of regulating the output voltage for wide variation of loads and varying irradiance. The integrated system is built and analyzed in MATLAB/Simulink environment.

关键词： Photovoltaic MPPT perturb and observe algorithm Buck Boost PI controller

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Considerations on Problem-Based Learning in the Laboratory Teaching of Microcontrollers Basics 11

Considerations on Problem-Based Learning in the Laboratory T...

引用

11th International Symposium on Electronics and Telecommunications (ISETC)

作者： Trip, Nistor Daniel Univ Oradea Dept Elect & Telecommun Oradea Romania

ISBN: (纸本)9781479972678

This paper presents aspects concerning a possible unfolding manner of laboratory hours at a microcontrollers course for students who attend applied electronics or other related specializations in engineering education. The purpose of the paper is to present a practical, problem-based way of unfolding the laboratory hours. The objectives were: orientation of lab didactic activity towards solving problems from society or the economic environment, sending to students a wide range of information useful in their future careers as engineers, increase of students' satisfaction degree regarding the educational offer and the way it is taught, finding the students who have definite design and research skills so as they should be attracted later into the scientific research projects of the department or the faculty they attend and, last but not least, to motivate and improve the technical skills of the students. In the present work, the teaching method is described in case it is chosen as design theme the construction of an electronic circuit based on a microcontroller which provides optimized conversion of solar energy captured by the photovoltaic panels. In the paper it is presented the new theme of laboratory hours and the final solution which should be reached by the students.

关键词： engineering education problem-based learning perturb and observe algorithm microcontrollers laboratory

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Enhancement of A Photovoltaic Inverter Efficiency Using A Shade-Tolerant MPPT 47

Enhancement of A Photovoltaic Inverter Efficiency Using A Sh...

引用

47th Annual Conference of the IEEE-Industrial-Electronics-Society (IECON)

作者： Hosseini, Seyedkazem Taheri, Shamsodin Pouresmaeil, Edris Espinoza-Trejo, Diego R. Univ Quebec Outaouais Dept Comp Sci & Engn Gatineau PQ Canada Aalto Univ Dept Elect Engn & Automat Espoo Finland Univ Autonoma San Luis Potosi Matehuala Mexico

ISBN: (纸本)9781665435543

The objective of this paper is to implement experimentally a maximum power point tracking (MPPT) technique on the Solantro DC-PODX Platform under different operating conditions. The MPPT technique operates in two modes. The perturb and observation (P&O) MPPT algorithm functions in a local MPPT mode when PV cells receive uniform irradiance. When the PV array is likely to be partially shaded, a global MPPT (GMPPT) subroutine is called to optimize the PV system operation through finding the absolute peak. The method holds two main features, i.e., i) detecting the occurrence of partial shading on a PV panel using the measurement of the sub-strings voltage and ii) fast and reliable tracking of the true maximum power point. The experimental results confirm that the performance of the PV inverter is considerably enhanced as the partial shading condition (PSC) can be properly detected. In addition, the true peak of the PV array under different PSCs can be reliably tracked, yielding a more efficient PV energy harvest.

关键词： photovoltaic systems shade-tolerant maximum power point tracking perturb and observe algorithm partial shading conditions

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Modelling a Solar Module and Tracing Maximum Power Point Under Variant Ambient Conditions 4

Modelling a Solar Module and Tracing Maximum Power Point Und...

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4th IEEE International Conference on Green Energy and Applications (ICGEA)

作者： Shukla, Anup Kour, Jasdeep Indian Inst Technol IIT Jammu Dept Elect Engn Jammu India Tech Educ Dept Dept Instrumentat & Control Jammu India

ISBN: (纸本)9781728160214

This paper proposes the mathematical modelling of a photovoltaic module and works out on techniques for tracking and identifying the Maximum Power Point (MPP) related to a voltage value. The MPP is worked out by using a perturb and observe algorithm and then by Ant Colony Optimization technique. The simulation is done on MATLAB platform. The simulation outcomes prove better modelling results with lesser error to the values specified on the datasheet and to the results already reported in literature. Ant Colony Optimization algorithm discussed in the paper is quite consistent with the metaheuristic techniques and lesser modification is done to the algorithm to suit the current situation as already reported. This algorithm provides faster convergence and a steady output even under adverse situations like change in ambient temperature, change in solar insolation levels and even under partial shading conditions caused due to passing clouds or falling tree branches.

关键词： ant colony optimization (ACO) perturb and observe algorithm photovoltaic(PV) module maximum power point (MPP)

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A Global MPPT algorithm for PV System under Rapidly Fluctuating Irradiance

A Global MPPT Algorithm for PV System under Rapidly Fluctuat...

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29th Annual IEEE Applied Power Electronics Conference and Exposition (APEC)

作者： Yeung, Ryan Shun-cheung Chung, Henry Shu-hung Chuang, Steve Tzu-hsiung City Univ Hong Kong Ctr Smart Energy Convers & Utilizat Res Tat Chee Ave Kowloon Tong Hong Kong Peoples R China Provista Technol Ltd Kwun Tong Peoples R China

ISBN: (纸本)9781479923250

A two-step global maximum power point (GMPP) tracking algorithm for photovoltaic (PV) system powered by a string of series-connected solar panels will be presented. In the first step, the power-voltage characteristics of the string is extracted by changing the input impedance of the inverter through three phases, so as to determine the number of panels in operation at the approximated GMPP. In the second step, the exact location of the GMPP is determined by formulating two second-order power functions, namely actual string power function and fictitious power function, and finding the intersection point of the two functions. The proposed algorithm has been evaluated on a 3kW grid-tie PV system with a PV simulator connected. The two different power-voltage characteristics are programmed and switched in order to test and compare the tracking performances of traditional perturband- observe (P&O) and proposed MPPT algorithms. Results show that the proposed algorithm takes 2.5 seconds for the step-1 process and 1 second for the step-two process to locate the GMPP. Without the first step, the speed of the second step is three times faster than the P& O algorithm.

关键词： maximum power point trackers photovoltaic power systems PV system global MPPT algorithm input impedance perturb and observe algorithm photovoltaic system power 3 kW rapidly fluctuating irradiance series connected solar panels two step global maximum power point tracking algorithm Approximation algorithms Inverters Photovoltaic cells Resistance Schottky diodes Temperature

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Electrical network of the automotive multi-sectional thermoelectric generator with MPPT based device usage 15

Electrical network of the automotive multi-sectional thermoe...

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15th European Conference on Thermoelectrics (ECT)

作者： Shiriaev, Pavel Shishov, Konstantin Osipkov, Alexey Bauman Moscow State Tech Univ 2 Ya Baumanskaya 5-1 Moscow 105005 Russia

In this paper, we design a DC/DC converter with maximum power point tracking (MPPT) function for harvesting maximum output energy from the automotive exhaust thermoelectric generator (AETEG) regardless of the engine operating conditions and values of the connected electrical load. Our developed AETEG has a multi-section structure. Due to non-uniform temperature distribution over the surface of the AETEG each section has its own temperature difference. Application of MPPT devices for such types of thermoelectric generators is accompanied by certain difficulties. Different thermal conditions of each section may cause effectivity losses of MPPT device application. Experiments are conducted with a real car engine and AETEG in order to identify the most suitable connection type between AETEG sections and MPPT device. (C) 2019 Elsevier Ltd. All rights reserved.

关键词： automotive exhaust thermoelectric generator multi-sectional thermoelectric generator maximum power point tracking perturb and observe algorithm

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Design and implementation of an indoor test bench for validation of solar MPPT algorithms 12

Design and implementation of an indoor test bench for valida...

引用

12 IEEE Int C Elect Energy Env Communications Computer Control

作者： Khadse, Mayuresh Jadhav, Vinaya Daware, Kaustubh Sharma, Shobhit Rajwade, Mukta Patil, Prachi Coll Engn Dept Elect Engn Pune Maharashtra India

ISBN: (纸本)9781467365406

As a solution to the problem of increasing deficit of electrical energy, the use of renewable energy sources is increasing. Application of renewable energy resources in electricity generation system is done in a variety of configurations such as standalone photovoltaic plants, standalone wind power plants, Microgrid system, etc. The system described and developed in this paper, aims to realize a low cost, reliable and robust test bench for testing various maximum power point tracking algorithms. This paper introduces photovoltaic simulator implemented using simple controllable DC power supply and PC, with the capability of simulating wide range of irradiance and temperature conditions. The system consists of PWM controlled boost chopper, microcontroller with inbuilt real time control capability and respective sensors for implementation of various algorithms. The proposed system is a part of COEP-Microgrid, a project initiated by the students of College of Engineering, Pune, which aims at establishing a Microgrid in the college campus. perturb & observe algorithm has been implemented on this test bench to check and verify the ability of the system.

关键词： Solar Panel Simulator DC-DC converter Maximum power point tracking perturb and observe algorithm

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PV Array Characteristics Analysis Under Partial Shading & Modeling of P&O MPPT Applied Boost Convertor Using Matlab/Simulink

PV Array Characteristics Analysis Under Partial Shading & Mo...

引用

International Conference on Energy Efficient Technologies for Sustainability (ICEETS)

作者： Joseph, Alex Kamala, J. Anna Univ Coll Engn Guindy ECE Dept Chennai 600025 Tamil Nadu India

ISBN: (纸本)9781467361507;9781467361491

This paper deals with analysis of a photovoltaic panel array characteristics by considering partial shading effects and modeling of perturb and observe MPPT (Maximum Power Point Tracking) algorithm applied boost convertor using Matlab/Simulink. Performance of a photovoltaic (PV) array is affected by temperature, solar insolation, shading and array configuration. Analysis of photovoltaic array characteristics plays an important role in developing an algorithm based devices for Maximum power point tracking (MPPT). Such devices play an important role in efficient usage of available solar energy. The analyzer developed in command window reads panel temperature, irradiance and number of cells exposed to light and generates corresponding PV characteristics. Maximum power point tracking algorithm is used to generate pulse width modulated signal for boost convertor thus extracting the maximum power from the solar PV module and transferring that power to the load. perturb and observes algorithm is used, which is the simplest algorithm for implementation.

关键词： Matlab based analyzer partial shading effects Maximmum power point tracking(MPPT) perturb and observe algorithm

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Maximum Power Point Tracking of Direct-Drive PMSG with High-Efficiency Boost Converter 1st

Maximum Power Point Tracking of Direct-Drive PMSG with High-...

引用

International Conference on Emerging Trends and Advances in Electrical Engineering and Renewable Energy (ETAEERE)

作者： Banu, J. Barsana Moses, M. Balasingh Ganapathy, S. Anna Univ Elect & Elect Engn Tiruchirappalli India

ISBN: (纸本)9789811042867;9789811042850

This chapter describes the variable speed stand-alone wind power supply system that incorporates permanent magnet synchronous generator, three-phase diode rectifier, and improved dc-dc boost converter with resistive load. Improved dc-dc boost converter controls to concentrate the most extreme power from the accessible wind. In the wind generation system, the power converter efficiency is one of the important considerations realizing the system performance. In those systems, dc-dc step-up converter is broadly utilized for high-conversion system. Considering the converter's expense and efficiency, this chapter mostly concentrates on the outline of an enhanced topology of the boost converter received for high-power stand-alone wind power system. It describes the perturbation and observation maximum power point tracking algorithm. The MPPT algorithm in addition to the dc-dc step-up converter is simulated by MATLAB/Simulink software. The outcomes demonstrate that the dc-dc converter topology can understand the most extreme power point tracking control of the wind turbine.

关键词： DC-DC boost converter Efficiency MPPT perturb and observe algorithm WECS

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Implementation of an Efficient MPPT algorithm for Photovoltaic System 2

Implementation of an Efficient MPPT Algorithm for Photovolta...

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2nd International Conference on Computing, Mathematics and Engineering Technologies (iCoMET)

作者： Khan, Sehrish Qazi, Rasheed Ahmed Sukkur IBA Univ Engn Dept Sukkur Pakistan

ISBN: (纸本)9781538695098

the purpose of this research paper is to discuss an efficient algorithm for tracking maximum power point. Maximum power point tracking (MPPT) technique has been used since decades to improve the efficiency of Photovoltaic systems. perturb and observe algorithm is a simple and conventional MPPT algorithm which works by moving towards achieving maximum power point by keeping track of voltages. It calculates the required degree of perturbation based on the step-size and the value of voltage at a given time. Maximum power point techniques yield better results under uniform insolation and other environmental conditions like temperature, but fail to extract maximum power under partial shading conditions. The algorithm is implemented by simulation by using MATLAB/Simulink and the results are discussed. The algorithm is implemented on hardware components, 50V photovoltaic array, DC-DC Buck converter, current sensor and LCD for displaying the results. Finally, a comparison between the results obtained through simulation and hardware components is presented and future prospects are discussed to improve the efficiency of the implemented algorithm.

关键词： Maximum Power Point (MPPT) Photovoltaic perturb and observe algorithm Buck Converter current sensor

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