Дисертації з теми "Limited power point tracking"
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Liu, Hongliang. "Contribution for integrating urban wind turbine into electrical microgrid : modeling and control." Thesis, Compiègne, 2017. http://www.theses.fr/2017COMP2331/document.
Повний текст джерелаThe integration of the wind power, which is one mostly used renewable resource, is always one challenger for urban microgrid. In this thesis, one urban wind turbine based on a permanent magnet synchronous machine (PMSM) is studied in order to be integrated into a DC urban microgrid. A state of the art concerning the renewable energies, DC microgrid, and control strategies of wind power generation is done. Based on a model of urban wind turbine fitting the demand of urban electric system, which consists of an emulator of wind speed and blades, a PMSM and a DC/DC converter, this thesis proposes the maximum power point tracking (MPPT) methods satisfying the requirement of producing energy as much as possible, and power limited control (PLC) strategies answering the demand of flexible energy production. From simple to complex, four MPPT algorithms including Perturbation and Observation (P&O) fixed step-size method, P&O with improved Newton-Raphson method, P&O with fuzzy logic method and lookup table method are studied and implemented to be compared with each other using three wind velocity profiles. According to the experience about MPPT subject, four PLC algorithms are introduced and implemented to be analyzed and compared with each other with one power demand profile calculated randomly. Summarizing all experimental results, the lookup table method can handle all requirement of MPPT operating mode supplying the best performance, however, in the condition of more flexible power demand operating mode, the combination of P&O and fuzzy logic method presents the best performance and potential which can be achieved in future works
Aourir, Mazian Jamila. "Modeling and control of an urban wind turbine intended to be integrated into an electrical microgrid." Electronic Thesis or Diss., Compiègne, 2022. http://www.theses.fr/2022COMP2669.
Повний текст джерелаThe high global consumption of fossil energy fuels is accelerating their depletion and threatening the Earth's environmental balance. For that, new categories of energy based on renewable sources are developed to build a new diversified and decarbonized energy mix. In order to allow a massive penetration of these renewable energy sources (RESs) into the conventional grid, the use of new electrical system structures seems to be a promising solution, taking into account several aspects such as the costs, the security of supply, and the ease of implementation. Thus, microgrids (MGs) constituted by decentralized energy sources and energy storage systems have been developed to replace or complement the main centralized grid. They can ensure some support functions, i.e., enhancement of the grid stability, black-start operation, replacement of diesel generators, etc. In addition, the consumers become producers and are able to inject a part of their surplus of energy into the public grid. In urban areas, the solar photovoltaic (PV) system has been extensively examined for decades and is widely used thanks to its many advantages such as low environmental impact, easy integration in buildings, reduction of transportation losses, etc. Recently, small-scale wind turbines (SSWTs) are also becoming more and more used, as a complementary source for PV systems, especially for applications near ground level and in urban areas where wind speed is a few meters per second. However, the use of wind power is still nowadays a challenge for the urban MG. In this present thesis, two different types of studies are conducted for a SSWT. i) the first one concerns new power control strategies for a SSWT. It deals with limited power point tracking (LPPT) as an emerging new technology for power management controllers for SSWTs. The LPPT operates in such a way that power requested by the user can be extracted from the wind turbine (WT) while respecting constraints and limitations. However, operating in LPPT mode still requires a deep understanding to obtain a compromise between minimizing power oscillations and transient response. For that, three LPPT power control strategies for a SSWT based on the perturb and observe (P&O) principle are investigated. The proposed algorithms are P&O with fixed step size, P&O based on Newton’s method, and P&O based on the fuzzy logic (FL) technique. The experimental results highlight that all methods function correctly and reach the limited power point (LPP). The FL method shows good dynamic performances with more steady oscillations around LPP compared to other methods. ii) in the second study in this thesis, the integration of a SSWT into a direct current (DC) MG was investigated. The RESs (PV sources and WT), storage, and public grid are included and a supervisory system is suggested to manage the power. The power balance is ensured thanks to the real-time power management in the operational layer of the supervisory system. The power is managed based on the rules made according to several aspects, such as every component's energy cost or tariff and its physical limitations. Excess of power produced by PV sources and WT is one of the problems that face the reliability of the MG and should be resolved. Thus, a strategy to limit power from each source is suggested. It is based on two coefficients called “shedding coefficients” that have the role of calculating the quantity of power that should be limited from each source. Simulation tests are carried out using two power management strategies: optimization and without optimization (storage priority). The results reveal that the coefficient reduces the overall cost and whatever the coefficient that is applied, optimization still provides good performances and significantly reduces the global cost
Duncan, Joseph 1981. "A global maximum power point tracking DC-DC converter." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/33152.
Повний текст джерелаIncludes bibliographical references (p. 79-80).
This thesis describes the design, and validation of a maximum power point tracking DC-DC converter capable of following the true global maximum power point in the presence of other local maximum. It does this without the use of costly components such as analog-to-digital converters and microprocessors. It substantially increases the efficiency of solar power conversion by allowing solar cells to operate at their ideal operating point regardless of changes in load, and illumination. The converter switches between a dithering algorithm which tracks the local maximum and a global search algorithm for ensuring that the converter is operating at the true global maximum.
by Joseph Duncan.
M.Eng.
Acharya, Parash. "Small Scale Maximum Power Point Tracking Power Converter for Developing Country Application." Thesis, University of Canterbury. Electrical and Computer Engineering, 2013. http://hdl.handle.net/10092/8608.
Повний текст джерелаAldobhani, Abdulaziz Mohamed Saeed. "Maximum power point tracking of PV system using ANFIS prediction and fuzzy logic tracking." Thesis, De Montfort University, 2008. http://hdl.handle.net/2086/4284.
Повний текст джерелаGamboa, Gustavo. "REALIZATION OF POWER FACTOR CORRECTION AND MAXIMUM POWER POINT TRACKING FOR LOW POWER WIND TURBINES." Master's thesis, University of Central Florida, 2009. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/4283.
Повний текст джерелаM.S.E.E.
School of Electrical Engineering and Computer Science
Engineering and Computer Science
Electrical Engineering MSEE
Aashoor, Fathi. "Maximum power point tracking techniques for photovoltaic water pumping system." Thesis, University of Bath, 2016. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.683537.
Повний текст джерелаSanders, Dustin R. "Maximum Power Point Tracking and Communications for Solar Powered Vehicles." Thesis, Southern Illinois University at Edwardsville, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10010780.
Повний текст джерелаThe SIUe solar car team lacks a competitive communication system. To enable the competitive edge a major upgrade to the electronics and wiring was required. A new maximum power point tracker and driver support system was developed to give them the competitive edge.
Kang, Byung O. "Maximum Power Point Tracking Using Kalman Filter for Photovoltaic System." Thesis, Virginia Tech, 2010. http://hdl.handle.net/10919/30920.
Повний текст джерелаMaster of Science
Gohar, Ali Hina. "Maximum Power Point Tracking of Photovoltaic system using Non-Linear Controllers." Doctoral thesis, Universitat Autònoma de Barcelona, 2020. http://hdl.handle.net/10803/671122.
Повний текст джерелаLa creciente demanda de energía, el agotamiento de los combustibles fósiles y el aumento del calentamiento global debido a la emisión de carbono han hecho surgir la necesidad de un sistema energético alternativo, de eficiencia general y respetuoso con el medio ambiente. La energía solar se considera una de las formas de energía más inagotables de este universo, pero tiene el problema de la baja eficiencia debido a las diferentes condiciones ambientales. El panel solar exhibe un comportamiento no lineal en condiciones climáticas reales y la potencia de salida fluctúa con la variación de la irradiancia solar y la temperatura. Las condiciones climáticas cambiantes y el comportamiento no lineal de los sistemas fotovoltaicos plantean un desafío en el seguimiento de la variación máxima de PowerPoint. Por lo tanto, para extraer y entregar continuamente la máxima potencia posible del sistema fotovoltaico, en determinadas condiciones ambientales, se debe formular la estrategia de control de seguimiento del punto de máxima potencia (MPPT) que opere continuamente el sistema fotovoltaico en su MPP. Se requiere un controlador no lineal robusto para asegurar MPPT manejando las no linealidades de un sistema y haciéndolo robusto frente a condiciones ambientales cambiantes. El control de modo deslizante (SMC) se usa ampliamente en sistemas de control no lineales y se ha implementado en sistemas fotovoltaicos (PVC) para rastrear MPP. SMC es robusto contra perturbaciones, incertidumbres del modelo y variaciones paramétricas. Representa fenómenos indeseables como el parloteo, inherentes a él, que provocan pérdidas de energía y calor. En esta tesis, en primer lugar, se formula un controlador SMC de orden entero para extraer la máxima potencia de un sistema fotovoltaico solar en condiciones climáticas variables empleando el esquema MPPT de perturbar y observar (P&O) para el sistema fotovoltaico autónomo propuesto. El sistema propuesto consta de dos esquemas de bucles, a saber, el bucle de búsqueda y el bucle de seguimiento. P&O MPPT se utiliza en el bucle de búsqueda para generar la señal de referencia y se utiliza un controlador SMC de seguimiento en el otro bucle para extraer la máxima potencia fotovoltaica. El sistema fotovoltaico está conectado con la carga a través del convertidor elevador DC-DC electrónico de potencia. Primero se deriva un modelo matemático del convertidor elevador y, en base al modelo derivado, se formula un SMC para controlar los pulsos de puerta del interruptor del convertidor elevador. La estabilidad del sistema de circuito cerrado se verifica mediante el teorema de estabilidad de Lyapunov. El esquema de control propuesto se prueba bajo diferentes niveles de irradiancia y los resultados de la simulación se comparan con el controlador clásico proporcional integral derivado (PID). El SMC clásico describe fenómenos indeseables como el parloteo, inherente a él, que causa pérdidas de energía y calor. En la siguiente parte de esta tesis, se analiza el diseño del controlador de modo deslizante adaptativo (ASMC) para el sistema fotovoltaico propuesto. El control adoptado se ejecuta utilizando un ASMC y la mejora se actualiza utilizando un algoritmo de optimización MPPT del Método de búsqueda de patrón mejorado (IPSM). Se utiliza un IPSM MPPT para generar el voltaje de referencia para controlar el controlador ASMC subyacente. Se ha realizado una comparación con otros dos algoritmos de optimización, a saber, Perturb \ Observe (P&O) y Particle Swarm Optimization (PSO) con IPSM para MPPT. Como estrategia no lineal, la estabilidad del controlador adaptativo está garantizada mediante la realización de un análisis de Lyapunov.
The increasing energy demands, depleting fossil fuels, and increasing global warming due to carbon emission has arisen the need for an alternate, overall efficiency, and environment-friendly energy system. Solar energy is considered to be one of the most inexhaustible forms of energy in this universe, but it has the problem of low efficiency due to varying environmental conditions. Solar panel exhibits nonlinear behavior under real climatic conditions and output power fluctuates with the variation in solar irradiance and temperature. Changing weather conditions and nonlinear behavior of PV systems pose a challenge in the tracking of varying maximum PowerPoint. Hence, to continuously extract and deliver the maximum possible power from the PV system, under given environmental conditions, the maximum power point tracking (MPPT) control strategy needs to be formulated that continuously operates the PV system at its MPP. A robust nonlinear controller is required to ensure MPPT by handling nonlinearities of a system and making it robust against changing environmental conditions. Sliding mode control (SMC) is extensively used in non-linear control systems and has been implemented in photovoltaic systems (PV) to track MPP. SMC is robust against disturbances, model uncertainties, and parametric variations. It depicts undesirable phenomena like chattering, inherent in it causing power and heat losses. In this thesis, first, an integer order SMC controller is formulated for extracting maximum power from a solar PV system under variable climatic conditions employing the perturb and observe (P&O) MPPT scheme for the proposed stand-alone PV system. The proposed system consists of two loops schemes, namely the searching loop and the tracking loop. P&O MPPT is utilized in the searching loop to generate the reference signal and a tracking SMC controller is utilized in the other loop to extract the maximum PV power. PV system is connected with load through the power electronic DC-DC boost converter. A mathematical model of the boost converter is derived first, and based on the derived model, an SMC is formulated to control the gate pulses of the boost converter switch. The closed-loop system stability is verified through the Lyapunov stability theorem. The proposed control scheme is tested under varying irradiance levels and the simulation results are compared with the classical proportional integral derivative (PID) controller. Classical SMC depicts undesirable phenomena like chattering, inherent in it causing power and heat losses. In the next part of this thesis, the design of the adaptive sliding mode controller (ASMC) is discussed for the proposed PV system. The adopted control is executed utilizing an ASMC and the enhancement is actualized utilizing an Improved Pattern Search Method (IPSM) MPPT optimization algorithm. An IPSM MPPT is used to generate the reference voltage in order to command the underlying ASMC controller. Comparison with two other optimization algorithms, namely, a Perturb & Observe (P&O) and Particle Swarm Optimization (PSO) with IPSM for MPPT has been conducted. As a non-linear strategy, the stability of the adaptive controller is guaranteed by conducting a Lyapunov analysis. The performance of the proposed control architectures is validated by comparing the proposals with that of the well-known and widely used PID controller. The simulation results validate that the proposed controller effectively improves the voltage tracking, system power with reduced chattering effect, and steady-state error. A tabular comparison is provided at the end of each optimization algorithm category as a resume quantitative comparison. It is anticipated that this work will serve as a reference and provides important insight into MPPT control of the PV systems.
Sokolov, Michael. "Small-signal modelling of maximum power point tracking for photovoltaic systems." Thesis, Imperial College London, 2013. http://hdl.handle.net/10044/1/39348.
Повний текст джерелаChabo, Alexander, and Peter Tysk. "Maximum Net-power Point Tracking of a waste heat recovery system." Thesis, KTH, Maskinkonstruktion (Inst.), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-202206.
Повний текст джерелаAbout 30% of the released energy of a truck’s fuel is waste heat in the exhaustsystem. It is possible to recover some of the energy with a waste heat recovery system that generates electricity from a temperature difference by utilising the Seebeck-effect. Two thermoelectric generators are implemented on a truck and utilises the exhaust gas as a heat source and the coolant fluid as a cold source to accomplish a temperature difference in the generators. The electricity is reintroduced to the truck’s electrical system and thus reducing the load on the electrical generator in the engine which results in lower fuel consumption. This thesis includes the construction of a function that maximises the netpowerderived from the system. The function developed is named Maximum Net Power Point Tracking (MNPT) and has the task of calculating reference values that the controllers of the system must achieve in order to obtain maximumnet-power. A simulation environment has been developed in Matlab/Simulink in order to design a control strategy to three valves and one pump. The system has been implemented on a engine control unit that has been mounted on a test rack. The engine control unit communicates through CAN to connected devices. The system has not been implemented on the truck due that all the physical components were not completed during the time of the thesis. A case study has been conducted and the results proves that the use of an MNPT-function allows up to 300% increase in regenerated net power into the trucks electrical system compared with no control algorithms, and up to 50% compared with static reference values.
Alqarni, Mohammed. "A high efficiency photovoltaic inverter system configuration with maximum power point tracking." Thesis, Brunel University, 2016. http://bura.brunel.ac.uk/handle/2438/12767.
Повний текст джерелаRimkus, Lukas. "Tracking maximum power point of photovoltaic modules under non-uniform solar irradiance." Master's thesis, Lithuanian Academic Libraries Network (LABT), 2014. http://vddb.library.lt/obj/LT-eLABa-0001:E.02~2014~D_20140616_131014-80024.
Повний текст джерелаŠiame magistro darbe buvo sumodeliuotas ir ištirtas fotovoltinio modulio veikimas, veikiant Lietuvoje būdingiems saulės apšvietos ir temperatūros pokyčiams. Fotovoltinį modulį sudaro 60 polikristalinių silicio celių sujungtų nuosekliai sistema. Modeliavimui ir skaičiavimas atlikti buvo naudojamas Matlab®/Simulink® programinės įrangos paketas. Įvedus vietos ilgumą, platumą ir pasirinkus metų dieną sugeneruojama saulės apšvietos kreivė paros bėgyje. Išgauti maksimalią galią iš fotovoltinio elemento buvo pasirinkta „buck-boost“ tipo įtampos keitiklis ir „Kalno-kilimo“ didžiausios galios taško algoritmas. Naudojant pasirinkto tipo įtampos keitiklį ir algoritmą galima pasiekti iki 93,95 % maksimalios galios. Darbą sudaro 7 dalys: įvadas, maksimalios galios algoritmų literatūros apžvalga, sistemos modeliavimas, maksimalios galios algoritmo sudarymas, rezultatai, išvados, literatūros sąrašas. Darbo apimtis 60 puslapiai, 2 priedai, 41 iliustracijų 16 lentelių, 37 bibliografiniai šaltiniai.
Mac, Donald Ramasy Rafaël. "Instrumentation platform and Maximum Power Point tracking control for a hydrokinetic turbine." reponame:Repositório Institucional da UnB, 2017. http://repositorio.unb.br/handle/10482/24457.
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O projeto Hydro-K tem como objetivo o desenvolvimento de uma turbina hidrocinética. O protótipo ou o modelo preliminar desta certamente apresenta incertezas e para eliminá-las são necessários testes e coleta de dados. Essa coleta foi feita através de uma plataforma instrumental desenvolvida neste trabalho. Um outro desafio foi o controle da turbina. O controle tradicional das turbinas hidrocinéticas com um eixo horizontal, velocidade variável e um angulo da pá fixo, requer o mapeamento da curva CP da turbina com antecedência. Em seguida, a sua velocidade de rotação é medida e manipulada de modo a manter a máxima eficiência do rotor. Recentemente, o controle do Maximum Power Point Tracking (MPPT) foi aplicado às turbinas eólicas. Esse método de controle elimina a necessidade de mapeamento de curva CP medindo a tensão e a saída de corrente do gerador e ajustando periodicamente a carga elétrica no gerador para manter a potência máxima de saída elétrica. Considerando as semelhanças entre as turbinas hidrocinéticas e as eólicas, é provável que o MPPT possa ser aplicado para os hidrogeradores. Um segundo objetivo desta dissertação é avaliar a eficácia do MPPT para turbinas hidrocinéticas comparando uma estratégia de controle convencional com o MPPT usando simulações no "SIMULINK". A carga elétrica no gerador é variada usando o Pulse Width Modulation (PWM). A turbina hidrocinética do Hydro-K desenvolvida na Universidade de Brasília (UnB) é equipada com um gerador síncrono-trifásico com ímã permanente. Os resultados das simulações e experiências são apresentados comparando os dois métodos de controle acima mencionados sob diferentes condições de velocidade da água, e mostram que o controle MPPT fornece uma saída elétrica superior.
A project named Hydro-K is aimed at developing a hydrokinetic turbine. The prototype or preliminary model of this turbine will inherently present uncertainties. Eliminating them requires testing and data gathering. The data is acquired using an instrumentation platform designed in this dissertation. Another challenge will be controlling the turbine. Controlling traditional horizontal-axis-variable-speed-fixed-pitch hydrokinetic turbines requires mapping its efficiency at various water and rotor speeds, i.e., the CP curve of the turbine, in advance. Whereafter, its rotational velocity is measured and manipulated in order to maintain maximum efficiency of the rotor. Recently, Maximum Power Point Tracking (MPPT) control has been applied to wind turbines. This control method eliminates the necessity of CP curve mapping by measuring the generator’s voltage and current output, and periodically adjusting the electrical load on the generator to maintain the maximum electrical power output. Considering the similarities between hydrokinetic and wind turbines, it is likely that MPPT can be effectively applied for the hydrokinetic variant. Therefore, a second objective is assessing the effectiveness of MPPT for hydrokinetic turbines by comparing a conventional control strategy with MPPT using simulations in "SIMULINK". The electrical load on the generator is varied by using Pulse Width Modulation (PWM). The Hydro-K turbine developed at the University of Brasilia (UnB) is equipped with a three-phase-permanent-magnet-synchronous- generator (PMSG). The results of the simulations are presented by comparing the two aforementioned control methods under different water velocity conditions, and show that MPPT control delivers a superior electrical output.
Nguyen, Kenneth K., and Taufik Taufik. "MULTIPLE INPUT SINGLE OUTPUT CONVERTER WITH MAXIMUM POWER POINT TRACKING FOR RENEWABLE ENERGY APPLICATIONS." DigitalCommons@CalPoly, 2020. https://digitalcommons.calpoly.edu/theses/2180.
Повний текст джерелаVenkatraman, Chandrasekar. "Hill climbing digital control algorithm for maximum power point tracking of photovoltaic arrays." Laramie, Wyo. : University of Wyoming, 2006. http://proquest.umi.com/pqdweb?did=1320938081&sid=2&Fmt=2&clientId=18949&RQT=309&VName=PQD.
Повний текст джерелаHayman, Rebecca. "A DSP Algorithm for Multi-Channel Maximum Power Point Tracking in Photovoltaic Systems." Honors in the Major Thesis, University of Central Florida, 2004. http://digital.library.ucf.edu/cdm/ref/collection/ETH/id/719.
Повний текст джерелаBachelors
Engineering and Computer Science
Electrical Engineering
Persen, Todd. "FPGA-BASED DESIGN OF A MAXIMUM-POWER-POINT TRACKING SYSTEM FOR SPACE A." Master's thesis, University of Central Florida, 2004. http://digital.library.ucf.edu/cdm/ref/collection/ETD/id/3126.
Повний текст джерелаM.S.E.E.
Department of Electrical and Computer Engineering
Engineering and Computer Science
Electrical Engineering
CHEN, SHUI-YUAN, and 陳水源. "Maximum Power Point Tracking for Photovoltaic." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/59p652.
Повний текст джерела聖約翰科技大學
電機工程系碩士在職專班
104
This thesis presents a novel maximum power point tracking technique for photovoltaic. The proposed technique adjusts the operating point of a photovoltaic panel based on three physical characteristics of the photovoltaic panel: (a) the incremental surface temperature is positive correlation with the variation of sunlight intensity; (b) the normalized incremental voltage is greater than the normalized incremental current at the left-hand side of the maximum power point; and (c) the normalized incremental current is greater than the normalized incremental voltage at the right-hand side of the maximum power point. The proposed technique can correctly determine the operating point of a photovoltaic panel in rapidly changed irradiation, to improve the misjudgment defect of traditional techniques. The proposed technique enables photovoltaic panels can work close to the maximum power point under different sunlight intensity, to increase the electricity generation and efficiency of photovoltaic panels.
Nkashama, Cedrick Lupangu. "Maximum power point tracking algorithm for photovoltaic home power supply." Thesis, 2011. http://hdl.handle.net/10413/8321.
Повний текст джерелаThesis (M.Sc.Eng)-University of KwaZulu-Natal, Durban, 2011.
吳佳軒. "High- Power- Factor Wind Energy Maximum Power Point Tracking System." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/40661396549195311548.
Повний текст джерела國立彰化師範大學
電機工程學系
98
This paper proposed a high- power- factor wind energy maximum power point tracking system, which is composed of three “Single Phase Power-Controlled Power Factor Correctors(PFC)” and one “Maximum Power Point Tracking Controller(MPPTC)”. With PFC and MPPTC, the proposed system can increase the power factor in the circuit and obtain the maximum energy from the three-phase wind generator. Each “Single Phase Power-Controlled Power Factor Correctors” is composed of one single-phase rectifier, one full bridge converter, and one power factor corrector (PFC) IC UC3854; and “Maximum Power Point Tracking Controller” is implemented by one microchip “HT46R24” with maximum power point tracking (MPPT) algorithm. The proposed system has advantages that modulizes the system、increases the wind generator efficiency and decreases the noise of the wind generator. At last, the proposed system will be verified by implementation of a 600W prototype As experiment results, the proposed “high- power- factor wind energy maximum power point tracking system” not only reach a high power factor at 0.98, but also operate at the mpp under different wind velocity conditions, which improves the efficiency of the wind energy system effectively.
Cheng-JungHsieh and 謝政融. "Paralleled Wind Energy Power Converters with Maximum Power Point Tracking." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/73428233563263027990.
Повний текст джерела國立成功大學
電機工程學系
102
In recent years, permanent magnetic synchronous generator (PMSG) has been widely used in the wind power generation. A PMSG needs full-rated power converter to convert wind energy into electrical energy. Due to the increasing trend of power rating on the power converter; the power converter, however, usually operates at low wind speed. Paralleling PWM rectifiers to replace a full-rated power converter can reduce current stress of the converter and improve converter’s efficiency at low wind speed. However, paralleling PWM rectifiers may cause circulating current and distort the current waveform. In order to suppress circulating current, this thesis derives three phase rectifier model which includes generator, zero sequence impedance, and design a current controller accordingly. In addition, this research adopts a novel adaptive maximum power point tracking algorithm with current distribution strategy for the paralleling PWM rectifier. In contrast to traditional perturb and observe method, novel adaptive MPPT algorithm can be easily analyzed and determine wind change by feedback signal. The effectiveness of the circulating current suppression and maximum power tracking efficiency are verified by a wind turbine emulator.
Lin, Meng-Yen, and 林孟諺. "DSP-Based Maximum Power Point Tracking and Passive Tracking Biaxial System." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/s29muv.
Повний текст джерела國立宜蘭大學
電機工程學系碩士班
102
The purpose of this study is to develop solar energy control system with the functions of solar tracking and maximum power point tracking.Solar tracking system aims to track the position of the sun with the purposes of making the sun and solar panels form right-angled projection to obtain the maximization of solar energy. Solar tracking system designed in this study belongs to passive axis control system which means to control the dual-axis motor by means of longitude, latitude and time to calculate the angles of elevation and azimuth of the sun.The principles of maximum power point tracking are to adjust the duty cycle of the boost converter, aiming to change the output voltage and current of the solar cell to obtain the maximum power point. On literatures, the common maximum power point tracking method is incremental conductance.Proportion Integration Differentiation Like Fuzzy Control (PIDFC) was proposed in this research to improve the track efficiency of the maximum power point.Additionally, the conversion efficiency of the solar energy is susceptible to environmental temperature. Therefore, the temperature compensation mechanism was proposed with the purposes of adjusting dynamically the control command of the PIDFC and further achieving better power efficiency for the output power of the system. Finally, the differences between PIDFC maximum power point track control algorithm with the temperature compensation mechanism and the traditional MPPT as well as PID-MPPT were compared in this research. The results showed that system power, response time and stability were improved obviously.
Ming-ChingChou and 周明慶. "Nonlinear Impedance Identification Based Maximum Power Point Tracking." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/12487274765927861535.
Повний текст джерелаShen, Jia-Min, and 沈家民. "Novel Maximum Power Point Tracking Method for the Wind Power System." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/25574127849202253337.
Повний текст джерела國立高雄應用科技大學
電機工程系碩士班
95
The fossil fuels have been widely used to due the fast development of the industry, and it results in the problem of the exhaustion of fossil fuels and the damage of environment. The development of renewable energy sources will be the trend from the viewpoints of protecting environment and obtaining more energy sources. Wind power is one of the important renewable energy sources. If the wind energy can be used widely and effectively, the problems of energy demand, environment pollution and greenhouse effect can be relieved. Power converter interface is one of the key technologies for the wind power generator system, and the maximum power point tracking is one of the key technologies for power converter interface of the wind power generator system. In this thesis, a maximum power point tracking method for the permanent magnet synchronous wind power generator is proposed. A prototype is developed and tested to verify the performance of the proposed maximum power point tracking method. The experimental results show that the performance of proposed method can effectively track the maximum power of the permanent magnet synchronous wind power generator.
LI, YA-CHEN, and 李亞宸. "Maximum Power Point Tracking and Solar Power Prediction for PV Systems." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/bdgu87.
Повний текст джерела國立中正大學
電機工程研究所
107
This thesis applies the taguchi fractional order particle swarm optimization (TFPSO) with a 2kW series buck-boost converter and TI control circuit, which is self-developed and has functions of buck and boost, as the maximum power tracker (MPPT) of the solar photovoltaic system combine with solar power prediction. No matter under ideal environmental conditions or partial shading condition(PSC), the converter can operate at maximum power point. We train parameters to be the best for MPPT on computer simulation by using Taguchi method. To verify its performance, we conducted experiment base on single- peak power curve, double-peak power curve, triple-peak power curve, quadruple-peak power curve, insolation variations, and temperature variations. Results show that the proposed TFPSO has better performance then FPSO. Considering that 2kW polycrystalline solar photovoltaic panels are prone to aging problems, Therefore, the use of convolutional neural networks (CNN) for solar power prediction, and Compare and analyze the ideal power and predicted power. Keywords:Taguchi fractional order particle swarm optimization, CNN, MPPT
Chang, Chien-wei, and 張建偉. "Maximum Power Point Tracking control of a Photovoltaic System." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/11494283769074279613.
Повний текст джерела國立成功大學
航空太空工程學系碩博士班
97
Due to the energy crisis, renewable energy sources have been suggested as the possible solution. Among these sources, solar energy is pollution free and inexhaustible. Therefore it is a fairly good energy to generate electric power. However, the efficiency of solar cell is still very low, for that matter how to make the photovoltaic power system works in maximum power point is important. This thesis focuses on the maximum power point tracking control of photovoltaic power system. Owing to nonlinear I-V characteristics of photovoltaic cells, a maximum power point tracking algorithm is adopted to maximize the output power. In this thesis, An approach for maximum power point tracking using the sliding mode control is proposed. The proposed controller is robust to harsh environment changes and the performance of the controller is verified through simulations.
Wong, Cyuan-Jyun, and 翁銓均. "An Improved Solar System with Maximum Power Point Tracking." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/y9h49y.
Повний текст джерелаTsai, Ping-Chi, and 蔡秉其. "Small Wind Power System Analysis of Maximum Power Point Tracking Control Methods." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/7b2pbg.
Повний текст джерела中原大學
電機工程研究所
99
This report analyzes the differences of maximum power point tracking (MPPT) methods by using MATLAB simulations. Considering the small wind power system composed of a small wind turbine, permanent-magnet synchronous generator, three-phase full bridge rectifier, DC/DC converter, MPPT power controller, and load, we will find the problems for using traditional MPPT methods. Here the fuzzy logic control method as well as perturbation and observation method is utilized for the MPPT control under several cases with step, fixed, and variable speed wind. By the MATLAB simulation tests, the fuzzy logic control MPPT method is better than the perturbation and observation method.
Zhong, Fu-Jun, and 鐘富俊. "Implementation of Photovoltaic Power-Slope-Aided Incremental-Conductance Maximum Power Point Tracking." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/77201673802054929689.
Повний текст джерела中原大學
電機工程研究所
105
This thesis presents a power-slope-added incremental-conductance maximum power point tracking method (PS-INC MPPT) and the control method is realized by a photovoltaic buck converter. The PS-INC MPPT is carried out in two phases: incremental-conductance tracking (INC-tracking) is performed along with the I-V curve only in the INC zone; and the power-slope tracking (PS-tracking) is carried out on the PV curve to target the INC zone. The use of PS-INC MPPT method can eliminate the ambiguous incremental-conductance detection over the I-V curve of the left-hand side of the maximum power point (MPP), allowing the maximum power tracing to proceed smoothly. This technique retains the advantage of incremental-conductance tracking in the INC zone so that the MPP tracking can be achieved accurately and quickly. Finally, a 10 kW photovoltaic buck converter is demonstrated to realize the PS-INC MPPT method. Experimental results show that both the PS-tracking and the INC tracking are quick and accurate to meet the expected tracking theme.
Chou, Pin-Chun, and 周品君. "Design of Maximum-Power-Point-Tracking Control IC for Photovoltaic Power Systems." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/97065673520711207466.
Повний текст джерелаChen, Chun-Fu, and 陳群夫. "Maximum Power Point Tracking with BidirectionalPartial Power Regulation for Series Photovoltaic Panels." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/u8489d.
Повний текст джерела國立中山大學
電機工程學系研究所
106
This thesis proposes a maximum power point tracking (MPPT) scheme with bidirectional partial power regulation for a solar power system with a number of photovoltaic (PV) panels connected in series. To operate all PV panels at their maximum power points (MPPs), each panel is attached by a bidirectional flyback converter to add or subtract an adequate current to the PV current to flow into an identical series current. As a result, only a part of power is processed by the associated converters, most power is directly supplied to the load from the series PV panels. With such a configuration, none of the PV panels will be short-circuited, and hence no drastic change will happen on the output voltage, even though they are under extensively different irradiances. The system maximum power can be realized by allocating the identical series current at a specific MPP, at which, the associated flyback converters need not be activated, and at the same time the total processed power via the flyback converters can be minimized. A laboratory system composed of three PV panels with the associated bidirectional flyback converters is set up. Experimental results have demonstrated the feasibility and effectiveness of the proposed MPPT scheme under various partially shaded cases.
Chang, Min-Chun, and 張閔鈞. "Design of PV Power Conversion System Based on Maximum Power Point Tracking." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/5pv4qw.
Повний текст джерела國立中央大學
電機工程學系
107
This thesis mainly establishes a high-efficiency solar power conversion system, and cooperates with maximum power point tracking control and DC/DC boost converter with soft switching characteristics to improve the efficiency of the overall solar power generation system. The system proposed in this thesis is mainly divided into two parts. The first part is the discussion of the maximum power point tracking strategies. It analyzes the characteristics, advantages and disadvantages of various maximum power point tracking technologies. The second part is an investigation of DC/DC boost converter with soft switching characteristics to achieve maximum power point tracking and improve the input solar source to the voltage value required at the DC bus. Using zero-voltage switching technology, the voltage of the main circuit switch is first reduced to zero and then turned on to minimize the switching loss through the second auxiliary switch and the resonant circuit. The operation time of the second auxiliary switch is determined by the algorithm in the single chip to determine the best switching time. The soft-switching technology minimizes its switching loss, and combing the two parts to achieve a high-efficiency conversion system for the solar source.
Tzeng, Shian-de, and 曾獻德. "Development of a Wind Power System with Fuzzy-Logic Maximum Power Point Tracking." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/94799688295012942448.
Повний текст джерела國立聯合大學
電機工程學系碩士班
97
In this paper, we study the issue of maximum power tracking control in a wind power generation system. A fuzzy maximum power point tracking (Fuzzy MPPT) control with self-tuned scaling factor is proposed to improve the tracking response of the perturbation and observation (P&O) method. As applying P&O method in maximum power point tracking, a fast tracking would result in large oscillation around the operating point. Hence one has to make a compromise between the tracking speed and the stability of operating point. The proposed method provides a means to resolve this dilemma. In addition, in response to step change in the velocity of the wind, the proposed scheme also outperforms the P&O method. This feature makes the proposed wind power generation system being more applicable. In addition, only output voltage and current, without sensing the wind velocity, rotation speed and torque of the wind turbine, are required in implementing the proposed Fuzzy MPPT, which could reduce the cost and increase applicability in practice. The performance of the proposed Fuzzy MPPT is first verified by computer simulation with MATLAB/SIMULINK software. For experimental verification, a wind power generating system with utility parallel interface is built, in which an eZdsp F28335 development kit is employed to realize the three MPPT controllers: self-tuned and fixed scaling factor Fuzzy MPPT, and P&O method. The experimental results of these MPPT controllers are documented, and comparisons are made to illustrate the feasibility and superiority of our approach.
Cai, Jhih-Huei, and 蔡志輝. "Design of Maximum Power Point Tracking Control in Solar Power Using dsPIC30F4011 DSP." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/25661675672248485823.
Повний текст джерела崑山科技大學
電機工程研究所
102
Since the solar cell output power is changed with the sunshine and temperature, the solar cell cannot work at the maximum power point at any time, which wastes a lot of power. This dissertation mainly studies a maximum power point tracking method of the solar power, which can track the maximum power output of the solar cell quickly and stable. Even when the weather changes quickly, the proposed method can achieve rapid and precise control of the largest solar power output. The fuzzy-neural network control method is used to realize the maximum power point tracking, which control program is implemented by a dsPIC30F40111 DSP. The voltage and current of solar cell are measured by the dsPIC30F40111 DSP. Then the maximum power point is calculated using the fuzzy-neural network controller, and output PWM signal to control DC-DC converter, which deliver the maximum power of the solar cell to a load to achieve maximum power point tracking control. Finally, experimental results demonstrate that the proposed method can quickly and effectively track to maximum power point of a solar power.
Chen, Bo-Chih, and 陳柏志. "An Integrated Computer Simulation Program for Solar Power Maximum Power Point Tracking System." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/13554787212701363932.
Повний текст джерела淡江大學
航空太空工程學系碩士班
103
This thesis presents the development of an integrated computer simulation program for solar power maximum power point tracking system. The simulation framework mainly con-sists of three major parts, a PV simulation model, dynamic model of the SEPIC/Zeta/Synchronous four-switch type buck-boost converters, and fuzzy logic based maximum power point tracking algorithms. The maximum power point is achieved by con-tinuously adjust the duty ratio command for the power converter. First, we integrate the PV model and dynamic model of the converter in pure computer program. The simulation re-sults demonstrate the solar power system is feasible by using pure MATLAB computer pro-gram. Perturb and observe method, incremental conductance method, and fuzzy logic based MPPT controllers are then integrated into the simulation program. Final MATLAB based graphic user interface is designed to facilitate understanding of the MPPT system. The sys-tem can be used for both engineering and education purposes.
Chang, Chih-Kai, and 張智凱. "Implementation of Intelligent Maximum Power Point Tracking Control for Renewable Power Generation Systems." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/25638756976574788708.
Повний текст джерела國立中山大學
電機工程學系研究所
100
This thesis discusses the modeling of a micro-grid with photovoltaic (PV)-wind-fuel cell (FC) hybrid energy system and its operations. The system consists of the PV power, wind power, FC power, static var compensator (SVC) and an intelligent power controller. Wind and PV are primary power sources of the system, and an FC-electrolyzer combination is used as a backup and a long-term storage system. A simulation model for the micro-grid control of hybrid energy system has been developed using MATLAB/Simulink. A SVC was used to supply reactive power and regulate the voltage of the hybrid system. To achieve a fast and stable response for the real power control, the intelligent controller consists of a Radial Basis Function Network-Sliding Mode Control (RBFNSM) and a General Regression Neural Network (GRNN) for maximum power point tracking (MPPT). The pitch angle of wind turbine is controlled by RBFNSM, and the PV system uses GRNN, where the output signal is used to control the DC/DC boost converters to achieve the MPPT.
Lin, Jian-Jiun, and 林建均. "Analog Design of Maximum Power Point Tracking For Solar Charger." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/45075807464596199847.
Повний текст джерела國立臺灣大學
電子工程學研究所
96
Batteries have been used in many applications in our life. However, batteries must be charged by chargers to maintain its electrical energy. Because solar energy is clean and inexhaustible energy, using solar charger is economy and environmental protection. The thesis describes the design of maximum power point tracker (MPP Tracker) for solar cell. The maximum power point tracker is used be a solar charger which charging maximum output power of solar cell to batteries. The MPP Tracker has simplified structure because only one current sensor is needed. So it suit to implement by analog circuit. The circuit reduced switching losses of power switch by zero voltage switching.
Hsieh, Chih-Hsiang, and 謝志祥. "Fuzzy Maximum Power Point Tracking Control of Solar Photovoltaic Systems." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/32749464981634484309.
Повний текст джерела國立中興大學
電機工程學系所
98
In the global trend of energy saving and carbon emission reduction, the renewable energy development and greenhouse gas reduction have become one of the important issues for world electricity supply. Owing to the geometrical conditions of Taiwan, power generation using ocean current, solar and wind energy are the most promising. However, ocean current power generation technology has not been used effectively, while wind power applications are limited due to supply instability, environmental conditions and some high cost factors. In consideration of the natural environments and technology maturity under such conditions, solar photovoltaic power generation has been proven powerful in developing alternative energy. The purpose of this thesis is dedicated to develop maximum power point tracking (MPPT) controllers for solar photovoltaic cell arrays under no shading and under wind situations. After the development of the complete model of photovoltaic cells with the thermal dynamic model, such MPPT controllers are designed using sliding mode control method, gradient decent approach and fuzzy control logics. The effectiveness and merit of the proposed MPPT controllers are exemplified by conducting several simulations via Matlab/Simulink modeling.
Chen, Po-Cheng, and 陳柏成. "Asymmetrical Fuzzy Logic Control for Photovoltaic Maximum Power Point Tracking." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/52560778913659807256.
Повний текст джерела國立臺灣科技大學
電機工程系
103
In this dissertation, an asymmetrical fuzzy-logic-control (FLC) based maximum power point tracking (MPPT) algorithm for photovoltaic (PV) systems is presented. Two membership function (MF) design methodologies that can improve the effectiveness of the proposed asymmetrical FLC-based MPPT methods are then proposed. The first method can quickly determine the input MF setting values via the power–voltage (P–V) curve of solar cells under standard test conditions (STC). The second method uses the particle swarm optimization (PSO) technique to optimize the input MF setting values. Because the PSO approach must target a cost function and optimization, a cost function design methodology that meets the performance requirements of practical photovoltaic generation systems (PGSs) is also proposed. The proposed asymmetrical FLC-based MPPT algorithm is implemented using a low cost digital signal controller dsPIC33FJ16GS502. To validate the correctness and the effectiveness of the proposed method, a 300 W prototyping circuit is built and simulations as well as experiments are carried out accordingly. Compared with the symmetrical FLC-based MPPT method, the transient time and the MPPT tracking accuracy are improved by 25.8% and 0.93% under STC, respectively. Moreover, since the symmetrical FLC-based MPPT method fails to track the real MPP when irradiance level is low, the proposed asymmetrical FLC-based MPPT method can successfully deal with this problem. The advantages of the first MF design method are that it is simple and easy to adopt. The second MF design method applies the PSO technique to obtain the optimized input MF setting values. Compared with the first design method, the transient time and the MPP tracking accuracy can further be improved by 0.88% and 0.98%, respectively. This proves that PSO can be successfully applied to obtain the optimized MF setting values. In addition, the PSO optimized asymmetrical FLC-based MPPT method has the highest fitness value compared with other implemented methods.
Chen, Chih-Hsuan, and 陳至軒. "Maximal Power Point Tracking and Battery Charge of Wind Turbine." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/26692042996502787213.
Повний текст джерела遠東科技大學
電機工程研究所
103
This thesis proposes an intelligent control method implemented by FPGA chip for tracking the maximum power output of the wind turbine. Then store it in a battery which is charged by proposed charging program. From the computer simulation of Matlab/Simulink program to hardware circuit implementation to achieve the desired topic, maximum power point tracking (MPPT) and battery charging, The following hardware and software is completed. 1 Design a fuzzy controller to achieve DC voltage converter to track a reference voltage V_r by Matlab/Simpower tool to complete mathematical simulation analysis and to verify the effectiveness of the proposed controller. 2 Hall elements do not need to judge power change direction of wind turbine. Climbing method is used to adjust the PWM of the boost DC voltage converter to extract the maximum power output of the wind turbine. 3 To store different secondary battery load, the proposed Fuzzy control is used to adjust the output voltage of the DC voltage converter. 4 Integrating MPPT control, fuzzy control and battery charging control in an FPGA chip. 5 Completing constant current/voltage charging control.
Wang, Chien-Pin, and 王建斌. "Maximum Power Point Tracking Methods for Wind Energy Conversion System." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/27491473162595328286.
Повний текст джерела中原大學
電機工程研究所
93
The wind-turbine generation system (WTGS) exhibits a nonlinear characteristic and thus its maximum power point varies with changing atmospheric conditions. In order to have the WTGS operate at maximum power points under different wind speeds, the thesis proposes two maximum-power-point-tracking (MPPT) control methods of the slope-comparing (SC) and the power-difference-product (PDP) algorithms to be used in the WTGS. In the thesis, load models of the WTGS under different wind speeds are first built up for design of control rules and feasibility studies of the proposed MPPT methods. Based on the traditional current-type perturbation & observation (P&O) as well as the three-point-weighting comparison (TPWC) algorithms, comparisons are made for the proposed SC and PDP methods. In the practical system implementations, the MPPT methods are integrated in the TMS320C240 digital signal processor (DSP) to adjust the duty ratios of the buck-boost converter to control the WTGS working with maximum power output. To compare and verify the effectiveness of the four MPPT control methods mentioned above, a practical WTGS has been used. The WTGS includes a small wind turbine with three 1.17m diameter blades and a three-phase, 12-pole, 100W, small permanent-magnet synchronous generator. The experimental results show that the proposed PDP controller achieves the best performance in terms of maximum power tracking capabilities among the four MPPT algorithms, though all the four MPPT algorithms can reach maximum power points in different wind-speed conditions.
Yang, Chia-Heag, and 楊嘉亨. "Study of a Novel Photovoltaic Maximum Power Point Tracking Technique." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/44860275920064546219.
Повний текст джерела國立高雄應用科技大學
電機工程系碩士班
95
The thesis presents a novel maximum power point tracking (MPPT) technique which is based on modulating pulse width signal to obtain maximum power point. The output power of photovoltaic (PV) cells is converted into AC power through a bi-direction energy converter and then directly parallel to power system. The proposed MPPT technique has a good tracking speed without destroying original operation condition when executing MPPT. Furthermore, the bi-direction energy converter is designed to convert the DC power generated by PV cells into AC power system, in which the dc bus voltage of the converter is controlled by the concept of energy balance. The result shows that it has a good performance. In this thesis the designed hardware is first given a detailed interpretation of its operation principle and is simulated by MATLAB and Pspice, respectively. Then, an analog circuit is designed to implement the proposed MPPT technique and a GAL with a digital signal processor having the capability of calculating output current by the energy balance equation is designed to implement the bi-direction energy converter. The experiment results verify the performance and feasibility of the proposed MPPT technique.
Lin, Yu-cheng, and 林雨澄. "Comparison of Maximum Power Point Tracking Algorithms for Photovoltaic Systems." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/07707786674166895540.
Повний текст джерела龍華科技大學
電機工程研究所
99
In recent centuries, the rise of industry and consciousness technology makes the Earth's surface temperature increasing, and causes serious climate changes and natural disasters. To avoid rapid depletion of energy resources and environmental deterioration, it is global trend and urgent priority to search for available clean energy sources. Since solar power technology has advantages of clean, inexhaustible and easy to acquire, it obtains more and more attention to the international and scientific community. The purpose of this paper is to compare three maximum power point tracking (MPPT) algorithms in a photovoltaic simulation system. The Matlab/Simulink is used in this paper to establish a model of photovoltaic system with MPPT function. This system is developed by combining the models of established solar module and DC-DC boost converter with the algorithms of perturbation and observation (P&O), incremental conductance (INC) and hill climbing (HC), respectively. The system will be simulated under different climate conditions and MPPT algorithms. According to the comparisons of the simulation results, it can be observed that the photovoltaic simulation system can track the maximum power accurately using the three MPPT algorithms discussed in this paper. HC MPPT algorithm possesses fast dynamic response, but P&O MPPT algorithm is well regulated PV output voltage and power than HC algorithm. Since the deterministic process of INC algorithm is more complicated than the other two algorithms, therefore, the tracking time spent by INC algorithm is also a little longer than the other two algorithms. The HC method is suitable for the cases of battery charging which doesn't need to care about the output stability, and the P&O method is more suitable for the system with sophisticated electric devices. Furthermore, the INC method is adaptable to the cases of fast changing weather conditions owing to its advantage of no misjudgment.
Hung, Jia-Wei, and 洪嘉偉. "The Implementation of a Maximum Photovoltaic Power Point Tracking Circuit." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/25898636124451230131.
Повний текст джерела國立高雄應用科技大學
電機工程系博碩士班
102
The thesis aims to design a maximum photovoltaic power point tracking circuit. The basic concept of the proposed maximum power point tracking technique is based on approximating the characteristic curve of the photovoltaic power output by piecewise quadratic curves. At each step, the apex of the piecewise polynomial is used to be the next operation duty cycle so that the operation point can rapidly move to the maximum power point. To verify the feasibility of the proposed maximum power point tracking technique, we first implement an analog solar cell circuit which is used for simulating the maximum power point tracking experiments. Before to do this, each part of the circuit is simulated and analyzed by the relative software to testify its compliance with the output characteristics of solar cells. Based on the impedance matching for the overall tracking circuit, the equivalent input impedance of the solar cell is adjusted by controller to match the load impedance of the solar cell so that the operating point of the solar cell is moved to the maximum power point and the solar cell works at the maximum power point.
Jou, Bo-Tsung, and 周柏璁. "Implementation of a Solar Power Battery Energy Storage System with Maximum Power Point Tracking." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/92r3bu.
Повний текст джерела崑山科技大學
電機工程研究所
97
This work implements a solar power battery energy storage system(BESS)with maximum power point tracking(MPPT)under substantial variation in temperature and intensity of illumination. The tracker was designed using the perturbation and observation method to track rapidly the maximum power point of the energy output of the solar cells. The power generation data were transmitted to computers via RS232 for analysis and a battery charger was realized using a dsPIC30F chip. The maximum power was output following photovoltaic transformation under varying intensity of illumination and the power generated by the solar cells was fed back to the lead-acid battery to supply the load.
Lin, Yen-Chih, and 林彥志. "Maximum Power Point Tracking for a Wind Power System Using Doubly-fed Induction Generator." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/58187508650168654469.
Повний текст джерелаLai, Uei-Dar, and 賴威達. "Particle Swarm Optimization Based Maximum Power Point Tracking Control for Photovoltaic Power Generation Systems." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/02188115593714418301.
Повний текст джерела國立勤益科技大學
電機工程系
101
The main purpose of this thesis is to propose a maximum power point tracking (MPPT) algorithm for photovoltaic (PV) module array under considering the module shadow and fault. The proposed maximum power point tracking method is based on a modified particle swarm optimization (PSO) method to reach the real maximum power point (MPP) with multi-peak power-voltage (P-V) output curve for PV module array under considering the module shadow and fault. At first, Solar Pro software is used to capture the parameters of open-circuit voltage and short-circuit current for PV module array under different shadow conditions according to the HIP 2717 PV module. Accordingly, a module simulator circuit is made to implement the shadow conditions for PV module array under module shadow or fault. In addition, Pspice is used to pick up some simulation cases of 2-peaks, 3-peaks and 4-peaks of P-V curve under module shadow or fault for Matlab simulations to compare the MPPT performance between traditional PSO and modified PSO algorithms. As the simulation result, modified PSO algorithm performs performance well than the traditional PSO. Finally, a PIC microcontroller was adopted to implement the traditional PSO and modified PSO algorithm to carry out the MPPT with the multi-peak cases of P-V curve for the PV module array under module shadow or fault. The experimental results also verify that the modified PSO algorithm posses better tracking response and accuracy than traditional PSO method.
Chen, Mu-Jia, and 陳慕佳. "Using Extension Sliding Mode Controllerfor Maximum Power Point Tracking of Photovoltaic Power Generation Systems." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/73874970819582294285.
Повний текст джерела國立勤益科技大學
電機工程系
101
When sunlight intensity and temperature change, the output voltage, current and power of photovoltaic power generation system would be unstable and reduce the efficiency. To make photovoltaic power generation systems output power maximum in any condition, the extension sliding mode controller is proposed in this paper to track maximum power of photovoltaic power generation systems. First, the proposed method uses extension theory to determine gain value η, making the output power reach maximum power point stably and increasing power efficiency. This paper utilizes MATLAB to simulate the output power curve of photovoltaic power generation system. Also it compares the simulation result with other method, it offers better effect in response time and more stable. Finally, we use chip to achieve the proposed method and to verify its usability.