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this paper presents an adaptive photovoltaic (PV)-based independent public LED street lighting system. A bidirectional LED driver powered by an 80 MHz TM4C123GH6PM microcontroller is used in this system to charge the battery as well as drive the LED. The system use a hybrid charging method that is combined between three-stage charging method and an improved voltage based maximum power point tracking...
In this paper, we analyze the conception, the realization, and the optimization of a photovoltaic system (PV) adapted by a converter DC / DC of Buck type and an analogical MPPT command provided with a detection circuit of the dysfunction and convergence of the system (CDCS). The CDCS circuit allows assuring an optimal functioning of the PV panels independently in the variations of the conditions meteorological...
The power-voltage characteristic curve of solar PV modules has a multiple local maximum under partial shading conditions; in this case the conventional MPPT methods fail to track the real maximum power point which reduces the efficiency of the photovoltaic system. To keep the PV modules operate with their maximum power, this paper places a novel algorithm which is able to detect and track the global...
Paper proposes a digital design for the maximum power point tracker (MPPT) controller which is used for extracting maximum power from the photovoltaic (PV) system and supplying it to the batteries or grid under changing illumination and loads. The proposed digital controller circuit is very much distinguishing from the previous MPPT circuit. This circuit uses minimum power, processing time, and area...
In this paper, a maximum power point tracking (MPPT) system for indoors photovoltaic transducers is presented. The proposed system is used in conjunction with a switching DC-DC boost converter that generates a 1.2 V output for the circuits of the ultra-low-power application. The MPPT tracks different illumination intensities through changing the input impedance of the boost converter. The open circuit...
In this work, we analyze the design and simulation of the electrical operation of a photovoltaic (PV) system adapted by a numerical intelligent controller (MPPT controller) ensuring the pursuit of the maximum power supplied by the photovoltaic generator despite the change of weather conditions. Particularly, we present the effect of meteorological conditions on the performance of a photovoltaic generator...
A known problem in the literature of the Perturb and Observe (P&O) algorithm with higher power point tracking is the tracking error under fast changes in sunlight irradiance, which causes efficiency loss. The main cause of this erratic behavior is that the converter cannot distinguish whether the change of power generated by the panel is coming from a change made by the converter algorithm or...
Photovoltaic power generation technology is already quite mature. But the conversion efficiency of the silicon cells which are heavily used now remains stagnant. Besides, large amounts of energy will be consumed during the process of production. It also makes serious pollution. Thus, to maximize utilization of solar cells will undoubtedly have a huge problem about economic and environmental benefits...
This paper researches a lighting control system based on lighting emitting diodes (LEDs) as lighting source, solar energy as primary source and batteries as secondary source. Maximum power point tracker (MPPT) and the battery state (charged/discharged) are contained in this system. It presents a way to charge the batteries called uniform charging method and a new type high frequency impulse LED driving...
In this paper, a sliding mode technique is used to control an indirect field oriented induction motor pump which is supplied by a photovoltaic generator. After the model of the system is described, the sliding mode control SMC rule applied to the system is given. Then, the maximum power point tracking algorithm MPPT which is used to map the illumination value to the speed of the induction motor is...
Aimed at the shortcomings that traditional fuzzy logic control method for solar LED illumination system maximum power point tracking (MPPT) control system, a novel solar LED illumination control strategy based on variable univers adaptive fuzzy PID controller is proposed.The controller can automatically adjusts the variable univers with the change of photovoltaic output power deviation, to realize...
Every photovoltaic (PV) array has unique point at which maximum power can be generated and extracted for different atmospheric conditions and output load. The maximum power point tracking is therefore critical for the success of PV arrays. All methods proposed earlier suffer from slow response; they oscillate around the maximum power point and ignoring the atmospheric conditions changing. This paper...
Due to relatively high initial cost of the PV arrays, full utilization of the arrays output power is highly demanded in photovoltaic (PV) systems. The high tracking accuracy and perfect steady state characteristics of the PV model-based maximum power point tracking (MPPT) techniques has drawn a great attention toward these schemes in the past few years. Despite of the accuracy, the model-based MPPT...
Photovoltaic (PV) arrays are always assembled based on centralized, string and multi-string technology. These complex configurations of PV arrays and non-dependent maximum power point tracking (MPPT) algorithms based on PV arrays but not PV modules lead to the low output power efficiency of PV arrays. In view of the above questions, this paper analyzes the output characteristics of PV arrays under...
This paper presents a efficient stand-alone battery photovoltaic (PV) lighting system which can provide functional illumination based on power light-emitting diodes (PLEDs). PLED with specific features of small size, long life and high-brightness light will be choices of future light sources. The PLEDs are feed using a lead acid battery that is charged with a PV panel. This paper presents an interface...
This paper presents a novel maximum power limiting (MPL) technology for the photovoltaic system. Most conventional MPPT technologies in the photovoltaic system are implemented with digital control circuit, which causes the cost-consuming issue. Therefore, the proposed MPL photovoltaic system can be implemented with analog control circuit, which is substituted for the digital control circuit. By associating...
It has been demonstrated that performing localized maximum peak power tracking (MPPT) on each photovoltaic (PV) panel, instead of using a single MPPT controller across the PV string can substantially increase the total harvested power, since each panel experiences unique illumination and temperature conditions. In this work, the effect of the dc-dc converter efficiency on the power savings from distributed...
Photovoltaic power generation systems are vulnerable to weather, resulting in a decline in power generation efficiency. Therefore, it is necessary to use maximum power point tracking technology. This paper proposes a novel variable step size maximum power point tracking algorithm through analysising the photovoltaic power generation model and comparing the commonly used algorithms, such as the constant-voltage...
Photovoltaic application of LED lighting has been a hot trend in residential illumination, for it integrates the advantages of both the PV systems and LED lights. However, it has a series of problems, such as high thermal loss, poor reliability, and a short life span. To address these problems, this paper presents a deep research on the whole system from a low-cost, high-efficiency and long-life point...
A new technique for maximum power point tracking (MPPT) of photovoltaic (PV) modules has been developed with the aim of maximizing their efficiency of photovoltaic energy conversion. The Particle Swarm Optimization (PSO) algorithm has been employed in this work to track the Maximum Power Points (MPPs) of PV modules under partial and rapidly varying insolation conditions. Experimental arrangements...
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