An Adaptive Incremental Conductance Mppt In Photovoltaic Array

1424 words - 6 pages

Abstract-Many different techniques for maximum power point tracking of photovoltaic arrays were introduced. This paper develops an adaptive maximum power point tracking (MPPT) algorithm for optimizing solar array performance based on incremental conductance (INC) and gradient descent algorithm .In conventional INC method the step size determines how fast the MPP is tracked. Fast tracking can be achieved with bigger increments but the system might not operate exactly at the MPP and oscillate about it instead; so there is a tradeoff between the time needed to reach the MPP and the oscillation error. In this work we have an adaptive step that brings the operating point of the PV array close to the MPP with a bigger step size and then uses INC to exactly track the MPP with a lower step. The experimental results show the notable improvement in the time needed to reach the MPP and also minor oscillation error which increases the accuracy of the system. The method was simulated in PSIM.

Index Terms—Maximum Power Point Tracking (MPPT), Incremental conductance (INC), Adaptive incremental conductance (AINC)

Solar energy is one of the most important renewable energy sources that has been gaining increased attention in recent years. Solar energy is plentiful; it has the greatest availability compared to other energy sources. The amount of energy supplied to the earth in one day by the sun is sufficient to power the total energy needs of the earth for one year [1]. Nowadays research on solar power generates great interest in achieving the only aim to get the maximum energy that PV can provide. The power generated from a given PV module mainly depends on solar irradiance and temperature. For optimal operation of a PV module, its terminal voltage must be equal to the corresponding MPP value. To achieve these goals, various conventional MPP tracking (MPPT) algorithms[2,3] such as Incremental Conductance, Perturbation and Observation (P&O), Hill Climbing, Parasitic Capacitance and Constant Voltage and Current algorithm. Although its complexity, most usual MPPT algorithm is Incremental Conductance due to several advantages that presents in comparison with others have been proposed and used to extract maximum power from PV arrays under different operating conditions. Current research in the field of Maximum Power Point Trackers focuses on new and more flexible ways for duty ratio step size changing. In this paper, a new approach of incremental conductance (INC) algorithm which makes use of a variable step of desirable voltage change is presented by an adaptive method. This algorithm is applied on a DC/DC boost converter. The whole system is simulated using PSIM and some useful results are presented.

PV Models and Equivalent Circuits
A PV model can be expressed by the equivalent circuit shown in Figure 1 This model is also known as a single-diode model In this model, open-circuit voltage and short-circuit current are the key parameters....

Find Another Essay On An Adaptive Incremental Conductance MPPT in Photovoltaic Array

energy Essay

6173 words - 25 pages Laboratories, ENTECH, and 3M Corp. The system was dismantled a few years ago and donated to a non-profit organization in the Texas panhandle. At the time it was the oldest continuously-operated system of its kind in the country [11, 27]. 342 kW System in Atlanta This system was installed at the Georgia Institute of Technology in Atlanta as a demonstration project for the 1996 Summer Olympics. An array of 2856 photovoltaic modules, each with 72

Types of Inverters for Generated Solar Power with Grid Power

1078 words - 5 pages monitored in detail. The inverter uses a single-stage two-phase isolated fly-back as shown in Fig. 5. Five large electrolytic capacitors are connected across the PV array to filter the ripple current from the converter and ensure efficient power tracking. Using a two-phase topology also helps in reducing current ripple. Finally, an SCR bridge connecting the AC side allows the appropriate switching of phases as the line voltage inverts twice a period

An Optimal Solar Power Management System with Maximum Output Control

1833 words - 8 pages Management System Design for Energy Harvesting Applications”, IEEE Trans.2007. 3.S. Bandyopadhyay and A. P. Chandrakasan, “Platform architecture for solar, thermal, and vibration energy combining with MPPT and single inductor,” IEEE J. Solid-State Circuits, vol. 47, no. 9, pp. 2199–2215, Sep. 2012. 4. S. H. Jung, N. S. Jung, J. T. Hwang, and G. H. Cho, “An integrated CMOS DC-DC converter for battery-operated systems,” in Proc. IEEE PESC, Aug. 1999, pp

Solar cell technology

2434 words - 10 pages achieved more than 10 percent efficiency. Somewhere around 1982 Boeing and Kodak fabricated the first thin film photovoltaic cells. In 1985, the Carissa Plains plant was added to Southern California Edison's System. That project was later dismantled. Later on in 1989, a concentrator solar cell, a type of device in which sunlight is concentrated onto the cell surface by means of lenses achieved an efficiency of 37 percent because of the increased

The Solar power energy

744 words - 3 pages photovoltaic arrays has advanced considerably in recent years. The first practical application of photovoltaic cell is to power orbiting satellites and other spacecraft. Another great example of the PV module is on the grids to connect with the power generation. In this case, an inverter is required to convert the Direct current to and alternate current. The cells that are mounted on a grid require protection from the environment; therefore, are usually

The Viability of Small Solar Energy Systems Installation

820 words - 4 pages My neighbor recently asked my opinion of her possible entry into the solar energy installation market in the Midwest Region as an installer of small solar photovoltaic energy systems (PV systems) for homes and small businesses. She believes renewable energy results in cost savings, and government subsidies make the idea more attractive to potential clients. However, she expressed concern about the financial risk and potential profitability of

Stand Alone renewable hybrid energy system

876 words - 4 pages ) during low wind speed as well as high wind speed conditions. The tip speed ratio has to be brought to a particular value to achieve MPPT during low speed conditions. This can be done by adjusting the electromagnetic torque of the generator by employing suitable power electronic controllers so that the quadrature axis component (the torque-producing component) of current in the three phase AC generator is appropriately manipulated. During higher wind

Electrolyte Challenge

1400 words - 6 pages conductance of 0.0835 milliamps, which is interesting as it would be thought that it would have no electrolytes. However, it has not been purified like bottled water, so it still contains some minerals and electrolytes. In the battle of the best sports drink, Powerade was found to have more electrolytes than Gatorade, with an average conductance of 0.3155 milliamps compared to 0.207 milliamps. Works Cited "Choosing the Best Sports Drink | Runners

photovoltaic system

1143 words - 5 pages . Photovoltaic cells or solar cells are grouped and connected together in a single frame called a panel or modüle. These cells consist of special semi-conductive materials,which are the most often a piece of silicon positioned under a layer of thin glass. The current they produce can be used immediately,may be stored in rechargeable batteries or can be fed into the power grid and sold to the electic company. A photovoltaic system is an arrangement

Solar Spectrum in the Electromegnetic Spectrum: Solar Cells

2031 words - 9 pages production. The most common type of collector is the flat plate collector, an array of solar panels arranged in a plane. The output of these collectors is directly related to the size, cleanliness and amount of solar radiation they are exposed to. [3] The photovoltaics available on the market today are only about 15% efficient [4] nut advances in technology have recently produced a solar cell with a staggering 44.7% efficiency. [5] At today’s 15

Photovoltaic Panels

1103 words - 4 pages as an electric current. The process ends when the electrons return to the bottom silicon layer. Photovoltaic panels are easy to maintain. They just need to be clean enough to expose the silicon to light in order for the energy to be harvested.Photovoltaic energy is great energy source that can beneficially be used in the future. This can see that clearly from its pros and cons. One positive point is that it does not pollute the environment. It

Similar Essays

Utilization Of Green And Renewable Energy

1505 words - 7 pages concept of DC-DC converter, Microcontroller, ADC( Analog to Digital Conversion), Feedback, LCD(Liquid Crystal Display). At last I will brief about the comparison of different algorithm implemented to reach at MPP and conclude about the efficiency of it. So this is how the complete phenomena will take place in the report. What is MPPT(Maximum Power Point Tracker) ? MPPT is an electronic system that operates the photovoltaic

Renewable Energy Resources: Solar Energy Essay

2194 words - 9 pages POINT TRACKING (MPPT) Maximum Power Point Tracking, frequently referred to as MPPT, is an electronic system that operates the Photovoltaic (PV) modules in a manner that allows the modules to track the maximum power. Thus it increases the efficiency of the photovoltaic system. They are different types of MPPT algorithms are available. Such as perturb & observe method, incremental conductance, fuzzy logic controller, neural networks. Fuzzy Logic MPPT

Pv Statcom And Total Harmonic Distotion Analysis

2049 words - 8 pages when the energy from the sunrays is not utilized at the moment this is present in nature, this is disoriented for good. A maximum power point tracker (MPPT) is a power electronic DC-DC converter inserted between the PV array and its load to achieve optimum matching. The photovoltaic output current (Ipv) and output voltage (Vpv) are passed through a first order low pass filter with a magnitude of G = 1 and a time constant of T = 0.01 seconds in

Renewable Energy: Photovoltaic Technology Essay

1763 words - 8 pages is used. A MPPT is an electronic instrument that ensures operation of the PV source at the MPP during different environmental conditions. This is done by ensuring the PV array provides the correct amount of current for operation at MPP. It should not be confused with electromechanical mechanisms that track the sun throughout the course of the day to maximize direct exposure to the sun. A graph showing the MPPT behavior is show in the figure