Incremental Conductance MPPT TechniqueFOR PV System

2013

Solar power being a renewable energy resource has tremendous potential of usage in the imminent future and this paper is going to discuss an effective strategy to maximize solar energy harvest. This study has been done using MATLAB/Simulink combining solar modules, incremental conductance MPPT algorithm block and boost converter control block. Though solar energy harvest is dependent of irradiance, temperature and other climatic conditions it is imperative that a photovoltaic system operates at a maximum power point (MPP) in order to extract maximum energy from the system. The incremental conductance algorithm is an energy optimization strategy that provides fast dynamic response and well regulated photovoltaic (PV) output voltages. In addition, the number of parameter needed to be monitored are significantly lower than other algorithms, making the implementation much more streamlined and cost effective. This paper is going to discuss the observations of maximum power point tracking...

Solar panels have a nonlinear voltagecurrent characteristic, with a distinct maximum power point (MPP), which depends on the environmental factors, such as temperature and irradiation. In order to continuously harvest maximum power from the solar panels, they have to operate at their MPP despite the inevitable changes in the environment. This is why the controllers of all solar power electronic converters employ some method for maximum power point tracking (MPPT). Over the past decades many MPPT techniques have been published. In this thesis two MPPT Methods i.e. Incremental Conductance and Modified InCond methods are studied and compared.

Journal of Renewable Energies

This study discusses the design of the Maximum Power Point Tracking (MPPT) technique for photovoltaic (PV) systems employing a modified incremental conductance (IncCond) algorithm to extract maximum power from a PV module. A PV module, a DC-DC converter, and a resistive load constitute the PV system. In the scientific literature, it is well-documented that typical MPPT algorithms have significant drawbacks, such as fluctuations around the MPP and poor tracking during a sudden change in atmospheric conditions. To solve the deficiencies of conventional methodology, a novel modified IncCond method is proposed in this study. The simulation results demonstrate that the updated IncCond algorithm presented allows for less oscillation around the maximum power point (MPP), a rapid dynamic response, and superior performance.

Completing the design for the model of photovoltaic array and achieving to track the array's maximum power point by the help of Incremental Conductance Method. This article firstly introduces a practical model of photovoltaic cells, by which the photovoltaic array`s model is obtained. To achieve the maximum power point tracking the Incremental Conductance method is used. Finally, with the help of embedded MATLAB function the article succeeds to achieve the algorithm. Simulation results show the accuracy of the PV model and the practical value in the algorithm which has better tracking performance and dynamic characteristics.

2017

The maximum power point tracking (MPPT) technique is used in photovoltaic systems to extract the maximum power. The most popular MPPT technique is the incremental conductance because it is less complicated and has a good tracking accuracy. This work is an attempt to study and discuss four types of the incremental conductance method, namely: Incremental Conductance with fixed step size (FS_IC), Incremental Conductance with variable step size (VS_IC), Incremental Conductance with first proposition of modified variable step size (MVS1_IC) and Incremental Conductance with second proposition of modified variable step size (MVS2_IC), these four techniques are simulated by Psim software. Results show the good tracking efficiency of the MVS1_IC and MVS2_IC techniques compared to FS_IC and VS_IC, also the MVS2_IC MPPT algorithm is the most efficient and presented less energy loss. Keywords— Incremental Conductance, MPPT, Photovoltaic (PV),

2011 Canadian Conference on Electrical and Computer Engineering, CCECE 2011, 2011

This paper presents incremental conductance method for maximum power point tracking (MPPT) using DC-DC cuk converter. Comprehensive analysis and simulation of KC85T solar module and equivalent electric circuit are provided while effects of various environmental conditions on the PV module behavior is investigated. In order to fully understand the PV module working specifications fundamental characteristics of PV cells are discussed. Block diagram model of a PV module was developed in Simulink for plotting the curves. KC85T solar module is used in simulations and results indicate speed and accuracy of the proposed system.

Solar energy is a potential energy source in Indonesia.A photovoltaic is needed to harvest this kind of energy, and to be able to gather the most, the PV must have a good efficiency. The maximum efficiency is achieved when PV works at its maximum power point which depends on irradiation and temperature. Since the irradiation and temperature always change with time, a PV system which able to track the maximum power point needs to be developed to produce more energy. This research was aimed to explore the performance of a maximum power point tracking system which implements Incremental Conductance (IC) method. The IC algorithm was designed to control the duty cycle of Buck Boost converter and to ensure the MPPT work at its maximum efficiency. The system performance of IC algorithm was compared to widely used algorithm - Perturb and Observe (P&O) on a Simulink environment. From the simulation, the IC method shows a better performance and also has a lower oscillation.

Energy Procedia, 2014

Photovoltaic (PV) energy is the most important energy resource since it is clean, pollution free, and inexhaustible. The output power of PV arrays is always changing with weather conditions, i.e., solar irradiation and atmospheric temperature. Therefore, a MPPT control to extract maximum power from the PV arrays at real time becomes indispensable in PV generation system. In recent years, a large number of techniques have been proposed for tracking the maximum power point (MPP). Maximum power point tracking (MPPT) is used in photovoltaic (PV) systems to maximize the photovoltaic array output power, irrespective of the temperature and radiation conditions and of the load electrical characteristics the PV array output power is used to directly control the dc/dc converter, thus reducing the complexity of the system. The resulting system has high-efficiency; lower-cost this paper proposes a maximum-PowerPoint tracking (MPPT) method with a simple algorithm for photovoltaic (PV) power generation systems. The method is based on use of an Incremental conductance of the PV to determine an optimum operating current for the maximum output power. This work proposes on Investigation of Incremental conductance Based maximum Power Point Tracking for Photovoltaic System, to have the advantages of low frequency switching.

Smart Grid and Renewable Energy, 2022

Maximum Power Point Tracking (MPPT) is an important process in Photovoltaic (PV) systems because of the need to extract maximum power from PV panels used in these systems. Without the ability to track and have PV panels operate at its maximum power point (MPP) entails power losses; resulting in high cost since more panels will be required to provide specified energy needs. To achieve high efficiency and low cost, MPPT has therefore become an imperative in PV systems. In this study, an MPP tracker is modeled using the IC algorithm and its behavior under rapidly changing environmental conditions of temperature and irradiation levels is investigated. This algorithm, based on knowledge of the variation of the conductance of PV cells and the operating point with respect to the voltage and current of the panel calculates the slope of the power characteristics to determine the MPP as the peak of the curve. A simple circuit model of the DC-DC boost converter connected to a PV panel is used in the simulation; and the output of the boost converter is fed through a 3-phase inverter to an electricity grid. The model was simulated and tested using MATLAB/Simulink. Simulation results show the effectiveness of the IC algorithm for tracking the MPP in PV systems operating under rapidly changing temperatures and irradiations with a settling time of 2 seconds. Keywords Modeling, Simulation, PV System, Maximum Power Point Tracking (MPPT), Incremental Conductance Algorithm, MATLAB/Simulink

4th International Conference on Energy and Environment 2013, ICEE 2013, 2013

This paper proposed an improved incremental conductance method to track the Maximum Power Point (MPP) for PV Panel under fast changing solar irradiation. When there is increment in solar irradiation level, the conventional incremental conductance method is confused and responses incorrectly. The proposed method response correctly and there is no steady state oscillation compared to the conventional method. Matlab simulation is carried out for both the improved and conventional incremental conductance method under fast changing solar irradiation level. The simulation results showed the system able to track the MPP faster than the conventional method. © Published under licence by IOP Publishing Ltd. iopscience.iop.org/1755-1315/16/1/012017