Ramabadran Ramaprabha

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The global electrical energy consumption is steadily rising and therefore there is a continuous demand to increase the power generation capacity. Increasing prices of fossil fuels and awareness of global warming have drawn attention towards the use of Solar Photo Voltaic Cells as an alternative source of electric power. Experimental determination of(More)
Increasing prices of fossil fuels and awareness of global warming have drawn attention towards the use of Solar Photo Voltaic Cells as an alternative source of electric power. Experimental determination of voltage-current characteristic of a solar panel is required for its simulation and setting the parameters of the circuit for extracting maximum power. An(More)
This paper presents a neural network controller scheme for boost converters. This controller is designed to stabilize the output voltage of the boost converter and to improve its performance during transient operations. To investigate the effectiveness of the proposed controller, certain operations such as starting up and reference voltage variations are(More)
The usage of solar photovoltaic (PV) system in grid connected system becomes more popular nowadays. The major problem in using solar PV system is its instability and dependence of output energy. In order to stabilize the energy output and to get the smoothened profile, the power converter must be connected to the output of the PV panel. For this purpose the(More)
This paper presents an extraction of maximum energy from Solar Photovoltaic Array (SPVA) under partial shaded conditions by optimum selection of array size using Particle Swarm Optimization (PSO) technique. In this paper a detailed study on the output reduction of different SPVA configurations under partial shaded conditions have been carried out. A(More)
Solar energy is a green energy which is not only perennial but also accessible to every strata of the world. An easy way to convert solar energy into electric energy is to use Solar Photovoltaic (SPV) system. Solar panel is a power source having nonlinear internal resistance. As the intensity of light falling on the panel varies, its voltage as well as its(More)
Partial shading has been identified as a major cause of reducing energy yield in a large solar photovoltaic array (SPVA). Partial shading may be due to due to tree leaves falling over it, birds or bird litters on the array, shade of a neighboring construction, passing clouds etc. Under partial shaded conditions the PV characteristics get more complex with(More)
Solar panel is a power source having nonlinear internal resistance. As the intensity of light falling on the panel varies, its voltage as well as its internal resistance both varies. To extract maximum power from the panel, the load resistance should be equal to the internal resistance of the panel. Maximum power point trackers (MPPT) are used to operate a(More)
This paper presents the modified Fibonacci search based MPPT scheme for a solar photo voltaic array (SPVA) under partial shaded conditions. The real Fibonacci search based MPPT fails to track the global peak (GP) under partial shaded conditions. This paper improves the method so that the proposed method tracks GP for all the shaded conditions. It is checked(More)