Conference Papers

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    Performance study of roof top wind solar microgrid system in isolated mode of operation
    (Institute of Electrical and Electronics Engineers Inc., 2014) Gaonkar, D.N.; Sabhahit, N.S.; Raghavendra, P.
    The increasing interconnection of distributed generation sources of diverse technologies to low voltage grids introduces considerable complexity in its operation and control. The concept of the microgrid is emerging as a solution to this and also to take full advantage of the potential offered by distributed generation resources. In this paper the performance study of a roof top wind solar hybrid microgrid in isolated mode of operation has been presented. The developed 10 kW microgrid consists of two wind turbine of 3.2 kW each and a PV system of 3.6 kW peak. The microgrid is interfaced to the load through a voltage source inverter. The performance of wind system in the developed microgrid has been investigated under different input conditions and practical results have been reported in this paper. © 2014 IEEE.
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    Maximum power point tracking of PV array under non-uniform irradiance using artificial neural network
    (Institute of Electrical and Electronics Engineers Inc., 2015) Ramana, V.V.; Jena, D.
    This paper presents a maximum power point tracking (MPPT) method for tracking the global peak (GP) of photovoltaic (PV) array under non-uniform irradiance using artificial neural network (ANN). A feed forward multilayer perceptron model with Levenberg - Marquardt back propagation algorithm is used for tracking the global peak. The MPPT algorithm takes irradiance of PV modules as input and gives duty ratio of boost converter as output. The MPPT presented using ANN is compared with conventional hill climbing (HC) method and the actual values obtained from the P-V characteristics. Root Mean Square Error (RMSE) of PV array output power is calculated for both hill climbing method and proposed ANN method. Finally, a qualitative comparison is made between hill climbing method and ANN method. © 2015 IEEE.
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    Efficient global peak tracking of PV system under mismatching conditions using searching technique and bisection method
    (Institute of Electrical and Electronics Engineers Inc., 2018) Ramana, V.V.; Mudlapur, A.; Damodaran, R.; Balasubramanian, B.; Mishra, S.
    Rapidly increasing energy demand is leading to increase in installation of photovoltaic (PV) plants across the globe. The PV modules are subjected to various conditions like shading, soiling and degradation because of which the performance of PV panels deteriorates. This will affect the characteristics of PV module which may lead to several stairs in I-V curves and several peaks in P-V curve. In this paper the various causes of occurrences of mismatching conditions are analyzed. An efficient two stage algorithm that tracks global maximum power point (GMPP) accurately under such mismatching conditions is proposed in the paper. In the first stage, a simple searching technique and bisection method are used to bring the operating point to the proximity of global maximum. In the second stage, hill climbing method maintains the operating point at global peak. MATLAB Simulations and experimental verifications are performed for validating the proposed approach. © 2018 IEEE.
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    Theoretical Increase in Power Output of Si-Based Photo-Voltaic Cell by Series Connected Metallic Photocathodes
    (Institute of Electrical and Electronics Engineers Inc., 2019) Dutta, N.; Perumal, V.
    Modern photoelectric devices specially doped Silicon-based photovoltaic modules present a major roadblock in generating power as they deliver only a part of the incident solar energy, which is about fifteen to twenty percent of polycrystalline cells. This results in having a large space requirement for solar power generation for a considerable megawatt output. Present technologies that offer high efficiencies are mostly based on very costly materials like Gallium-Arsenide (GaAs). The silicon processing technique of manufacturing monocrystalline cells also makes it costly for large-scale power generation requirements. This paper tries to propose a novel alternative solution to the problem by incorporating cheaply available alkali metal like Sodium as metallic photocathodes connected to the n-doped side of the photovoltaic cell that is exposed sunlight instead of solely using silver contacts to improve the efficiency of the typical polycrystalline photovoltaic cell. Sodium can also be laid out as a metal track around the cell, depending on the production cost and spatial requirements. © 2019 IEEE.