Performance enhancement of photovoltaic array configurations with blocking p-mosfets under partial shading condition

ABSTRACT

Being the most abundant renewable source of energy, photovoltaic arrays (PVA) are extensively used for power generation. A number of factors influence performance of the PVAs, among which complete or partial shading of PVAs is perceived as a major concern for the researchers. Complete or partial shading reasonably reduces the output power of PVAs which subsequently leads to multiple maximum power points (MPPs) in the P-V curves. One of its major consequences is reverse power flow, conventionally blocking diodes (BD) based on different configuration are utilized to limit the adverse effects of reverse power flow. This paper proposes a novel scheme to improvise performance of the photovoltaic array configuration (PVAC) under-shaded condition, in which conventionally used BDs are replaced by blocking P-MOSFET (BP-MOS). A comparison study is carried out to determine performance of four different PVAC’s such as series-parallel (SP), total-cross-tied (TCT), bridge-link (BL), and honey-comb (HC) employing BDs as well as BP-MOS. Simulations are accomplished on MATLAB/SIMULINK, in order to analyze practical implications of preferred the PVAC under various illumination conditions (such as horizontal, vertical, and diagonal). Obtained results reveal efficacy of the proposed configuration in terms of least power loss, increased fill factor, and thus maximum efficiency.

KEYWORDS:

• Blocking Diodes
• fill Factor
• maximum Power Point
• partial Shaded Condition
• Power Loss

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Additional information

Notes on contributors

Gitanjali Mehta

Shahroz Anjum received her B. Tech degree in Electrical Engineering from College of Engineering, Roorkee and her M. Tech degree in Power Systems from Thapar University. Presently she is pursuing Ph. D from Department of Electrical Engineering, Indian Institute of Technology (Indian School of Mines), Dhanbad, Jharkhand, India. Her research interest includes power system optimization and renewable energy [email protected]

Vivekananda Mukherjee received the graduation degree in electrical engineering and the post-graduation degree in Power System from B. E. College, Shibpur, Howrah, India and B. E. College (Deemed University), Shibpur, Howrah, India, respectively. He received the PhD degree from NIT, Durgapur, India. Presently, he is an Associate Professor in the Department of Electrical Engineering, Indian Institute of Technology (Indian School of Mines), Dhanbad, Jharkhand, India. His research interest includes the application of soft computing intelligence techniques to various aspects of power systems.E-mail: [email protected]

Gitanjali Mehta received her B. Tech degree from IET, Bareilly, M. Tech degree in Power Electronics and ASIC Design from MNNIT Allahabad and Ph.D. degree from Department of Electrical Engineering, Indian Institute of Technology, Roorkee. Presently, she is working as Associate Professor in the Power Electronics Division of School of Electrical, Electronics and Communication Engineering, Galgotias University, G. Noida. Her research interests include Power Electronics and applications in Power Systems, Renewable Energy Technologies, Grid-integration of Distributed Energy Resources, Active Power Filters etc.E-Mail: [email protected]