Power optimisation of small scale SPV array using field programmable reconfiguration topology for dynamic non-uniform illumination state

Abstract

The power output of the solar-photovoltaic (SPV) array is affected significantly by non-uniformly incident solar radiation. Such non-uniform illumination (NUI) condition(s) occur due to shadows of terrestrial structures (like buildings, trees, etc.) or through the creation of hotspot(s) in the contribution of moisture-dust accumulation, bird droppings, etc. which are predictable in nature. Furthermore, projected images of cloud(s) also cause NUI impact which is unpredictable and is/are subject to variables such as 3-D cloud coverage, cloud density, wind speed, etc. Literature also affirms that SPV array architecture plays a critical role in NUI effect mitigation. The novelty of this paper is the introduction of switching network system with the flexibility in the arrangement of the SPV panel series–parallel connections as per solar light intensity, NUI pattern, and data obtained from panel's peripheral light sensors. The field programmable reconfiguration strategy proposed here will get the power vs voltage curve and current vs voltage curve to identify maximum power-point. Multiple NUI patterns are simulated in MATLAB with variance in SPV array matrix and peripheral sensor matrix. This proposed reconfiguration method is cost-effective and includes embedded devices that could be widely implemented for domestic as well as commercial applications with the nested sub-array scheme.

Keywords

• maximum power point trackers
• solar power
• solar cell arrays
• switching networks
• optical sensors
• 3d cloud coverage
• switching network system
• panel peripheral light sensors
• field programmable reconfiguration method
• maximum power-point identification
• matlab
• embedded devices
• dynamic nonuniform illumination state
• small scale spv array
• nested sub-array scheme
• peripheral sensor matrix
• spv array matrix
• multiple nui patterns
• voltage curve
• field programmable reconfiguration strategy
• nui pattern
• solar light intensity
• spv panel series–parallel connections
• nui effect mitigation
• spv array architecture
• cloud density
• nui impact
• bird droppings
• moisture-dust accumulation
• terrestrial structures
• nonuniform illumination condition
• nonuniformly incident solar radiation
• solar-photovoltaic array
• power output
• field programmable reconfiguration topology
• power optimisation