Abstract
This paper presents a Lorentzian adaptive filter (LAF) based solar photovoltaic (PV) system. An incremental conductance (INC) method is utilized to generate gating pulses for a boost converter, for receiving maximum solar power under fluctuating environmental conditions. It feeds PV array power to a grid interfaced voltage source converter (VSC). The developed PV system is multifunctional, having the capabilities of harmonics reduction, balancing of the grid currents, and power factor correction, along with injecting sinusoidal currents into the grid, with total harmonics distortion levels satisfying the IEEE 519 standard. The LAF algorithm rejects the undesirable effect of impulsive disturbances arising either in the load current or the current sensors, thus providing an enhanced filtering performance over the least mean square (LMS) based techniques. The system is evaluated experimentally under abnormal conditions such as sudden changes in irradiance, abrupt load unbalancing, and grid voltage swell.
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