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An Adaptive Control Scheme of SPV System Integrated to AC Distribution System

This paper presents a single-stage solar photovoltaic (SPV) system utilizing an adaptive control scheme. The SPV system includes SPV array, voltage source converter (VSC), ripple filter, nonlinear loads, and a distribution network. The proposed SPV system feeds the active power to the distribution system, provides an effective use of SPV array and mitigation of load harmonics currents. The SPV system with an incremental conductance based control scheme is used for obtaining the maximum power from the SPV array and an adaptive control scheme to control the switching pulses of the VSC. In addition, it utilizes a SPV feed-forward loop to improve the dynamic response and reduces the burden on the proportional-integral controller by regulating dc bus voltage. Test results are presented to validate the control, design, and response of SPV system with various states.