Noise Canceling-FPPT for PV Systems Under Fluctuating Irradiance Conditions

The Flexible Power Point Tracking (FPPT) algorithm is vital in managing the active power output of grid-connected photovoltaic (PV) systems to align with grid require-ments. However, conventional FPPT algorithms encounter chal-lenges with tracking misjudgments under fluctuating irradiance conditions. To enhance control of photovoltaic systems in such fluctuating environments, this paper proposes a novel Noise-Canceling FPPT (NC-FPPT) algorithm. The proposed algorithm distinguishes itself by its ability to extract the noise component within real-time irradiance measurements, accurately estimate the resultant PV power changes due to irradiance noise, and apply a power bias to cancel out noise-induced power changes, thereby minimizing the risk of misjudgment of flexible power points. Through experimental validation, the NC-FPPT algorithm has been shown to decrease the tracking error by up to 8.12 % and maintains power closer to ideal reference when compared to traditional FPPT algorithm.