A Novel Data Acquisition Equipment for Distribution Systems Based on FFT Single-peak Interpolation Algorithm

In recent years, internet of things(IoT) development has brought new vitality to modernizing power grid equipment. In the smart IoT era, collecting distribution equipment data has also become intelligent. However, existing acquisition devices often have fixed functions, making them unable to accommodate diverse sensors. This paper develops a multifunctional acquisition device based on fast fourier transform(FFT) single-peak interpolation to enable dynamic port configuration. This allows effective collection of pressure, temperature, current, voltage, and other sensory data from distribution equipment. The device also enables real-time grid voltage harmonic calculation. Field testing showed the device maintained stability with good data upload rates under multiple sensor connections. The harmonic calculation accuracy met requirements, with an average 0.001% relative frequency error, 0.13% relative amplitude error, and 0.25° angular error.