PL417462A1 - Method and the device for identification of electrical energy receivers - Google Patents

Abstract

The method consists in measuring the current and voltage signals (i (t), u (t)) of the LV power supply, and after sampling these signals in the systems of analog-to-digital converters (3, 4), the digital signals are grouped into two vectors samples (i (n), u (n)) mapping these signals in the time domain, and the obtained sample vectors (i (n), u (n)) are transformed in the FFT processing blocks of signals (5, 6) into two discrete ones, complex spectrum signals of both current and voltage signals (IRE, URE) for the fundamental frequency and subsequent harmonics. These spectrum signals are transformed in the impedance and / or complex admittance calculation block (7) into complex impedance and / or admittance values (Z (n * fn), Y (n * fn)) for the fundamental frequency and subsequent harmonics, characterizing individual receivers . On this basis, the activation / deactivation status of individual receivers is identified. The device for identifying electricity consumers includes a current measurement module (1) and a voltage measurement module (2), whose inputs are connected to the mains terminals and the input terminal of the receiving network. Current measurement module output (1) and voltage measurement output (2) are connected via an analog-to-digital converter (3, 4) and then FFT signal processing block (5, 6) with impedance and / or complex admittance calculation block (7).