Software for control and calibration of an inductive shunt on-line impedance analyzer

On-line impedance analysis allows impedances of devices and power lines to be determined for the optimum design of PLC systems. By measuring changes in impedance of devices such as transformers, motors or power lines, impending failures may also be detected. This paper discusses software for the control, signal processing and calibration of the Inductive Shunt On-Line Impedance Analyzer. The paper shows that the resulting combination of hardware and software results in accurate measurements of impedances over a wide frequency and impedance value range. Some on-line and off-line impedance measurements are presented.