This program uses the open source rapid61850 project to listen to Sampled Value streams in real-time. Sampled Value data are put through measurement and analysis code which provides detailed information on the voltage and current fundamental magnitude and phase, harmonics, power flow, etc. Frequency analysis is done using a resampled DFT method, which is very efficient and offers low spectral leakage.
The voltage and current information is visualised using a Qt-based GUI. The program is designed to be lightweight, efficient, open source, and cross-platform.