Power quality monitoring and analysis of the domestic grids - A case study

This paper presents the analysis of real time power quality data collected for 50 days at a domestic site in India. The data is collected using a dedicated PQ analyzer. The measurement and analysis are performed to identify the level of different grid disturbances and compared with relevant standards. Voltage unbalance and individual voltage harmonics are observed to be the major disturbances. In addition, the analysis of different kinds of loads, including new technology loads, present at the house is performed by recording the current waveforms drawn by these loads. The incoming supply voltage and current of the neighbouring houses are also recorded. An aggregate load model is presented based on the measurements performed at different houses connected to the same feeder.