Synchrophasors for load modelling in Australia

The inherent low noise of PMU measurements means that small variations in a power system can reliably indicate aspects of system performance. This factor combined with the continual customer load variation and its randomness properties permits the identification of system dynamics. The same variation combined with an understanding of the key parameters of load dynamics opens the possibilities of on-line load dynamic identification. Even though the normal variations in voltages and frequencies are small, this paper summarizes how the key properties of PMU signals open a new field of power system identification. Results are given for both synthetic data and real data from the power system.