Statistical analysis of load behavior parameters at four major loads

This paper describes field experience with a measurement system, which has been used to monitor the load behavior of four major loads at 230 kV level during the last 3 years. A statistical analysis of static load model parameters, estimated from 2768 snap shots of voltage perturbations is presented. Most of the perturbations are between 1% and 4%. However, 22 perturbations with voltage variations exceeding 20% have been recorded. >