Quantification of damping contribution from loads

A method to identify the effect of load dynamics on inter-machine oscillations is developed. This contributes to the main aim of finding the sensitivity of the oscillatory modes with respect to the presence of particular loads in a multi-machine power system. In this method the sensitivity is found by using the identified oscillatory frequencies of the inter-machine oscillations, the identified load model, and the right and left modal matrices. Simulation of a test power system, including three generators and nine buses, is used to validate the algorithm. This approach is applied to measurements of the inter-machine oscillations of the Australian network and sensitivity to one particular load is identified.