Analysis of load impact on small-signal stability based on load active power sensitivity

While load flow conditions vary with different loads, the small-signal stability of the entire system is closely related with the locations, capacities and models of loads. In this paper, load impacts with different capacities and models on the small-signal stability are analysed. In the real large-scale power system case, the load sensitivity which denotes the sensitivity of the eigenvalue with respect to the load active power is introduced and applied to rank the loads. The loads with high sensitivity are also considered.