Oscillatory interaction between synchronous generator and local voltage-dependent load

The paper explores the influence of a voltage-dependent local load on electromechanical oscillations of a synchronous generator. The analysis is performed with different generator models, both with and without control devices. The classical static-load models were used as well as a generic model of dynamic load. It is shown that a voltage-dependent load can influence the damping of the electromechanical oscillations and thus the overall stability of the generator. This influence is very dependent on load parameters and on the generator's parameters and operating conditions. It is also shown that the use of dynamic-load models instead of static can have a significant influence on the evaluation of the total effect that voltage-dependent loads have on electromechanical oscillations of the generator.