Fast adaptive control against voltage instability

Adaptive coordinated voltage control provides coordination of various devices within a wide area and adapts to the changing dynamics of power systems subjected to a series of faults. A new adaptive control is proposed for coordinated voltage control in this paper. The off-line training and on-line learning is used to acquire system knowledge. Accompanied by the system knowledge stored in a long-term memory, the on-line search and flexible control can perform a fast and effective control to prevent voltage instabilities. The simulation results for the IEEE 39 bus and 145 bus systems shows its efficiency. The comparison between controls of these two systems proves that the reduced solution space is not necessarily increased with the system scale.