Survey of the Secondary Voltage Control in France : Present Realization and Investigations

The voltage control of the french power system is organized in three hierarchical levels, which concern distinct geographical areas and time constants. The rapid and random variations are compensated by local primary and automatic actions on the generators A.V.Rs, then the slow variations are regulated by the secondary (at regional level) and tertiary (at national level) actions. The paper gives a review of the present regional secondary voltage control, and the prospects for the evolution towards a co-ordinated system, based on a sensitivity matrix model, closed-loop pole assignment and adaptive techniques. Analog and digital simulations are presented.