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This paper presents an active power control by a dual-excited synchronous rotary condenser. A dual excited synchronous machine has two field windings (dand q-axis) which intersect perpendicularly each other. It is possible to adjust an active power by regulating each field voltages individually. The conven tional stabilizing facilities such as static condensers and synchronous rotary condensers improve the stability of main network systems by adjusting a reactive power. On the other hand, an application of the dual-excited synchronous machine to a rotary condenser can improve the stability more effectively. In this paper, to begin with, experimental results show that the dual-excited synchronous rotary condenser is effective in improving the transient stability subjected to a large disturbance in a single machine infinite bus power system. Next, some case of a single transmission line fault in a double transmission system is demonstrated by computer simulations. Simulation results show that the proposed facility yields good dynamic performance.

Experiments and Analyses of an Active Power Control using Dual-Excited Synchronous Rotary Condensers