The control system of the ITER vertical stabilization converter

The paper describes the control system of the International Thermonuclear Experimental Reactor (ITER) vertical stabilization converter, which has been optimized so as to achieve the best performance in terms of response time. The converter four quadrant operation is first described, and the undesired current unbalance between the converter subunits, due to fast voltage transients is discussed; then the design criteria and the regulator structure are described. Finally, the simulation results of the complete circuit operation in the worst conditions are reported, to evaluate the converter performances.