Abstract
A thyristor-controlled series compensator (TCSC) can stabilize a power system by controlling line impedance. In the future, it is expected to provide a scheme for dealing with stability problems. However, detailed reports about experimental behavior and hardware design of the TCSC are lacking regarding such fundamental points in practical use. Therefore, first, various TCSC hardware specifications are studied and a 500kVar class TCSC prototype is developed from the viewpoint of adopting the TCSC in trunk power systems. Its current rating is 500 Arms, which is about one-tenth the maximum current of the TCSC designing studies.
This paper deals with the necessary hard components for the TCSC, and in particular, specifications of the series capacitor, the configuration of the thyrister stack and the design of the protection-controlled units. Furthermore, the effectiveness of the thyristor control is evaluated by experiments. The TCSC is shown to be a useful power flow control device for large, high power transmission systems.
