TCC (Thyristor Control Series Compensations)

A Series Compensation scheme involving Thyristor Control allows for rapid dynamic modulation of the inserted reactance. At interconnecting points between transmission grids, this modulation will provide strong damping torque on inter-area electromechanical oscillations. Therefore, a TCSC rated at some 100 Mvar can make it possible to interconnect grids housing many thousands of MW´s of generating capacity. Often the TCSC is here combined with fixed series compensation in order to increase the transient stability in the most cost effective way.

The TCSC concept also comes with inherent immunity against Sub synchronous Resonance (SSR), and thus allows for extended use of series capacitor in specific transmission grids comprising thermal generation.