A Pilot Study of a Novel TCSC Scheme for the UHV Transmission Lines

To solve the problem that the existing thyristor valves may not meet the requirements of the UHV TCSC, a new TCSC is proposed in this paper. The novel TCSC consists of a capacitor and two parallel branches of thyristor controlled reactor (TCR). Obviously, the current over the whole controlled branch is shared by two parallel TCR branches. In the paper, the steady-state mathematical model is derived, and the control strategy is also discussed. The results of the digital simulation verify that the new TCSC model can satisfy the engineering application.