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In this paper, we propose a protection scheme using a superconducting fault current limiter (SFCL) for the power transmission system with Thyristor Controlled Series Capacitor (TCSC). TCSC can lead effectiveness such as power flow control, increase in transmission capacity, and improvement for system transient phenomena. But, because this has same effect to the reducing series impedances in transmission system, there are serious problem such as increase in fault current, transient stability deterioration and series voltage stress of TCSC in the transmission line. The proposed protection scheme using the SFCL into TCSC configuration can mitigate these problems. In addition, SFCL can be expected to protect the TCSC from a large transient current generated by lightning or switching surge in power transmission system. To verify the effect of the proposed protection scheme, PSCAD/EMTDC is used. From simulation result, we had good results for fault current limitation and insulating protection of TCSC. [ABSTRACT FROM AUTHOR]

Abstract: BaSm2Ti4O12 (BST) film grown at room temperature was amorphous, while the film grown at 300°C was also amorphous but contained a small amount of crystalline Sm2Ti2O7 (ST). The crystalline BST phase was formed when the film was grown at 700°C and subjected to rapid thermal annealing (RTA) at 900°C. On the other hand, the ST phase was formed in the film grown at 300°C and subjected to RTA at 900°C. A high capacitance density of 2.12fF/μm2 and a low leakage current density of 1.15fA/pFV were obtained from the 150nm-thick BST film grown at 300°C. Its capacitance density could conceivably be further increased by decreasing the thickness of the film. It had linear and quadratic coefficients of capacitance of −785ppm/V and 5.8ppm/V2 at 100kHz, respectively. Its temperature coefficient of capacitance was also low, being approximately 255ppm/°C at 100kHz. [Copyright &y& Elsevier]