Hardware-in-the-Loop Simulation for Superconducting DC Power Transmission System

When ac power is converted to dc power, the thyristor converter generates a harmonic component, creating problems that cannot be bypassed by both the ac and dc sides. This may result in ripple current in dc power transmission system and become a major problem for the current sourced HVDC transmission systems. The effects of the harmonics require serious consideration when applying an HTS dc power cable to an high voltage direct current (HVDC) system. The effect of harmonics on the HTS dc power cable was clarified by manufacturing a small scale thyristor converter system and miniaturized HTS dc power cable. This paper presents real-time simulation methods for the transient analysis of a superconducting dc transmission system. An HTS dc power cable system was analyzed using Hardware-in-the-loop simulation (HILS). This research mainly focuses on investigation of the stability of a superconducting dc cable system under a steady state and transient condition. The operating characteristics of the Jeju power system with a superconducting dc cable system are described in detail.