A fault current limiter (FCL) is extensively needed to suppress fault currents and is particularly required for trunk power system heavily connecting to high-voltage transmission lines, such as 5OOkV. lines which constitute the nucleus of the system.
In this paper, we have proposed a principle of a new FCL, consisting of solid-state diodes, a DC coil and a bypass AC coil. To evaluate the performance of this FCL, the Electromagnetic Transients Program (EMTP) analysis has heen executed on a model system. The stability of the new FCL connected with trunk power system is also analyzed by a power system simulator. These analyses show that the new FCL expectantly suppresses the fault current in the power system, without reducing its stability.
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