An Adaptive Fault Current Limiter

Abstract

The invention discloses an adaptive fault current limiter, comprising a superconducting fault current limiting resistor R connected in series between port 1 and port 2 SFCL and thyristor T1; the anode of thyristor T1 is connected to the superconducting fault current limiting resistor R SFCL , the cathode is connected to port 2; it also includes a coupled inductor, and the coupled inductor includes inductance windings L1 and L2 with mutual inductance; the inductance winding L2 is connected between port 1 and port 2 after the capacitor C is connected in series; the end of the inductance winding L2 with the same name is connected to port 1 , the opposite end is connected to one end of the capacitor C, and the other end of the capacitor C is connected to port 2; the inductance winding L1 is connected in series with the current limiting resistor R and then connected in parallel to both ends of the thyristor T1; the opposite end of the inductance winding L1 is connected to the anode of the thyristor T1, the same name connected to one end of the current-limiting resistor, and the other end of the current-limiting resistor is connected to the cathode of the thyristor T1; the on-state loss of the present invention is low, and the current-limiting resistor and inductance can be automatically connected in series in the circuit when a short-circuit fault occurs, which can effectively suppress and reduce short-circuit fault current.

Description

technical field [0001] The invention relates to the technical field of electrical equipment and electrical engineering, in particular to an adaptive fault current limiter. Background technique [0002] In recent years, with the country's emphasis on environmental protection and the gradual depletion of non-renewable energy such as coal and oil in the world, the country has increased the development and utilization of renewable clean energy. Clean energy projects such as offshore wind power generation in coastal areas and solar power generation in the west are being steadily constructed in China, and the best way for these distributed energy sources to carry out long-distance power transmission is high-voltage direct current transmission. However, due to the low line impedance of the DC transmission system, when a short-circuit fault occurs on the line, the fault current rises rapidly and has a high amplitude, so the design of the HVDC circuit breaker has become one of the ma...

AI Technical Summary

Problems solved by technology

[0004] The research on the DC fault current limiter is still in its infancy, the on-state loss of the fault current limiter, the cut-in problem of the fault current limiter when a short-circuit fault occurs, and the problem of its ability to limit the fault current have not been effectively solved and simultaneously take into account

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