Fault current limiting device

Abstract

The embodiment of the invention provides a fault current limiting device and relates to the field of high-voltage electrical apparatuses. The operation loss can be reduced. According to the specific scheme, the fault current limiting device comprises k current limiting units, a fuse and two terminals, wherein k is greater than or equal to 1; the k current limiting units are connected in series and then connected with the fuse in parallel; the two terminals are led out from two ends of the fuse; and each current limiting unit comprises a current limiting impedor and a high-speed vacuum switch which are connected in parallel. The fault current limiting device is used for inhibiting short circuit current.

Description

technical field [0001] Embodiments of the present invention relate to the field of high-voltage electrical appliances, and in particular to a fault current limiting device. Background technique [0002] With the development of the national economy, the power system is also developing rapidly. With the rapid increase of power consumption, the level of short-circuit current also soars, exceeding the breaking capacity of the circuit breaker, making the suppression of short-circuit current an urgent problem to be solved at present. The fault current limiter can reduce the peak value of the fault current, reduce the breaking burden of the circuit breaker, and improve the transmission capacity of the line. It is a more feasible solution to suppress the short-circuit current. [0003] Current fault current limiters include power electronic type fault current limiters. Power electronic current limiters mainly include solid-state current limiters and resonant current limiters. The...

AI Technical Summary

Problems solved by technology

The advantage of the solid-state current limiter is that it can be controlled quickly and flexibly, but at present, the cost is relatively high, the volume is large, and in the high-power system, the energy consumption is also large; the resonant current limiter can quickly limit the short-circuit current, and it can It plays the role of series compensation, but the power loss of the reactor is relatively large, and the operation and maintenance cost is high

Therefore, the current fault current limiter has the problem of large loss during normal operation.

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