Power system and its current limiting device

Abstract

The invention discloses a power system and a current limiting device thereof. The current limiting device comprises a reactor with an inlet terminal and an outlet terminal. The reactor comprises a first winding and a second winding in parallel, and the first winding and the second winding are connected in series with the inlet terminal and the outlet terminal. A first quick switch connected in series between the incoming terminal and the first winding, the operating mechanism of the first quick switch being disposed close to the ground; A first cable protection member for protecting the cablebetween the first fast switch and the first winding and the incoming terminal; A second fast switch connected in series between the outlet terminal and the first winding, the operating mechanism of the second fast switch being disposed close to the ground; A second cable protection member for protecting the cable between the second fast switch and the first winding and outgoing terminal. The structure design of the current limiting device can effectively solve the problem that the mechanical switch type current limiting device is difficult to operate and maintain.

Description

technical field [0001] The invention relates to the field of electric power technology, and more specifically, relates to an electric power system and a current limiting device thereof. Background technique [0002] As the capacity of the power system continues to increase, the level of short-circuit current continues to increase. In some areas, the short-circuit current has exceeded the breaking capacity of existing circuit breakers. Excessive short-circuit current has become a serious threat to my country's Pearl River Delta, Yangtze River Delta, Beijing, Tianjin and Tangshan. A major issue in the safe and stable operation of the three major load center power grids. With the continuous expansion of the grid scale, the above problems are still intensified, and the fault current limiter is one of the important means to solve the above problems. [0003] As a device for limiting the short-circuit fault current, the current-limiting device can effectively limit the short-circu...

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Problems solved by technology

[0006] In view of this, the first object of the present invention is to provide a current limiting device, the structural design of the current limiting device can effectively solve the problem that the mechanical switch type current limiting device is difficult to operate and maintain, the second object of the present invention It is to provide a power system including the above-mentioned current limiting device

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