Research on Fast Current Limiting Technology Based on Current Commutation of High Speed Switch

At present, the electric power industry is developing rapidly. The installed capacity of each power plant is expanding, and the capacity of short circuit current is also growing rapidly. The traditional current limiter is not only difficult to break the large capacity of short circuit current. Before breaking off may have caused damage to the power equipment, causing huge economic losses. At present, in order to meet the demand of the market of our country, research and development of a new practical current limiter which can limit high capacity fault short circuit current is imperative. Besides will bring benefits to power plants and substations of the power industry, it can also be used in large power supply sets of equipment related in chemical industry, metallurgy, ship and nuclear fusion test unit etc. It has great research and development prospect and market. This paper studies a parallel transfer type of large capacity short-circuit fault limiter. The innovation point is to introduce the fast repulsive force into the current limiter. The mechanism fast repulsive force mechanism moves quickly, and the effect is very obvious when it is applied to the large capacity fault current limiter.