As a new-type reactive compensation device,magnetically controlled reactor(MCR)has the simple manufacturing process,low cost,and high reliability.However,due to the lower response speed of MCR,its application is largely limited.Aiming at this problem,the method of using charging capacitor to discharge was introduced to improve the response speed.Firstly,based on this method,the fast response circuit topology and mathematic model are given,and the value range of the capacitor is derived.Secondly,the simulation analysis is conducted by MATLAB.In the end,the simulation results are verified by experiments.The results show that this improving response speed method can limit the response time in 0.02 s.%针对磁阀可控电抗器（MCR）响应速度慢的问题，介绍了一种利用充电电容放电提高其响应速度的方法。给出了快速响应电路的拓扑结构，建立了数学模型，推导出电容取值范围；进行了 Matlab 仿真分析和试验验证。仿真和试验结果表明，快速响应方法可以使 MCR 的响应时间在20 ms 以内。
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