电阻型超导限流器失超电阻测量方法

针对安装于高压柔性直流电网中的电阻型超导限流器的失超电阻难以测量的问题,提出一种适用于高电压等级下超导限流器的失超电阻间接计算方法。该方法利用超导限流器样机失超电阻易于测量、对试验环境要求相对较低的特点,通过超导限流器失超电阻和其常温电阻之间存在的比例关系,基于热等效原理对超导限流器样机进行交流冲击试验,进而获得样机的失超电阻值;最后通过推算得到了超导限流器的失超电阻值。通过与仿真模型仿真值的对比证明了计算结果的准确性。

Measurement Method of Quench Resistance of Resistive Superconducting Fault Current Limiter

To measure the quench resistance of the resistive-type superconducting fault current limiter(SFCL) installed in the high voltage DC grid, an indirect calculation method of the quench resistance for the superconducting fault current limiter under high voltage level is proposed. The method makes use of the characteristics that the quench resistance of the SFCL prototype test is easy to be measured and relatively low requirement for test environment. Based on proportional relationship between the quench resistance of the SFCL and its room temperature resistance, as well as the principle of thermal equivalent, an AC current impulse test of the SFCL is carried out, and the quench resistance of the prototype is obtained. Finally, the quench resistance of the SFCL is obtained by calculation. The comparison between the calculation results and the simulation results proves the accuracy of the proposed method.