高温超导储能变流器的LC阻尼滤波器设计

为了抑制高温超导储能电压型变流器的输出电压谐波,设计了带阻尼效应的LC低通滤波器。文中分析了滤波器的原理及传递特性,进行了正弦脉宽调制波的谐波分析,通过控制滤波网络的基波衰减因数确定了LC阻尼滤波器的参数,最后将其应用于高温超导SMES的电压跌落补偿试验。试验结果表明,LC阻尼滤波器在SMES变流器系统中能起到良好的滤波效果,提高了SMES系统的动态响应能力和稳态性能。

Design of damped LC filter for HT-SMES converter

To suppress the output voltage harmonics of the high-temperature superconducting magnetic energy storage system with voltage source converter, the damped LC low-pass filter of the SMES converter was designed. In this paper, the principles and the transmission characteristics of the LC filter were described, and the SPWM wave of the SMES converter was analyzed. By controlling the fundamental voltage decay of the filter, the parameters of the filter circuit were determined. At last, the damped LC filter was applied in the experiment of voltage compensation by using SMES. Experiment results show that the LC filter has gained favorable filtering effect in the SMES converter and improves the dynamic response and the steady-state performance of the SMES system.