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.