600kJ high temperature SMES-based sag compensator

This paper introduces the voltage sag compensator with a new type of energy storage element. As an energy storage element, superconducting magnetic energy storage (SMES), which is consisted of Bi-2212 conductor and has an energy storage capacity of 600 kJ, is used to mitigate instantaneous voltage drops in distribution networks connected to several crucial loads. System descriptions on the power circuit topology of the voltage sag compensator and its control method are made. And several simulation results are also presented to verify the validity of the presented voltage sag compensator. And, several scale-down experimental works to achieve the experimental verifications are included.