Feasibility Analysis of SMES-Based Interline DC Dynamic Voltage Restorer

In order to reduce the energy storage cost under multiple-line distributions, this paper investigates a new interline DC dynamic voltage restorer (IDC-DVR) scheme with one superconducting coil shared among multiple compensating circuits. An improved DVR chopper assembly is used to connect the single coil with multiple power lines, and thus to satisfy with independent energy exchange requirement of any line to be compensated. The feasibility of the proposed scheme is technically verified to maintain the transient voltage stability in multiple-line voltage swell and sag cases.