A Dual Control for DFIG/DC-microgrid Hybrid Power System Employing SMES-based Unified Power Quality Conditioner

In order to protect and smooth the power of DFIG/DC-microgrid hybrid power system, this paper proposes a dual control for regulating the positive and negative sequence components of voltage signals employing SMES-based unified power quality conditioner (UPQC). For a case verification, a 0.8H/718A superconducting coil (SC) is designed and used in simulation to verify the effectiveness of the protection function in UPQC. The proposed control strategy has excellent performance, and the oscillations of each crucial parameter can be well-suppressed.