Interlinking Converter Operation with Enhanced Hybrid and Inverse Q–V Droop

This paper introduces an enhanced hybrid and inverse Q−V droop control for the interlinking converter (ILC) in a hybrid microgrid (HMG). A hierarchical control approach is utilized to control the HMG. The primary control for both AC and DC sections employs the virtual synchronous generator (VSG) concept to provide inertia support, thereby improving the rate of change of frequency (ROCOF) and voltage (ROCOV). Secondary control employs a centralized method to restore the frequency and voltages of the PCC bus in both sections. The proposed control incorporates an integrator in the hybrid and inverse Q−V droop control for effective power balancing between the AC and DC sections. Simulation studies demonstrate that the proposed control outperforms traditional methods in maintaining power balance under both primary and secondary control, exhibiting superior performance and capability.