Design and Performance Analysis of PV-SMES-Based Microgrid Integrated With Power Fluctuation Suppression and Active Filtering Control

This paper proposes to integrate power fluctuation suppression and active filtering control into the centralized photovoltaic (PV) inverter based on superconducting magnetic energy storage (SMES). The superconducting coil (SC) is interfaced to the DC-link of the PV inverter through a DC/DC converter. The PV-SMES-based system performs the dual demands of transferring maximum power from PV array apart from suppressing power fluctuations and harmonics existing in microgrid. An improved sliding mode controller (SMC) was developed for the DC/DC converter to stabilize the DC-link voltage of PV inverter. The stability of the proposed controller is demonstrated using Lyapunov stability theory. The comprehensive performance of the PV-SMES-based system is verified through a series of simulation comparisons based on a lead-acid battery scheme.