A Multi-Functional Grid-Tied PV System Using a Split Source Inverter With Energy Management and Power Quality Improvement Features

This paper presents the design and implementation of a multi‑functional grid‑connected (MFGC) photovoltaic (PV) system based on a split‑source inverter (SSI) to improve energy management and power quality. The SSI topology was chosen for its superior voltage‑boosting capability and reduced component count compared with conventional impedance‑source inverters (ZSIs). Unlike ZSIs, the SSI can operate as a full active power filter (APF), providing grid‑side reactive‑power compensation and harmonic suppression. A robust sliding‑mode control (SMC) scheme is developed to regulate both the DC and AC sides of the system. On the DC side, the SMC regulates the input current and adaptively adjusts the duty cycle to maintain optimal boosting. On the AC side, a decoupled SMC framework generates the reference voltages, which are then synthesized via a modified space‑vector modulation (MSVM) algorithm for precise inverter switching. The system supports multiple operating modes—including reactive‑power compensation, nonlinear‑load supply, and injection of excess PV power into the grid. MATLAB/Simulink 2024a simulations confirm that the proposed configuration delivers high power quality, efficient energy utilization, and stable grid interaction under dynamic solar irradiation and load variations.

Keywords:
Multi‑functional grid‑connected (MFGC)  Photovoltaic system (PVS) Sliding‑mode control (SMC)  Split‑source inverter (SSI) Active power filter (APF)