Enhancing the Functionality of a Grid-Connected Photovoltaic System in a Distant Egyptian Region Using an Optimized Dynamic Voltage Restorer: Application of Artificial Rabbits Optimization.

Photovoltaic (PV) systems are crucial to the production of electricity for a newly established community in Egypt, especially in grid-tied systems. Power quality (PQ) issues appear as a result of PV connection with the power grid (PG). PQ problems cause the PG to experience faults and harmonics, which affect consumers.

Reduced graphene/nanostructured cobalt oxide nanocomposite for enhanced electrochemical performance of supercapacitor applications.

We demonstrate the preparation of nanostructures cobalt oxide/reduced graphene oxide (CoO/rGO) nanocomposites by a simple one-step cost-effective hydrothermal technique for possible electrode materials in supercapacitor application. The X-ray diffraction patterns were employed to confirm the nanocomposite crystal system of CoO/rGO by demonstrating the existence of normal cubic spinel structure of CoO in the matrix of CoO/rGO nanocomposite. FTIR and FT-Raman studies manifested the structural behaviour and quality of prepared CoO/rGO nanocomposite.