Abstract

This study examines how renewable energy integration influences power flow in Morocco’s national transmission grid. A detailed high-voltage network model was developed in GridCal using open-source data, and hourly simulations were carried out for four generation scenarios: a fully conventional system, an 8 percent solar case, a 12 percent wind case, and a 20 percent mixed renewable configuration representative of 2022. Results indicate that renewable generation alters both the magnitude and variability of transmission flows. Wind integration increased southern-corridor transfers from about 55 to 83 megawatts, while solar effects remained localized near production zones. These findings show that electrical connectivity and dispatch interactions, rather than geographic proximity, determine which corridors are most affected. The study provides a high-resolution framework for identifying transmission bottlenecks and supports Morocco’s energy-transition planning by linking renewable scenarios with grid-reinforcement priorities.