Enhanced review on dynamic real-time digital simulation analysis of renewable energy integration using state space model

The modernization of electric power grids, driven by communication and 
electronic hardware advances alongside increasing renewable energy 
integration, introduces challenges like voltage fluctuations, weakened 
protection, and transient instability. High renewable penetration can trigger 
reverse power flow and voltage rise, complicating system control. Real-time 
digital simulations offer a non-destructive approach to analyze and optimize 
power system behavior under diverse conditions. Using platforms like 
Simulink Real-Time and RT-LAB with OPAL-RT, detailed studies of 
protection relays, circuit breakers, and control algorithms are efficiently 
conducted. This paper reviews real-time digital simulation techniques for 
renewable-integrated power systems, emphasizing state-space modeling for 
capturing system dynamics. Recent developments in predictive and event
based control strategies to enhance microgrid stability and operational 
efficiency are examined. Simulations of a three-bus system with transient 
analysis and event-based predictive control for energy management are 
discussed, demonstrating how real-time simulation platforms support 
renewable energy integration while maintaining grid stability.