Islanding Effect Simulation Detection Model for Photovoltaic Grid-Connected Power Generation Systems

The Islanding Effect Simulation Detection Model for Photovoltaic Grid-Connected Power Generation Systems is a specialized model designed to detect islanding phenomena in solar power integration systems. This model utilizes photovoltaic generation technology and employs grid-connection simulation methodologies to identify potential islanding occurrences after system interconnection. Islanding effect refers to a situation where the power generation system, after being connected to the grid, becomes isolated due to grid faults or other disruptions, forming an independent "island" within the generation system that can lead to grid malfunctions. The model implementation typically involves real-time monitoring algorithms that track voltage and frequency parameters at the point of common coupling (PCC). Key detection functions include active frequency drift (AFD) methods, phase-locked loop (PLL) synchronization checks, and impedance measurement techniques. The simulation component uses MATLAB/Simulink environments to model inverter behavior and grid interface dynamics, incorporating over/under voltage protection (OVP/UVP) and over/under frequency protection (OFP/UFP) relay logic. Detection of islanding effects in photovoltaic grid-connected systems significantly enhances grid interconnection reliability and operational safety. The model's algorithm-based approach ensures early identification of isolation events, preventing potential damage to grid infrastructure and maintaining stable power system operation through automatic disconnection mechanisms when abnormal conditions are detected.