Simulink-Based Siemens Standard 400V Low-Voltage Feeder Model with PV Grid Integration

This document presents a Simulink-based implementation of Siemens' standard 400V low-voltage feeder model, featuring an integrated PV grid-connected system. The model is designed for simulating and analyzing the performance characteristics of low-voltage feeder networks. Through Simulink's modular programming environment, users can dynamically adjust system parameters and operating conditions using block-based components and MATLAB scripting interfaces to optimize feeder system operations. The model incorporates critical factors affecting PV grid integration, including solar irradiation patterns, temperature variations, and inverter efficiency curves, all implemented through customizable lookup tables and mathematical function blocks. The simulation framework utilizes power system analysis algorithms to calculate power flow distribution, voltage regulation, and protection coordination. Key functional blocks include maximum power point tracking (MPPT) controllers for PV optimization, three-phase inverter models with PWM modulation, and protective relay coordination logic. By leveraging Simulink's simulation capabilities, engineers can investigate PV system performance under varying operational scenarios, assessing reliability metrics through parameter sweep studies and Monte Carlo simulations. The model provides valuable insights for system optimization, fault analysis, and integration planning, serving as a reference platform for practical implementation improvements and grid compatibility studies.