A Study on IEEE 9 Bus for Fault Response Analysis of Distribution Networks with Inverter-Based Resources Using ATP/ATP Draw Simulations and Grid-Following Inverters

Power System Electromagnetic Transient (EMT) simulation is crucial for designing and evaluating power system control systems. It helps researchers optimize control strategie ^s and assess their effectiveness under different conditions. This paper introduces a detailed model of a 4 MW grid-following inverter PV model for verifying the response to faults and the overcurrent protection scheme. The grid-following inverter with Dynamic Reactive Control (DRC) is compared to a simplified fault response model. The study analyzes the impact of DRC current limiting model on protection blinding under different irradiance conditions. It highlights the significance of detailed PV inverter modeling in identifying and predicting DN blinding scenarios. The transient simulations are conducted on the IEEE 9-bus system with a 4 MW PV power plant in different scenarios. This provides a more comprehensive assessment and analysis of Inverter-Based Resources (IBRs) modeling and transient simulation.