Loss of Grid Behavior for a Grid Forming ESS Inverter

The growing integration of renewable energy sources into the power grid poses both opportunities and challenges, especially to grid stability and reliability. The grid forming inverter ensures that load experiences no interruption in power supply in event of absence of utility. This paper investigates the performance of a grid-forming energy storage system inverter rated at 700kW during loss of grid. The study is driven by the need to understand how these systems can contribute to a stable grid in the face of increasing reliance on distributed energy resources. Various test cases are considered focusing on different load parameters to investigate inverter's response under diverse operating conditions. Using a Controller Hardware-in-the-loop (HIL) simulation environment, inverter is tested for loss of grid for different loads and different voltage/reactive power droop settings.