Transient Stability of Droop-Controlled Inverter Networks With Operating Constraints

Due to the rise of distributed energy resources, control networks grid-forming inverters is now a pressing issue for power system operation. Droop popular strategy in literature frequency these inverters. In this article, we analyze transient stability droop-controlled inverter that are subject multiple operating constraints. Using physically meaningful Lyapunov-like function, provide two sets criteria (one mathematical and one computational) certify postfault trajectory achieves synchronization while respecting We show how obtain less-conservative conditions by incorporating information from loop flows, i.e., net flows active around cycles network. Finally, use quantify scale parameter disturbances which network robust. illustrate our results with numerical case studies IEEE 24-bus system.