Grid Modernization in the Era of Inverter-Based Resources: Stability, Protection, and Control Perspectives

The fast penetration of inverter interface energy resources (IIERs), such as solar PV, wind power and battery ES, is changing fundamentally the structure of modern power systems. Although these devices allow for decarbonization and power system flexibility, they lead to important issues in terms of reduced inertia, weakening of the systems’ strength, changing fault characteristics, or interactions control problems. Conventional grid topologies and protection/control are designed for synchronous machine systems and more ill-suited to this new mode of operation. This paper investigates grid modernization in the context of stability, protection, and control of IBR-plagued grids. It provides a systematic integration of emerging challenges for the full range of time scales, reports recent control and protection schemes as well as technology developments, and discusses validation and deployment aspects. This paper emphasizes the importance of coordinated grid-forming control, adaptive protection, and planning by the entity responsible for system operation in guaranteeing reliable resilient secure operation of power systems.