R-GOOSE and its Impact on Meeting the Performance Requirements for Protection and Control in Networks Dominated by Unconventional Sources

(DERs), and variable renewable generation - has introduced new challenges for the protection and control of both transmission and distribution networks. Traditional protection schemes, which have been developed based on assumptions of stable short-circuit currents, unidirectional power flow, and centralized generation, are no longer sufficient to meet the fast and adaptive responses required in modern grids. In this context, new performance requirements for protection and control are emerging, focused on speed, selectivity, coordination, adaptability, and resilience to changing system conditions.

This paper introduces Routable GOOSE (R-GOOSE), a key enhancement of the IEC 61850 communication standard, as a critical enabler for meeting the stringent performance requirements of protection and control in this new environment. Unlike traditional GOOSE messages, which are confined to Layer 2 Ethernet multicast within a local area network

(LAN), R-GOOSE operates over Layer 3 using routable IP-based communication. This allows

GOOSE messages to be transmitted across subnets and geographic boundaries, enabling timecritical peer-to-peer messaging between intelligent electronic devices (IEDs) in different substations or distributed locations without the need for dedicated point-to-point links or proprietary protocols.

The paper examines the potential of R-GOOSE to enable advanced protection schemes in transmission networks, particularly for high-speed teleprotection functions such as permissive overreaching transfer trip (POTT), directional comparison blocking (DCB), and line differential protection. These schemes rely on reliable and ultra-low-latency communication of protection signals between relays located at opposite ends of transmission lines. R-GOOSE can replace legacy communication channels, such as pilot wires or microwave links, with standard-based IP networks, thereby enhancing interoperability, reducing infrastructure complexity, and improving scalability. In the distribution domain, R-GOOSE plays a central role in enabling modern protection and automation applications such as Fault Location, Isolation and Service Restoration (FLISR).

FLISR requires rapid and coordinated decision-making among multiple field devices, such as reclosers, sectionalizers, and smart switches. R-GOOSE supports deterministic delivery of control commands and status information across complex and often meshed distribution topologies, improving fault isolation times and accelerating service restoration. In microgrids and feeder segments with high DER penetration, the ability to reconfigure protection zones and control logic dynamically using R-GOOSE enhances reliability and supports advanced grid-forming capabilities.

The paper also discusses the underlying communication technologies required to support the deployment of R-GOOSE in protection and control systems. These include high-speed, deterministic IP-based networks with support for Quality of Service (QoS), multicast routing, virtual LANs (VLANs), and network redundancy mechanisms such as Parallel Redundancy

Protocol (PRP) and High-availability Seamless Redundancy (HSR). The suitability of different transport media—fiber optics, 5G, and private LTE—is evaluated in terms of latency, reliability, bandwidth, and cybersecurity.