Real-life case of Routable-GOOSE over MPLS-TP: Implementation, Testing and Validation at Tele-protection Santa Rosa-Carapongo 220 kV line in Perú

IEC 61850-8-1 Edition 2.1 and IEC TR 61850-90-5, enables the extension of high-speed protection, automation, and control signals beyond the substation local area network to support wide-area protection, automation, and control (WAMPAC) applications. By leveraging IP/UDP multicast communication at Layer 3, R-GOOSE overcomes the inherent limitations of conventional Layer 2 GOOSE and enables reliable inter-substation exchange of time-critical binary signals.

This paper presents the first field implementation, testing, and validation of an

R-GOOSE-based teleprotection scheme in South America. The solution was applied to the 220 kV Santa Rosa–Carapongo overhead transmission line in Peru, replacing a legacy power line carrier (PLC) teleprotection channel with an R-GOOSE communication architecture deployed over an MPLS-TP wide-area network. Cybersecurity was ensured through IPSec/GRE tunnelling.

The proposed architecture was evaluated under real operating conditions for permissive and direct inter-trip protection schemes. An end-to-end testing methodology was implemented to assess transfer time, latency, and jitter performance under multiple fault scenarios along the transmission line. Function Time and total Transfer Time were measured using synchronised network analysers and relay-based signalling, enabling a direct comparison between the

R-GOOSE/MPLS-TP solution and the existing PLC-based teleprotection.

Experimental results demonstrate that the R-GOOSE-based solution consistently outperforms the PLC channel, achieving faster signal reception by up to 24.3 ms for distance protection

(ANSI 21) and 18.6 ms for directional earth-fault protection (ANSI 67N). Average end-to-end transfer times of 5.6 ms and 6.6 ms were achieved, complying with IEC 61850 performance class P2 and the TT5 transfer time requirement (≤ 10 ms), as well as permissive teleprotection requirements defined in IEC 60834-1.

These results confirm that R-GOOSE over MPLS-TP provides a deterministic, low-latency, and reliable communication platform suitable for critical inter-substation protection applications. The successful deployment in a real transmission system validates R-GOOSE as a technically robust and operationally viable alternative to legacy teleprotection technologies, supporting the digitalisation and decarbonisation objectives of modern power grids. This paper extends previous preliminary publications by providing a standard-based performance and operational assessment under real operating conditions.