Case study: Assessing the performance of MPLS hitless technology for teleprotection services

Modernizing utility networks demands a shift from older TDM systems to IP-based solutions, with MPLS emerging as a key technology for integrating distributed energy resources. This transition offers potential cost savings and enhanced performance, especially for critical teleprotection applications. However, strict adherence to regulations and security standards is essential to maintain stability during protective switching. A recent project at the PNDC focused on verifying the reliability and speed of teleprotection services over MPLS hitless technology. Using RTDS testing with a three-ended line differential protection scheme and 10G data network analysis to simulate diverse network conditions, various MPLS platforms were evaluated. The setup involved dual-CPU MPLS nodes supporting hitless technology across multiple interfaces. Measurements concentrated on communication latency, relay tripping times, and network stability. Ultimately, the project aimed to demonstrate the viability of MPLS for high-voltage teleprotection lines, ensuring robust and adaptable network path switching for critical power network operations.