3.3 Comparative Metrics for Evaluating Congestion Relief Efficiency
Evaluating the systemic performance of solar-plus-storage integration within post-reform transmission networks requires a multi-criteria methodological framework that reconciles physical power flow dynamics with institutional flexibility mechanisms. To evaluate transmission congestion relief systematically, this methodology adopts analytical indices that quantify how energy storage deployment mitigates line overload conditions and relieves structural bottlenecks across high-voltage networks (Energy Storage for Relief of Transmission Congestion, 2014). This analytical framing incorporates established operational approaches for evaluating congestion management across unbundled electricity grids, enabling the comparative assessment of transmission capacity allocation, redispatch procedures, and physical network limitations (Evaluating Congestion Management in the Dutch Electricity Transmission Grid, 2012). Furthermore, the methodological structure integrates digital energy service architectures to evaluate how renewable generation and co-located storage resources interact with distribution and transmission system operators through market-based flexibility coordination platforms (FLEXGRID – A Novel Smart Grid Architecture That Facilitates High-RES Penetration Through Innovative Flexibility Markets Towards Efficient Stakeholder Interaction, 2023). In addition, integrating techno-economic evaluation protocols allows for the structured assessment of storage flexibility under network constraints (Reimagining Grid Flexibility in a Constrained Power System: A Techno-Economic Evaluation of Battery Storage, Coal Performance, and Transmission Bottlenecks in South Africa, 2026). By coupling physical network congestion metrics with multi-stakeholder market operational frameworks, this comparative methodology establishes a robust protocol for evaluating grid modernization pathways across reformed power systems.