July 2026 monthly summary for NREL-Sienna/PowerSystems.jl: Implemented API strictness for ramp limit calculation by removing the default base_conversion value and enforcing explicit parameter passing. This change eliminates ambiguous defaults, improves API clarity for downstream users, and reduces the risk of misconfiguration in production workflows. Tests were updated to cover explicit parameter usage, ensuring regression safety and higher confidence in behavior. The refactor aligns calculate_ramp_limit with calculate_gen_rating, enhancing consistency across the codebase and supporting more maintainable and predictable results for power systems analyses.

June 2026 monthly summary for NREL-Sienna/PowerSystems.jl focusing on ramp limit normalization and validation improvements in the PowerModels parser. Introduced a device-base aware base_conversion parameter to ensure ramp limits are scaled consistently across generator types (thermal and hydro) when MBASE ≠ 100. Implemented and propagated base_conversion across core data construction paths (make_hydro_dispatch, make_hydro_reservoir, make_thermal_gen) to fix incorrect ramp scaling and prevent over-constrained dispatch. Added a comprehensive test suite validating ramp limit calculations and base conversion logic across various MBASE values and generator types, including end-to-end parser tests. Preserved backward compatibility with base_conversion default of 1.0. This work reduces ramp-related dispatch risk, improves consistency across generator types, and increases reliability of unit commitment when users operate with non-100 MBASEs.