NREL-Sienna/PowerSimulations.jl
Jun 2025 – Feb 2026
4 Months active
Languages Used
MarkdownJulia
Technical Skills
DocumentationAC power flow analysisHVDC systemsJulia programmingalgorithm designalgorithm development
Luke Kiernan
PROFILE
Luke Kiernan
Liam Kiernan contributed to the NREL-Sienna/PowerSimulations.jl and PowerSystems.jl repositories, building and refining features for power systems simulation and analysis. He developed robust algorithms for AC and HVDC power flow, enhanced data modeling and validation, and improved documentation to reduce user error. Using Julia and JSON, Liam addressed backend reliability by enforcing data invariants, optimizing performance, and expanding test coverage for complex scenarios. His work included fixing cost normalization bugs in market simulations and ensuring accurate time-step handling. The depth of his contributions is reflected in improved simulation accuracy, maintainable code, and clearer documentation supporting both onboarding and production use.
Overall Statistics
Feature vs Bugs
62%Features
Repository Contributions
37Total
Bugs
5
Commits
37
Features
8
Lines of code
1,339
Activity Months5
Your Network
81 peopleShared Repositories
18
Work History
February 2026
2 Commits
Feb 1, 2026February 2026 monthly summary focusing on bug fixes and reliability improvements in PowerSimulations.jl for NREL-Sienna. Delivered critical fixes to power market cost normalization across time resolutions and time-step handling in power flow evaluations, with tests and version bumps to PF/PNM to ensure compatibility.
2 Commits
Feb 1, 2026February 2026 monthly summary focusing on bug fixes and reliability improvements in PowerSimulations.jl for NREL-Sienna. Delivered critical fixes to power market cost normalization across time resolutions and time-step handling in power flow evaluations, with tests and version bumps to PF/PNM to ensure compatibility.
February 2026
January 2026
8 Commits • 3 Features
Jan 1, 2026Concise monthly summary for 2026-01 focusing on delivering features, fixing bugs, improving documentation, and expanding testing for PowerSystems.jl and PowerSimulations.jl. The month delivered measurable business value through reliability, clarity, and expanded modeling capabilities, with clear demonstrations of technical excellence across code quality, documentation, and test coverage.
January 2026
8 Commits • 3 Features
Jan 1, 2026Concise monthly summary for 2026-01 focusing on delivering features, fixing bugs, improving documentation, and expanding testing for PowerSystems.jl and PowerSimulations.jl. The month delivered measurable business value through reliability, clarity, and expanded modeling capabilities, with clear demonstrations of technical excellence across code quality, documentation, and test coverage.
December 2025
23 Commits • 4 Features
Dec 1, 2025December 2025 performance-focused development across PowerSimulations.jl and PowerSystems.jl. Delivered robust PF/HVDC testing enhancements, improved parallel branch handling and diagnostics, data export reliability fixes, and broad performance/type stability improvements. Strengthened unit handling and test coverage in PowerSystems.jl. These changes increase system reliability for PF/HVDC interactions, improve diagnostics for complex branch configurations, and ensure accurate, timestamp-based data exports and analytics downstream.
23 Commits • 4 Features
Dec 1, 2025December 2025 performance-focused development across PowerSimulations.jl and PowerSystems.jl. Delivered robust PF/HVDC testing enhancements, improved parallel branch handling and diagnostics, data export reliability fixes, and broad performance/type stability improvements. Strengthened unit handling and test coverage in PowerSystems.jl. These changes increase system reliability for PF/HVDC interactions, improve diagnostics for complex branch configurations, and ensure accurate, timestamp-based data exports and analytics downstream.
December 2025
November 2025
3 Commits
Nov 1, 2025November 2025 highlights focused on robustness and correctness of PowerSystems.jl base power handling. Implemented enforcement of non-zero base power across components, normalized zero values to the system base power, and ensured correct base power propagation in the data pipeline. Added targeted tests for static injection components and generators to validate simulation robustness. Results: improved data integrity, invariants preserved, and more reliable simulations with minimal performance impact.
November 2025
3 Commits
Nov 1, 2025November 2025 highlights focused on robustness and correctness of PowerSystems.jl base power handling. Implemented enforcement of non-zero base power across components, normalized zero values to the system base power, and ensured correct base power propagation in the data pipeline. Added targeted tests for static injection components and generators to validate simulation robustness. Results: improved data integrity, invariants preserved, and more reliable simulations with minimal performance impact.
June 2025
1 Commits • 1 Features
Jun 1, 2025June 2025 — Delivered targeted documentation improvements for PCM simulations in PowerSimulations.jl to ensure correct time series transformation parameters for day-ahead and real-time sequences, reducing user misconfiguration and support overhead. Focused on documentation quality and clarity to enable faster onboarding and reliable simulations.
1 Commits • 1 Features
Jun 1, 2025June 2025 — Delivered targeted documentation improvements for PCM simulations in PowerSimulations.jl to ensure correct time series transformation parameters for day-ahead and real-time sequences, reducing user misconfiguration and support overhead. Focused on documentation quality and clarity to enable faster onboarding and reliable simulations.
June 2025
Activity
Loading activity data...
Quality Metrics
Correctness93.6%
Maintainability87.6%
Architecture88.2%
Performance88.8%
AI Usage22.6%
Skills & Technologies
Programming Languages
JSONJuliaMarkdown
Technical Skills
AC power flow analysisDocumentationHVDC systemsHVDC technologyJulia programmingalgorithm designalgorithm developmentalgorithm optimizationbackend developmentbug fixingcode formattingcode maintenancecomponent managementdata analysisdata export
Repositories Contributed To
Overview of all repositories you've contributed to across your timeline
NREL-Sienna/PowerSystems.jl
Nov 2025 – Jan 2026
3 Months active
Languages Used
JSONJulia
Technical Skills
backend developmentdata modelingdata validationmodelingpower systems engineeringtesting