powsybl/powsybl-core
Dec 2024 – Mar 2026
6 Months active
Languages Used
JavaSPARQLMarkdown
Technical Skills
Backend DevelopmentCGMESData ConversionUnit TestingJavaRefactoring
Luma
PROFILE
Luma
Over six months, Zamarreno contributed to the powsybl-core repository by building and refining core features for CGMES data import, export, and conversion. He enhanced data fidelity and reliability by improving condenser imports across multiple CIM versions and clarifying export topology for open switches. His technical approach combined Java, SPARQL, and XML parsing to implement robust APIs, optimize SPARQL queries, and strengthen network topology handling. Zamarreno’s work included comprehensive unit testing and documentation, ensuring maintainability and regression safety. By focusing on backend development and data modeling, he delivered solutions that improved data processing accuracy and operational efficiency for downstream consumers.
Overall Statistics
Feature vs Bugs
71%Features
Repository Contributions
7Total
Bugs
2
Commits
7
Features
5
Lines of code
2,612
Activity Months6
Your Network
39 peopleSame Organization
@aia.es1
Work History
March 2026
1 Commits
Mar 1, 2026March 2026 monthly summary for powsybl-core: Focused on stabilizing the CGMES export topology. Delivered a targeted bug fix addressing corner cases in the CGMES export topology, including handling of disconnected load bus-breaker networks and proper creation of busbar sections during export. The work included refined unit tests to exercise these scenarios and prevent regressions, contributing to more reliable topology exports for downstream consumers. Overall, improved data integrity, reduced risk of export-time failures, and strengthened test coverage.
1 Commits
Mar 1, 2026March 2026 monthly summary for powsybl-core: Focused on stabilizing the CGMES export topology. Delivered a targeted bug fix addressing corner cases in the CGMES export topology, including handling of disconnected load bus-breaker networks and proper creation of busbar sections during export. The work included refined unit tests to exercise these scenarios and prevent regressions, contributing to more reliable topology exports for downstream consumers. Overall, improved data integrity, reduced risk of export-time failures, and strengthened test coverage.
March 2026
October 2025
1 Commits • 1 Features
Oct 1, 2025October 2025 monthly summary for powsybl-core focused on CGMES data import robustness and accuracy. Delivered targeted improvements to input file identification and EquipmentCore profile handling, strengthening data categorization and processing workflows. No major bugs fixed this month beyond routine maintenance tied to the feature.
October 2025
1 Commits • 1 Features
Oct 1, 2025October 2025 monthly summary for powsybl-core focused on CGMES data import robustness and accuracy. Delivered targeted improvements to input file identification and EquipmentCore profile handling, strengthening data categorization and processing workflows. No major bugs fixed this month beyond routine maintenance tied to the feature.
May 2025
2 Commits • 2 Features
May 1, 2025May 2025 monthly summary for powsybl-core: Delivered core platform enhancements with a new importer network update API and performance-focused optimizations for CIM16 SPARQL queries, coupled with expanded unit test coverage. These changes drive faster, more reliable data updates for downstream consumers and stronger system stability, aligning with business goals of operational efficiency and scalable data processing.
2 Commits • 2 Features
May 1, 2025May 2025 monthly summary for powsybl-core: Delivered core platform enhancements with a new importer network update API and performance-focused optimizations for CIM16 SPARQL queries, coupled with expanded unit test coverage. These changes drive faster, more reliable data updates for downstream consumers and stronger system stability, aligning with business goals of operational efficiency and scalable data processing.
May 2025
March 2025
1 Commits • 1 Features
Mar 1, 2025March 2025 monthly summary for powsybl-core: Implemented CGMES export topology clarification for non-retained open switches, with accompanying unit tests and documentation to clarify how such switches affect connectivity components, thereby improving topology handling and export reliability. Work focused on the bus/branch CGMES export mode, delivering stronger export stability and clearer behavior for downstream consumers.
March 2025
1 Commits • 1 Features
Mar 1, 2025March 2025 monthly summary for powsybl-core: Implemented CGMES export topology clarification for non-retained open switches, with accompanying unit tests and documentation to clarify how such switches affect connectivity components, thereby improving topology handling and export reliability. Work focused on the bus/branch CGMES export mode, delivering stronger export stability and clearer behavior for downstream consumers.
February 2025
1 Commits • 1 Features
Feb 1, 2025Monthly summary for 2025-02 (powsybl-core). Focused on delivering features with clear business value, improving export reliability, and enabling better HVDC boundary handling. Highlights include refactoring CGMES export to integrate ControlArea/TieFlow and introducing new conversion classes to map to PowSyBl Areas; removal of the dedicated CgmesControlAreas extension; the associated commit; and anticipated maintainability gains.
1 Commits • 1 Features
Feb 1, 2025Monthly summary for 2025-02 (powsybl-core). Focused on delivering features with clear business value, improving export reliability, and enabling better HVDC boundary handling. Highlights include refactoring CGMES export to integrate ControlArea/TieFlow and introducing new conversion classes to map to PowSyBl Areas; removal of the dedicated CgmesControlAreas extension; the associated commit; and anticipated maintainability gains.
February 2025
December 2024
1 Commits
Dec 1, 2024December 2024 monthly summary focusing on key accomplishments in the powsybl-core repository. Major work centered on improving data fidelity in CGMES conversions by fixing condenser imports across CIM14, CIM16, and CIM100, complemented by focused unit tests. The changes enhance cross-version compatibility and reliability for downstream consumers relying on CGMES data.
December 2024
1 Commits
Dec 1, 2024December 2024 monthly summary focusing on key accomplishments in the powsybl-core repository. Major work centered on improving data fidelity in CGMES conversions by fixing condenser imports across CIM14, CIM16, and CIM100, complemented by focused unit tests. The changes enhance cross-version compatibility and reliability for downstream consumers relying on CGMES data.
Activity
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Quality Metrics
Correctness90.0%
Maintainability84.2%
Architecture84.2%
Performance72.8%
AI Usage20.0%
Skills & Technologies
Programming Languages
JavaMarkdownSPARQL
Technical Skills
API DevelopmentBackend DevelopmentCGMESData ConversionData ModelingData ProcessingDocumentationJavaJava DevelopmentNetwork TopologyRefactoringSPARQLSoftware DesignTriple StoreUnit Testing
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