v7.3.0

To fix any issues due to migration, please go to the migration guide. Labels are clickable and lead to the section of the migration guide corresponding to the associated described change.

• indicates that some methods were deprecated;
• indicates a breaking change which could impact all users;
• indicates a breaking change impacting only custom IIDM implementations (most of the time, new IIDM methods/classes to implement). Note that this label is not added when another breaking change impacting all users is also present.

⭐ Key features

• Modeling of low loading limits (beta)
• Modeling of PQU diagrams for reactive limits (beta)
• Limit reduction API: be able to increase or a limit
• Resistance on DC switch
• Improvements on the binary IIDM format (BIIDM). It is now production ready!
• Many improvements on Power Factory DGS file import

📜 Release notes

🛡️ Vulnerability fixes

• Bump org.apache.commons:commons-configuration2 from 2.12.0 to 2.15.0 - Fixes CVE-2026-45205 / GHSA-337m-mw94-2v6g (#3925)
• (also in v7.2.2) Fix potential command injection vulnerability in LocalCommandExecutor (GHSA-jqvf-j3ww-r8c7) - Fixes CVE-2026-55673

IIDM

IIDM 1.17

• Bump IIDM to 1.17 (#3872)
• Add resistance to DC switch (#3863)
• Add a name to the permanent limits (#3909)
• Model low limits (#3920) - beta feature
• Add active power limits to AC/DC converters (#3940) - beta feature
• PQU diagram for reactive limits - Without serialization (#3949) - beta feature

In-memory implementation

• More detailed error messages at temporary limits creation (#3891)
• Topology-specific error messages at equipment creation (#3785)
• (also in v7.2.2) Fix concurrent access to network listener (#3921)
• (also in v7.2.2) Fix setConnectableBus with variants (#3895)
• Fix: Compute also connectables in CalculatedBus getTerminals() (#3744)

Serialization / deserialization

• Added test for Anonymize network id (#3890)
• Handle referenced busbar sections case at BUS_BRANCH export with keepOriginalTopology (#3905)
• Add option to import/export only the active operational limits groups (#3938)
• Use of channels for BIIDM and network copy (#3919)
• Skip writing default attribute values in IIDM serialization (#3826)
• BIIDM format natively ZSTD-compressed (#3969)
• Fix use of channels for BIIDM and network copy (#3968)

Network modifications

• (also in v7.2.1) Fix copying limits when converting three 2WT to one 3WT (#3848)
• (also in v7.2.1) Fix copying limits on modification ReplaceTeePointByVoltageLevelOnLine (#3859)
• (also in v7.2.1) Fix "revert operation" network modifications: don't try to remove a VoltageLevel when equipments are still present (#3861)
• Remove switches when revert connect line or voltage level on line (#3910)
• Report messages indicating if there are remaining branches when deleting a VL on revert modification (#3930)
• Add scaling documentation (#3958)
• Scaling: Fix scaling type missing from JSON and Platform Config (#3959)
• Allow to create ConnectablePosition extension for LineConnectionModification (#3932)
• Enhance createVoltageLevelSections with naming strategy taking into account the switchKind between busbar sections. (#3935)

Extensions

• Add observability area extension on voltage levels (#3836)
• Add private extensions validation (loadflow-validation) (#3820)

Other

• Fix asymmetric connect / disconnect on terminal, tie line, hvdc line and add default methods (#3885)
• DC connectable connect & disconnect method (#3942)
• Create schema specific to the version to validate (#3801)
• LoadScalable: limit reactive power scaling (#3896)
• Add setId method to Identifiables (#3928)
• Merge networks: improve exception message when duplicates are found (#3962)

Contingency

• Deprecate LimitViolation constructors and use LimitViolationBuilder instead (#3847)

Limit violations

• LimitViolationDetection - Ensure null is used as the default subject name when branch name is absent (#3922)

AMPL

• AMPL exporter v1.3: add batteries' voltage regulation support (#3900)

CGMES

CGMES import/update

• Fix CGMES connectivityNodesContainer performance (#3915)
• Update case date with scenarioTime when network.update is called (#3917)

CGMES export

• (also in v7.2.1) Set BaseVoltage based on the highest nominal voltage for lines with different voltages. (#3852)

Matpower

• Extend status (#3028)

Power Factory

• Fix DGS import issue with BOM (#3864)
• Power Factory DGS import: zero curmg (#3865)
• Power Factory: support ElmLodmv and ElmXnet elements (#3866)
• Power Factory: convert ElmTrfstat as a voltage level (like ElmSubstat) (#3868)
• DGS import of DC switches (#3869)
• Power Factory: object link references (#3875)
• Power Factory: improve robustness (#3876)
• Convert all ElmTerms to busbarSections based on configuration (#3883)
• Power Factory: Controls for twoWindingsTransformers and threeWindingsTransformers (#3888)
• Power Factory: import gps coordinates (#3960)

PSS/E

• Replace univocity parsers with FastCSV for CSV handling - PSSE + Refacto (#3720)

IEEE CDF

• Remove use of univocity parsers for handling fixed-width files (#3660)

Load flow

• Fix componentMode key in LoadFlowParameters toMap() (#3897)
• Add a method to remove all load flow output values (#3937)
• Add debug-dir parameter in load flow (#3862)

Security analysis

• Add itools parameters for Security analysis (#3722)
• Allow LimitReductions with a value above 1 (#3856)
• Adding parameters to filter monitored elements results (#3903, #3980)
• Add debug-dir parameter in Security Analysis (#3862)

Sensitivity analysis

• Fix bus id resolution when reading voltage sensibility factors (#3945)
• Add new types of sensibility variable (#3901)
• Add debug-dir parameter in Sensitivity Analysis (#3862)
• Handle moduleConfig in SensitivityAnalysisParameters (#3948)

Short-circuit

• Line-to-line short circuit (#3926)
• Line-to-line with earth connection short circuit (#3963)
• Add homopolar conductance and susceptance to LineFortescue (#3729)
• Add LineCouplings extension (#3730)
• Add magnetizing reactance support to TwoWindingsTransformerFortescue (#3737)

itools

• Check load flow parameters in itools (#3816)

Time Series

• Fix CompressedDataChunk splitting (#3898)
• [TimeSeries] New toCompactArray() and get(int) API (#3914)

Quality

• Improve error and documentation when deserializing json data files without version on top (#3936)
• Migration to new checkstyle (#3736)
• Add coverage detection on WindowsLocalCommandExecutor (#3979)

Documentation

• (also in v7.2.1) Fix equation formatting in documentation (#3849)
• Fix out-of-date example in ShuntCompensatorAdder's javadoc (#3857)
• Add one line of documentation about ratedS export for TwoWindingsTransformers in CGMES. (#3873)
• Make simulation parameters linkable (#3918)
• Fix javadoc jar generation in action-ial/action-ial-util (#3971)
• Add extension documentation (#3977)

Dependencies

• Migrate to powsybl-parent v29 (#3924)
• Update JgraphT to version 1.5.3 (#3889)
• Replace univocity parsers with FastCSV for CSV handling (#3627, #3720, #3660)
• Replace graphviz builder dependency with JGraphT (#3599)

Dependency removals

Removed dependency	PR
com.google.code.findbugs:annotations	#3599
com.google.code.findbugs:jsr305	#3599
com.univocity:univocity-parsers	#3660
org.anarres.graphviz:graphviz-builder	#3599

Dependency updates

Dependency	Previous version	New version	PR
commons-cli	1.9.0	1.11.0	#3892
commons-compress	1.27.1	1.28.0	#3892
commons-configuration2	2.12.0	2.15.1	#3892
commons-csv	1.14.0	1.14.1	#3892
commons-io	2.19.0	2.22.0	#3892
commons-lang3	3.18.0	3.20.0	#3892
commons-text	1.13.1	1.15.0	#3892
ejml	0.44.0	0.45.1	#3892
fastCsv	4.0.0	4.3.0	#3892
groovy	4.0.26	4.0.32	#3892
guava	33.4.8-jre	33.6.0-jre	#3892
jackson	2.21.1	2.21.4	#3892
jgrapht-core	1.5.2	1.5.3	#3889
jimfs	1.3.0	1.3.1	#3892
junit-jupiter	5.12.2	5.14.4	#3892
logback	1.5.26	1.5.34	#3892
maven-core	3.8.5	3.9.3	#3892
maven-plugin-annotations	3.15.1	3.15.2	#3892
maven-plugin-testing-harness	3.4.0	3.5.1	#3892
mockito	5.18.0	5.23.0	#3892
poi-ooxml	5.4.1	5.5.1	#3892
powsybl-math-native	1.4.0	1.5.0	#3966
rdf4j	5.1.3	5.3.1	#3892
slf4j	2.0.17	2.0.18	#3892
snakeyaml	2.4	2.6	#3892
xmlunit	2.10.2	2.11.0	#3892
xz	1.10	1.12	#3892
zstd-jni	1.5.7-3	1.5.7-10	#3892