v0.15.0

Release notes

Security analysis

• Support of shunt compensator contingency in security analysis (#422)
• Fix security analysis with phase control on (#419)
• Cleanup security analysis unit tests (#424)
• Fix: BusResult creation after a contingency (#421)
• Fix: save and restore voltage in bus state (#418)
• Fix security analysis performance issue related to connectivity calculation (#409)

Sensitivity analysis

• Sensitivity analysis: DC load contingency (#362)

Common new features

• Shunt compensator voltage control (#391) and fix shunt voltage control (#414)
• Voltage magnitude initialization (#392)

Common fixes and refactorings

• Synthesize warnings (#354)
• Add option to write inactive equations and terms (#423)
• Remove discrete voltage control mode (#420)
• Refactor discrete voltage control (#413)
• Fix: network should have at least one PV bus (#415)
• Fix voltageControlEnabled typo (#416)
• Bump powsybl-core to 4.6.0 (#411)
• Move LfLimit to LfBranch (#412)
• Shunt compensator refactoring (#410)
• Refactor shared voltage control modelling (#408)
• Refactor equation term operations (#406)
• Add performance logs (#405)
• Rename variable and equation type (#404)
• Use Identifiable.removeProperty (#403)
• Improve LfNetwork loading for DC calculations (#402)
• Bump to powsybl-core 4.6.0-RC1 (#400)
• Fix method isDeriveA1 (#401)
• Rename Variable and Equation getNum to getElementNum (#399)
• Add StateVector (#384)
• Refactor bus calculated voltage (#397)
• Include VariableSet in EquationSystem (#395)
• Refactor branch equation term (#394)
• Add max iteration and NR epsilon to parameters (#393)
• AC sensitivity analysis: fix predefined results in post contingency run (#373)
• Fix DcValueVoltageInitializer (#390)
• Implements parameters toString() (#389)
• Remove slack bus selection hack when multiple components (#388)
• Log slack bus ID and selection method (#386)
• Print element ID with mismatches (#385)
• Fix matrix implementation in unit tests (#383)

v0.14.0

Release notes

Fixes and refactorings

• Replace addAndGetElement (#351)
• Fix min impedance cut (#235)
• Fix failing unit test (#363)
• Refactor parameters (#361)
• Move VoltageInitializer to network.util package (#364)
• Fix cyclic dependencies (#365)
• Refactor network loader (#367)
• switch git branch master to main (#370)
• Fix: voltage controls discarded when controller and controlled buses are not in the same SC (#371)
• Fix NPE for glsk on a open monitored branch (#372)
• Fix Sonar issues (#374)
• Fix A1 and R1 derivative calculation (#377)
• Fix double nan check (#379)
• Various refactoring (#380)
• Various refactoring (#381)
• Bump powsybl-core to 4.5.0 (#376)

New features

The two following new features offer the possibility to implement private outer-loops and to run them with open ones:

• Add user object to generators (#368)
• Equation system post processor (#375)

Full Changelog: v0.13.0...v0.14.0

v0.13.0

Release notes

• Fix reference flow that were not computed and set as NaN when variable element is not in the main component but function element is (#349)
• Bump to powsybl-core 4.4.0 (#359)
• Support of VSC converter station remote regulating terminal (#357)
• Remote reactive power control support (#266)
• Traverser: get switches and internal connections directly from node (#343)
• Security analysis: support new branch result API (#326)
• Bump powsybl-core 4.4.0-RC1 (#358)
• Security analysis: disconnect terminals of isolated end nodes (#325)
• Outer loop configuration plugin support (#353)
• User object to extend LF network (#352)
• Make EquationSystem more reusable (#350)
• Current limiter implementation (#340)
• Fix merge control order (#341)
• Refactoring: fix code duplication (#346)
• Improve equation system indexing performance (#252)
• Update slack link (#339)

v0.12.0

Release notes

• Bump powsybl-core 4.3.1 (#335)

• Load flow:

  • Change plausible max active power default value to 5000 (#332)
  • Support of static var compensator with VoltagePerReactivePowerControl extension (slope) (#304)
  • Support of slack distribution on loads with negative P0 (#302)

• Sensitivity analysis:

  • Generator contingency for DC sensitivities (#318)
  • Support of BusVoltagePerTargetV related to a transformer for AC sensitivities (#299)

• Security analysis:

  • First support of DC security analysis (#313)
  • Monitor security analysis (#315)

Bug fixes

• Fix LfNetwork bus numbering bug (#317)
• Security analysis:
  • Low voltage violations contained the value of the high voltage limit (#328)
  • Fixes in branch results of security analysis (#329)
• Sensitivity analysis:
  • Fix coupler detection bug (#334)
  • Fix function reference for BranchFlowPerPSTAngle factor (#324)
  • Fix unsupported balance type (#331)

Quality and performances

• Improve load flow performances (#282)
• Tests refactoring (#314)
• Discrete control optional (#319)
• Don't check non null on debug method toString() (#320)
• Clean up per-uniting (#330)

v0.12.0-alpha-1

Release notes

• Bump powsybl-core 4.3.0-alpha-1 and adapt to new security analysis API (#307)
• DC security analysis (#313)
• Monitor security analysis (#315)
• Discrete control optional (#319)
• Support of slack distribution on loads with negative P0 (#302)
• Don't check non null on debug method toString() (#320)
• AC sensitivity analysis: Support of BusVoltagePerTargetV related to a transformer (#299)
• Fix LfNetwork bus numbering bug (#317)
• Tests refactoring (#314)

v0.11.0

Release notes

Loadflow

• Support of new LoadFlow parameters isDcUseTransformerRatio and countriesToBalance (#308)
• Support of all connected components of a network for AC and DC loadflows (#295)
• Implementation of PROPORTIONAL_TO_GENERATION_P balanceType (#283)
• Add slackBusPMaxMismatch parameter (#288)
• Management of incompatible generators targetV (#274)

Sensitivity analysis

• Support of dangling line boundary bus sensitivity (#309)
• Sensitivity on the active power setpoint of an HVDC line (#277)
• Detects coupler when propagating contingency in a sensitivity analysis (#303)
• Sensitivity analysis: support of dangling line contingency (#300)
• Improve DC sensitivity analysis performance (#287)
• Bug fixes in sensitivity analysis:
  • Fix voltage reference values for BusVoltagePerTargetV factor (#301)
  • Add a bus cache to improve input handling performance (#298)
  • Fix NPE on disconnected generator (#297)
  • Fix disconnected branch issue in sensitivity analysis (#280)
• Add the possibility of a sensitivity analysis replay (#293)
• Manage of additional factors (#265)

Common

• Update powsybl-core to 4.2.0 (#310)
• Use ServiceLoader.load with the current classloader instead of the context classloader (#306)
• Add an option to dump input files for debugging (#281)
• Target vector update refactoring (#262)

v0.10.1

Release notes

• DC sensitivity analysis: bug fix in case of contingency losing a participating element (#272)

v0.10.0

Release notes

• Migrate to powsybl-core 4.1.0
• Sensitivity analysis
  • AC Sensitivity Analysis (#229)
  • Add sensitivity internal API (#260)
  • Add sensitivities of a variable on branch intensity and of a targetV on a bus voltage (#231, #253)
  • Change disconnected sensitivities management (#236)
  • DC sensitivity analysis:
    • Fix contingency involving phase tap changer (#237)
    • Optimize DC performances (#239)
    • Fix bug on DC loadflow when using multiple contingencies with transformers (#240)
    • Do not show warning if no factor has been skipped (#250)
    • Manage contingency on HVDC line (#264)
• Various refactorings
  • Refactoring voltage control (#168)
  • Network listener (#215)
  • Refactor jacobian matrix update (#216)
  • Refactor DC sensitivity analysis (#217)
  • Simple variable equation term refactoring (#245)
  • Remove variable activation/deactivation (#247)
• Security analysis: support of current temporary limits and violations filter (#195)
• Various fixes
  • Remove observer (#228)
  • Fix default parameter loading (#261)
  • Use fast connected connectivity algo everywhere (#256)
  • Fix an old TODO about parameters in AC equation system (#254)
  • Upgrade Mockito version (#255)
  • Fix current magnitude equation for closed branch side 2 (#251)
  • Print activated outer loops (#249)
  • Slack bus selector type config should not be mandatory (#242)
  • Create a load flow result even if no calculation (invalid network) (#243)
  • Fix tests on three windings transformers (#238)
  • Fix star bus nominal voltage (#234)
  • Only update network state in case of convergence (#233)
  • Fix method dispatchQ (#227)
  • Increase slack active power distribution threshold (#232)
  • Add ratio to lines with differents nominal voltage at both ends (#230)

v0.9.0

• Upgrade to java 11 (#214)
• Migrate to PowSyBl 4.0.1 (#221, #224)
• DC sensitivity analysis (#82, #178, #189, #206, #207, #208, #219)
  • Sensitivity of injections (generators, loads, HVDCs) and phase shifters to branch flow
  • Sensitivity on N state and N-K states
  • Compute reference active power flows (N and N-K)
  • Distributed slack
  • Manage contingency propagation
• Fix participating generator with zero droop (#223)
• Plausible PMax parameter (#212)
• Fix DC equations when a1 is a variable (#213)
• Security analysis on bus breaker model (#204)
• Various refactoring
  • Refactor transformer conversion (#210)
  • Avoid looping on all branches at each contingency (#194)
  • Improve parameters management (#187)
  • Disabled parameter in LfBus/LfGenerator (#211)
• Transformer voltage control improvement (#200)
• Migrate to GraalVM 21.0.0 (#203, #222)
• Even-Shiloach corrections and optimisation (#192, #193)
• LoadFlowResult management after a DC loadflow (#190)
• Static Var Compensator : MinQ and MaxQ are computed using local voltage (#180)
• Slack distribution support for DC power flow (#183)
• Fix slack distribution on generation (#182)
• Add a parameter to use or not transformer ratio in DC mode (dcUseTransformerRatio) (#181)
• Discard phase control if controlled branch is null or open (#177)

v0.8.0

Release notes

• Migrate to powsybl-core 3.8.0 (#175)
• Discrete controls:
  • Phase control: remote active power mode (#153, #166, #173)
  • Voltage remote and local control for transformers (#127, #173)
• Voltage limit violations corrections (#164)
• Power factor constant on loads during slack distribution if corresponding parameter enabled (#170)
• Bump GraalVM to 20.3.0 (#174)
• Readme update (#165)
• Tests correction: using same junit version (#169)