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Change Log

Version 0.4.35 – 2026-09-02

Fixes

  • Stabilized MATPOWER case import and bus indexing in the presence of isolated buses.
  • Fixed bus classification and ordering to ensure consistent solver input for flatstart and non-flatstart runs.
  • Improved internal consistency checks for network topology before solver execution.

Improvements

  • Refined MATPOWER comparison tooling (Vm/Va diff diagnostics and angle alignment).
  • Minor internal cleanups in MatpowerIO and network initialization to improve robustness.

Version 0.4.34 – 2026-06-02

Fixes

  • Closed Issue 110:
  • Corrected per‑unit conversion issues discovered during the refactoring of the MATPOWER import interface, including proper handling of line, transformer, and shunt parameters.
  • Fixed PU conversion inconsistencies for shunts and aligned all shunt handling with the unified Y‑model.
  • Harmonized Q‑limit checking across all solvers and ensured consistent PV/PQ switching behavior.

New Features

  • Updated shunt modeling: addShunts now exclusively supports the Y‑model; voltage‑dependent shunt power must be represented via loads or generators.
  • Unified solver logic for reactive power limits and PV/PQ switching
  • added new testcase matpower vs manual network

Version 0.4.33 – 2026-02-02

New Features

  • Added on-demand MATPOWER case handling via FetchMatpowerCase.ensure_casefile (automatic download of .m cases and optional generation of .jl cases)
  • Added option to control flat start behaviour in AC power flow (flatstart)

Internal Changes

  • Refactored MATPOWER case import logic and removed redundant example-based loaders

Version 0.4.32 – 2026-30-01

New Features

  • Added function to export calculated network

Version 0.4.31 – 2026-28-01

Title

  • Change license from BSD-3-Clause to Apache License 2.0

Version 0.4.30 – 2026-28-01

Bug Fixes

  • Importing Matpower files, wrong conversion to per unit system

New Features

  • Option to choose flatstart

Version 0.4.29 – 2025-12-13

New Features

  • Support native 3-winding transformers in Sparlectra without AUX bus generation and allow non-PU parameterization #90
  • Support 2-winding transformers as well in non-PU parameterization #90

Version 0.4.28 – 2025-12-12

Bug Fixes

  • Close Issue #85: test totalBusPower vs. TotalLosses failed for solver != rectangular

Version 0.4.27 – 2025-12-11

New Features

  • Added 3Bus Testcase with PV Generator
  • Added createTest5BusNet with multiple generators at one bus and zero injection generator
  • Issue #81 Fix Calculatation of Generators with Zero Injektion
  • Mark PV->PQ switching in printACPFlowResults Log

Bug Fixes

  • fixes per unit calculation for line shunt admittance
  • fixes calculation of losses

Version 0.4.26 – 2025-12-04

  • Issue #74: Multiple Generators at One Bus Not Handled Correctly
  • Documentation Updates

Version 0.4.25 – 2025-11-29

Added

  • Rectangular (Complex-State) Newton–Raphson Solver

Version 0.4.24 – 2025-11-20

Added

  • Q-limit handling with automatic PV→PQ switching when a generator hits its reactive power limits.

Version 0.4.23 (2025-11-11)

New Features

  • Full-state Newton–Raphson solver

Version 0.4.22 (2025-08-27)

Bug Fixes

  • small fixes

Version 0.4.21 (2025-03-14)

New Features

  • adding functions to remove elements from a net

Version 0.4.20 (2025-03-11)

  • internal reorganization and small bugfixes

Version 0.4.19 (2024-10-14)

Bug Fixes

  • pu calculation for transformer impedance

Version 0.4.18 (2024-04-14)

Bug Fixes

  • closes issue#48 "printout jacobian runs into error"

Version 0.4.17 (2024-04-14)

New Features

  • added testcase for importing Matpower files

Bug Fixes

  • bugfix wrong function call in createnet_powermat

Version 0.4.16 (2024-04-13)

Bug Fixes

  • bugfix shunt index for isolated buses, closes issue #38

Version 0.4.15 (2024-04-12)

New Features

  • Implemented a function to detect isolated buses and incorporate them into the network calculation (Issue #38)

Version 0.4.14 (2024-04-12)

Bug Fixes

  • bugfix addShuntPower, closes issue #36

Version 0.4.13 (2024-04-12)

New Features

  • added attribute for Lineparameters based on length
  • added update parameter function for network
  • added workshop documentation

Bug Fixes

  • taking line length not (always) into account for line parameters
  • parsing emtpy lines of Matpowerfiles
  • documentation rendering

Version 0.4.12 (2024-04-08)

New Features

  • added functions to facilitate the modification of networks.
  • documentation available at https://welthulk.github.io/Sparlectra.jl/.

Bug Fixes

  • print prosumers

Version 0.4.11 (2024-04-05)

New Features

  • make changes to imported Matpower networks after import.
  • added functions to facilitate the creation of networks.

Enhancements

  • added documentation make file

Bug Fixes

  • import and parser for Matpower .m files

Version 0.4.10 (2024-03-30)

New Features

  • removed numerous redundant functions, partially restructured classes
  • removed support for CGMES due to the availability of numerous alternative libraries
  • removed support for the legacy custom JSON data format (potentially subject to reintroduction at a later stage)
  • added functions to facilitate the creation of networks
  • better performance

Bug Fixes

  • calculation of branch flow and losses
  • branches out of service

Version 0.4.8 (2024-03-26)

  • first package release registered in the Julia registry

Version 0.4.1 (2023-12-19)

  • Initial release of Sparlectra

Version 0.4.0 (2023-11-30)

  • Initial public commit of Sparlectra