update release/4.0.0 base (#2968)

* updated docstings (#2934)

deprecated unused keyword args

* Feature/get all elements (#2939)

* Hallo

* Hallo Leute

* adding first draft of simple_hl_plot a function to easily highlight buses and lines paired with a hover functionality

* added function to get a dataframe of all elements in the net

* add test
clean comments
renaming

* add test

* add docu

* add changelog entry

* ltds_fix (#2938)

* updated ltds notebooks

* updated ltds notebooks, fixed LTDS converter

* added pytest split to tutorial_test pipeline (#2935)

* added pytest split to tutorial_test pipeline

* added notebook test times

* fixed many links (#2937)

other formatting

Co-authored-by: V3 <mike.vogt@iee.fraunhofer.de>

* Fix copyright text formatting in LICENSE file (#2914)

* Fix copyright text formatting in LICENSE file

* Refactor copyright notice in LICENSE

Updated copyright notice formatting in LICENSE file following [upstream changes](licensee/licensee#950) to handle multi-line attribution.

---------

Co-authored-by: KS_HTK <2981026+KS-HTK@users.noreply.github.com>

* added PowerElectronicsConnection to the LTDS converter, updated LTDS notebooks (PowerElectronicsConnection) (#2942)

Co-authored-by: David Heck <david.heck@iee.fraunhofer.de>

* ltds_pce (#2944)

* added PowerElectronicsConnection to the LTDS converter, updated LTDS notebooks (PowerElectronicsConnection)

* updated LTDS notebooks for mapping Excel data

* ltds_notebook (#2949)

* updated ltds notebooks

* updated LTDS notebooks for mapping Excel data

* updated LTDS notebooks for mapping Excel data

* ltds_notebook (#2950)

* updated ltds notebooks

* updated LTDS notebooks for mapping Excel data

* updated LTDS notebooks for mapping Excel data

* UKPN Jupiter Notebook

* fix UKPN Jupiter Notebook

* Feature check vkr percent (#2948)

* added check to check if vkr_percent values are reasonable.

* added changelog entry.

---------

Co-authored-by: KS_HTK <2981026+KS-HTK@users.noreply.github.com>

* Feature additional diagnostic functions (#2952)

* added more diagnostic functions.

* added changelog entry.

* fixed a small bug, used the wrong value in the reactance field.

* Correct loading_percent description in motor_par.csv (#2947)

Updated the description of loading_percent.

* ucte2pp conversion fixes (#2823)

* consider empty R dataframe in ucte conversion

* convert impedances and trafos with G/B=NaN to G/B=0

* change fillna for trafos and impedances to the ucte_parser

* fillna df if 0

* fix nan values in impedances and trafos

* ucte2pp: averaging voltages and clean up parser

* changelog entries for ucte2pp fixes

* average voltage setpoints using topological search instead of ucte name

* empty space at EOF

* fix codacy issue

* remove create_switch from pp_import_functions

* fix create_vsc functions

* changelog :)

* change symmetrical tap changer to 90 degree tap step degree

* correct handling of symmetrical PSTs in ucte2pp

* comment averaging function based on PR review

* changes ucte converter

* ucte2pp: add flag for voltage harmonization, with default false

* fix test

* fix tests and restrict tolerances a bit

---------

Co-authored-by: mrichter <mario.richter@iee.fraunhofer.de>
Co-authored-by: V3 <mike.vogt@iee.fraunhofer.de>

* Fix 2733 (#2951)

* change patch sizes for plot (#2733)

* fix patch sizes for plot only once (#2733)

`get_collection_sizes()` takes arguments to adjust the relative size of
an element.

---------

Co-authored-by: V3 <mike.vogt@iee.fraunhofer.de>

* Fix runopp(init="results") so the OPF solver preserves the model initial vector (#2902)

* Fix runopp(init=results) warm-start handling in pips OPF

* Update CHANGELOG for upcoming release fixes and features

---------

Co-authored-by: jereOG <jerelang@users.noreply.github.com>
Co-authored-by: V3 <mike.vogt@iee.fraunhofer.de>

* Feature/highlight plot (#2833)

* integrated highlighting feature into simple_plot

* integrated hover feature into simple_plot

* update plotting tutorial

* adjust color

* Fix unit g0_us (#2958)

attribute name g0_us_per_km is incorrectly named as g0_nf_per_km in add_zero_impedance_parameters function.

* updated branding with versions from marketing (#2953)

* [IMPROVEMENT] fix `bool` parameters input in `read_excel` and add `add_basic_std_types` parameter (#2961)

* Add basic std types flag to from_excel

Signed-off-by: furqan463 <ahmadfurqanc@gmail.com>

* Fix reading bool

Signed-off-by: furqan463 <ahmadfurqanc@gmail.com>

* Fix backward compatibility

Signed-off-by: furqan463 <ahmadfurqanc@gmail.com>

* Silence sonarcloud and codacy

Signed-off-by: furqan463 <ahmadfurqanc@gmail.com>

* Remove ruff ignore

---------

Signed-off-by: furqan463 <ahmadfurqanc@gmail.com>

* added permissions block to all workflows (#2964)

* updated the issue templates to use the issue types instead of labels and title (#2966)

minor changes in forms layouts

* Feature/revised issue templates (#2967)

* updated the issue templates to use the issue types instead of labels and title
minor changes in forms layouts

* fix for config not parsing by github (hopefully)
added documentation template
added emoji to template title for more visual guidance

* uniform formatting for templates

* added missing blank line at end of file

* fixed change from merge

---------

Signed-off-by: furqan463 <ahmadfurqanc@gmail.com>
Co-authored-by: Jan Wiemer <32835953+jwiemer112@users.noreply.github.com>
Co-authored-by: mrifraunhofer <94368111+mrifraunhofer@users.noreply.github.com>
Co-authored-by: V3 <mike.vogt@iee.fraunhofer.de>
Co-authored-by: Bryn Pickering <17178478+brynpickering@users.noreply.github.com>
Co-authored-by: David Heck <david.heck@iee.fraunhofer.de>
Co-authored-by: Arisaka97 <solitaire2312@gmail.com>
Co-authored-by: pawellytaev <86314586+pawellytaev@users.noreply.github.com>
Co-authored-by: mrichter <mario.richter@iee.fraunhofer.de>
Co-authored-by: Moritz <29129441+MoritzHauff@users.noreply.github.com>
Co-authored-by: Jeremias Lang <158100420+jerelang@users.noreply.github.com>
Co-authored-by: jereOG <jerelang@users.noreply.github.com>
Co-authored-by: Engr. Ahmad Furqan <ahmadfurqanc@gmail.com>

Author: 11 people

.github/ISSUE_TEMPLATE/bug_report.yaml .github/ISSUE_TEMPLATE/01-bug-report.yml.github/ISSUE_TEMPLATE/bug_report.yaml renamed to .github/ISSUE_TEMPLATE/01-bug-report.yml

@@ -1,7 +1,7 @@
-name: Bug Report
+---
+name: "🐛 Bug report"
 description: Report incorrect behavior in the pandapower library
-title: '[bug] YOUR TITLE'
-labels: bug
+type: bug
 
 body:
   - type: checkboxes
@@ -24,22 +24,6 @@ body:
             Tried basic troubleshooting (if a bug/error) like restarting the interpreter and checking the pythonpath
           required: true
 
-  - type: textarea
-    id: example
-    attributes:
-      label: Reproducible Example
-      description: >
-        Please follow [this guide](https://matthewrocklin.com/blog/work/2018/02/28/minimal-bug-reports) on how to
-        provide a minimal, copy-pastable example.
-      placeholder: >
-        from pandapower.create import create_empty_network
-
-        net = create_empty_network()
-
-        ...
-      render: python
-    validations:
-      required: true
   - type: textarea
     id: problem
     attributes:
@@ -56,22 +40,38 @@ body:
         Please describe or show a code example of the expected behavior.
     validations:
       required: true
+  - type: textarea
+    id: example
+    attributes:
+      label: Reproducible Example
+      description: >
+        Please follow [this guide](https://matthewrocklin.com/blog/work/2018/02/28/minimal-bug-reports) on how to
+        provide a minimal, copy-pastable example.
+      placeholder: >
+        from pandapower.create import create_empty_network
+
+        net = create_empty_network()
+
+        ...
+      render: python
+    validations:
+      required: true
   - type: textarea
     id: version
     attributes:
       label: Installed Versions
       description: >
         Please paste the output of ``pd.show_versions()``
       value: >
-        * python version:
-        * pandas version: 
-        * networkx version: 
-        * scipy version: 
-        * numpy version: 
-        * packaging version: 
-        * tqdm version: 
-        * deepdiff version: 
-        * Operating System name/version:
+        * Operating System name/version:  
+        * python version:  
+        * pandas version:  
+        * networkx version:  
+        * scipy version:  
+        * numpy version:  
+        * packaging version:  
+        * tqdm version:  
+        * deepdiff version:
     validations:
       required: true
   - type: checkboxes

…thub/ISSUE_TEMPLATE/feature_request.yaml …ub/ISSUE_TEMPLATE/02-feature-request.yml.github/ISSUE_TEMPLATE/feature_request.yaml renamed to .github/ISSUE_TEMPLATE/02-feature-request.yml .github/ISSUE_TEMPLATE/feature_request.yaml renamed to .github/ISSUE_TEMPLATE/02-feature-request.yml

@@ -1,7 +1,7 @@
-name: Feature Request
+---
+name: "✨ Feature request"
 description: Suggest an idea for pandapower
-title: '[feature] YOUR TITLE'
-labels: [Enhancement]
+type: feature
 
 body:
   - type: checkboxes
@@ -16,18 +16,15 @@ body:
             Read the relevant sections of the [documentation](https://pandapower.readthedocs.io/en/latest/about.html)
         - label: >
             Browse the repository, [tutorials](https://github.com/e2nIEE/pandapower/tree/develop/tutorials) and [tests](https://github.com/e2nIEE/pandapower/tree/develop/pandapower/test) for already existing functionalities
-  - type: checkboxes
+  - type: dropdown
     id: feature_checks
     attributes:
       label: Feature Type
-      description: Please check what type of feature request you would like to propose.
+      description: Please select what type of feature you would like to propose.
       options:
-        - label: >
-            Adding new functionality to pandapower
-        - label: >
-            Changing existing functionality in pandapower
-        - label: >
-            Removing existing functionality in pandapower
+        - Adding new functionality
+        - Changing existing functionality
+        - Removing existing functionality
   - type: textarea
     id: description
     attributes:
@@ -55,7 +52,7 @@ body:
     id: label_checks
     attributes:
       label: Label
-      description: Choose `labels` at the right side (e.g. `bug`, `controller`, `OPF`...).
+      description: Choose `labels` at the right side (e.g. `controller`, `OPF`...).
       options:
         - label: >
             Relevant labels are selected

.github/ISSUE_TEMPLATE/03-documentation.yml

@@ -0,0 +1,26 @@
+---
+name: "📝 Documentation"
+description: Something is missing or wrong in the documentation.
+labels: ["docs/tutorials"]
+
+body:
+  - type: textarea
+    attributes:
+      label: What is wrong in the documentation?
+      description: Tell us, what is wrong in the documentation?
+    validations:
+      required: false
+
+  - type: textarea
+    attributes:
+      label: What is missing in the documentation?
+      description: Tell us, what is missing in the documentation?
+    validations:
+      required: false
+
+  - type: dropdown
+    attributes:
+      label: Are you willing to provide a PR to address this?
+      options:
+        - "Yes"
+        - "No"

…ithub/ISSUE_TEMPLATE/blank_template.yaml …hub/ISSUE_TEMPLATE/10-blank-template.yml.github/ISSUE_TEMPLATE/blank_template.yaml renamed to .github/ISSUE_TEMPLATE/10-blank-template.yml .github/ISSUE_TEMPLATE/blank_template.yaml renamed to .github/ISSUE_TEMPLATE/10-blank-template.yml

@@ -1,7 +1,6 @@
+---
 name: Blank template
 description: Template for issues that are no bug report or feature request
-title: 'YOUR TITLE'
-labels: []
 
 body:
   - type: checkboxes
@@ -15,7 +14,7 @@ body:
         - label: >
             Read the relevant sections of the [documentation](https://pandapower.readthedocs.io/en/latest/about.html)
         - label: >
-            Browse the [tutorials](https://github.com/e2nIEE/pandapower/tree/develop/tutorials) and [tests](https://github.com/e2nIEE/pandapower/tree/develop/pandapower/test) for usefull code snippets and examples of use
+            Browse the [tutorials](https://github.com/e2nIEE/pandapower/tree/develop/tutorials) and [tests](https://github.com/e2nIEE/pandapower/tree/develop/pandapower/test) for useful code snippets and examples of use
   - type: textarea
     id: description
     attributes:

.github/ISSUE_TEMPLATE/config.yaml .github/ISSUE_TEMPLATE/config.yml.github/ISSUE_TEMPLATE/config.yaml renamed to .github/ISSUE_TEMPLATE/config.yml

@@ -1,10 +1,11 @@
+---
 # disable blank issue creation
 blank_issues_enabled: false
 #
 contact_links:
-  - name: pandapower  discussions
+  - name: pandapower discussions
     url: https://github.com/e2nIEE/pandapower/discussions
-#    about: Please ask and answer questions here.
+    about: Please ask and answer questions here.
 #  - name: GitHub Security Bug Bounty
 #    url: https://bounty.github.com/
 #    about: Please report security vulnerabilities here.

.github/workflows/github_test_action.yml

@@ -12,6 +12,9 @@ on:
       - 'CHANGELOG.rst'
       - '**/CHANGELOG.rst'
 
+permissions:
+  contents: read
+
 # https://stackoverflow.com/questions/66335225/how-to-cancel-previous-runs-in-the-pr-when-you-push-new-commitsupdate-the-curre
 concurrency:
   group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}

.github/workflows/test_release.yml

@@ -10,6 +10,9 @@ on:
     branches:
       - release/*
 
+permissions:
+  contents: read
+
 # A workflow run is made up of one or more jobs that can run sequentially or in parallel
 jobs:
 

.github/workflows/upload_release.yml

@@ -17,6 +17,10 @@ on:
           - 'testpypi'
           - 'pypi'
 
+permissions:
+  contents: read
+  id-token: none
+
 # A workflow run is made up of one or more jobs that can run sequentially or in parallel
 jobs:
   upload:

CHANGELOG.rst

@@ -3,12 +3,20 @@ Change Log
 
 [upcoming release] - 2026-..-..
 -------------------------------
+- [FIXED] runopp(init="results") now preserves the warm-start vector in the PIPS-backed AC OPF solver
+- [ADDED] added more functions to diagnostic
+- [ADDED] check to check if vkr_percent values are reasonable (see issue #786).
 - [FIXED] cim2pp shift_lv_degree was translated from wrong entry
 - [FIXED] UnboundLocalError in _from_ppc_branch when creating impedance elements
 - [ADDED] LTDS support
+- [FIXED] ucte2pp: voltage setpoints from gens connected to the same busbar are now averaged
+- [FIXED] ucte2pp: small X values are clipped to 0.05 Ohm (according to UCTE-DEF) to increase convergence
+- [FIXED] ucte2pp: symmetrical tap changers are now handled as symmetrical tap changers in pandapower (not ideal phase shifters)
+- [FIXED] ucte2pp: prevent nan values for impedances and transformers for B/G/P_fe/i0
 - [FIXED] cim2pp: CimConverter backwards-compatible (default value for cin_version)
 - [FIXED] jao converter: calculation of trafo parameters is based on primary side (hv) now
 - [ADDED] toolbox: :code:`get_all_elements` returns all elements of a pp.pandapowerNet as a DataFrame
+- [ADDED] highlighting feature and hovering functionality to :code:`simple_plot()`
 
 [3.4.0] - 2026-02-09
 -------------------------------

README.rst

@@ -1,5 +1,4 @@
-
-.. image:: https://www.pandapower.org/images/pp.svg
+.. image:: https://www.pandapower.org/images/pandapower_color.svg
    :target: https://www.pandapower.org
    :alt: logo
 
@@ -74,7 +73,7 @@ To get realistic load profile data and grid models across all voltage levels tha
 be used in pandapower, have a look at the *SimBench* `project website <https://www.simbench.net>`_ or
 `on GitHub <https://github.com/e2nIEE/simbench>`_.
 
-.. image:: https://www.pandapipes.org/images/pp.svg
+.. image:: https://www.pandapipes.org/images/pandapipes_color.svg
    :target: https://www.pandapipes.org
    :width: 270pt
    :alt: pandapipes_logo