Prepare for new minor version release

.azure-pipelines/azure-pipelines-linux.yml

@@ -28,7 +28,6 @@ jobs:
       pip install pytest pytest-azurepipelines
       coverage run -m pytest  # Run the tests and check for test coverage.
       coverage report -m  # Generate test coverage report.
-      codecov  # Upload the report to codecov.
     displayName: 'pytest and coverage'
 
   - script: |

README.md

@@ -1,6 +1,8 @@
-# ANDES
+# LTB ANDES
 
-Python Software for Symbolic Power System Modeling and Numerical Analysis.
+<img src="docs/source/images/sponsors/CURENT_Logo_NameOnTrans.png" alt="CURENT ERC Logo" width="300" height="auto">
+
+Python software for symbolic power system modeling and numerical analysis, serving as the core simulation engine for the [CURENT Largescale Testbed][LTB Repository].
 
 |               | Latest                                                                                                                                        | Stable                                                                                                                                        |
 |---------------|-----------------------------------------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------|
@@ -53,7 +55,7 @@ Numerical code will be automatically generated for fast simulation.
 
 | Controller Model and Equation | ANDES Code |
 | ----------------------------- | ---------- |
-| Diagram: <br> ![](https://raw.githubusercontent.com/cuihantao/andes/master/docs/source/modeling/example-tgov1/tgov1.png) <br><br> Write into DAEs: <br> ![](https://raw.githubusercontent.com/cuihantao/andes/master/docs/source/modeling/example-tgov1/tgov1_eqns.png)  | ![](https://raw.githubusercontent.com/cuihantao/andes/master/docs/source/modeling/example-tgov1/tgov1_class.png) |
+| Diagram:  <br> ![](https://raw.githubusercontent.com/cuihantao/andes/master/docs/source/modeling/example-tgov1/tgov1.png)  <br>  Write into DAEs:  <br>  ![](https://raw.githubusercontent.com/cuihantao/andes/master/docs/source/modeling/example-tgov1/tgov1_eqns.png)  | ![](https://raw.githubusercontent.com/cuihantao/andes/master/docs/source/modeling/example-tgov1/tgov1_class.png) |
 
 In ANDES, what you simulate is what you document.
 ANDES automatically generates model documentation, and the docs always stay up to date.
@@ -100,17 +102,13 @@ H. Cui, F. Li and K. Tomsovic, "Hybrid Symbolic-Numeric Framework for Power Syst
 Please let us know if you are using ANDES for research or projects.
 We kindly request you to cite our [paper][arxiv paper] if you find ANDES useful.
 
-![Natinoal Science Foundation](https://raw.githubusercontent.com/cuihantao/andes/master/docs/source/images/sponsors/nsf.jpg)
-![US Department of Energy](https://raw.githubusercontent.com/cuihantao/andes/master/docs/source/images/sponsors/doe.png)
-![CURENT ERC](https://raw.githubusercontent.com/cuihantao/andes/master/docs/source/images/sponsors/curent.jpg)
-![Lawrence Livermore National Laboratory](https://raw.githubusercontent.com/cuihantao/andes/master/docs/source/images/sponsors/llnl.jpg)
-![Idaho National Laboratory](https://raw.githubusercontent.com/cuihantao/andes/master/docs/source/images/sponsors/inl.jpg)
+![Natinoal Science Foundation](https://raw.githubusercontent.com/CURENT/andes/master/docs/source/images/sponsors/nsf.jpg)
+![US Department of Energy](https://raw.githubusercontent.com/CURENT/andes/master/docs/source/images/sponsors/doe.png)
+![CURENT ERC](https://raw.githubusercontent.com/CURENT/andes/master/docs/source/images/sponsors/curent.jpg)
+![Lawrence Livermore National Laboratory](https://raw.githubusercontent.com/CURENT/andes/master/docs/source/images/sponsors/llnl.jpg)
+![Idaho National Laboratory](https://raw.githubusercontent.com/CURENT/andes/master/docs/source/images/sponsors/inl.jpg)
 
 # Sponsors and Contributors
-ANDES is the core simulation engine for the CURENT Largescale Testbed (LTB).
-More information about CURENT LTB can be found at the
-[LTB Repository](https://github.com/CURENT/ltb2).
-
 This work was supported in part by the Engineering Research Center
 Program of the National Science Foundation and the Department of Energy
 under NSF Award Number EEC-1041877 and the CURENT Industry Partnership
@@ -127,16 +125,17 @@ ANDES is licensed under the [GPL v3 License](./LICENSE).
 
 * * *
 
-[GitHub releases]:       https://github.com/cuihantao/andes/releases
-[GitHub issues]:         https://github.com/cuihantao/andes/issues
-[Github Discussions]:    https://github.com/cuihantao/andes/discussions
-[GitHub insights]:       https://github.com/cuihantao/andes/pulse
-[GitHub pull requests]:  https://github.com/cuihantao/andes/pulls
-[GitHub contributors]:   https://github.com/cuihantao/andes/graphs/contributors
+[GitHub releases]:       https://github.com/CURENT/andes/releases
+[GitHub issues]:         https://github.com/CURENT/andes/issues
+[Github Discussions]:    https://github.com/CURENT/andes/discussions
+[GitHub insights]:       https://github.com/CURENT/andes/pulse
+[GitHub pull requests]:  https://github.com/CURENT/andes/pulls
+[GitHub contributors]:   https://github.com/CURENT/andes/graphs/contributors
 [readthedocs]:           https://andes.readthedocs.io
 [release notes]:         https://andes.readthedocs.io/en/latest/release-notes.html
 [arxiv paper]:           https://arxiv.org/abs/2002.09455
 [tutorial]:              https://andes.readthedocs.io/en/latest/tutorial.html#interactive-usage
-[examples]:              https://github.com/cuihantao/andes/tree/master/examples
-[verification]:          https://github.com/cuihantao/andes/tree/master/examples/verification
+[examples]:              https://github.com/CURENT/andes/tree/master/examples
+[verification]:          https://github.com/CURENT/andes/tree/master/examples/verification
 [Binder]:                https://mybinder.org/v2/gh/cuihantao/andes/master
+[LTB Repository]:       https://github.com/CURENT

andes/core/var.py

@@ -92,7 +92,7 @@ def __init__(self,
         self.v_iter = v_iter  # the implicit equation (0 = v_iter) for iterative initialization
         self.e_str = e_str    # residual equation string
 
-        self.discrete = discrete
+        self.discrete = discrete        # discrete component on which this variable depends
         self.v_setter = v_setter        # True if this variable sets the variable value
         self.e_setter = e_setter        # True if this var sets the equation value
         self.v_str_add = v_str_add

andes/io/matpower.py

@@ -307,7 +307,7 @@ def _get_bus_id_caller(bus):
 
     """
 
-    if np.array(bus.idx.v).dtype == np.object:
+    if np.array(bus.idx.v).dtype == object:
         return lambda x: bus.idx2uid(x) + 1
     else:
         return lambda x: x

andes/models/dynload/fload.py

@@ -56,7 +56,9 @@ def __init__(self, system, config):
         self.group = 'DynLoad'
         self.flags.tds = True
 
-        self.bus = ExtParam(model='PQ', src='bus', indexer=self.pq)
+        self.bus = ExtParam(model='PQ', src='bus', indexer=self.pq,
+                            export=False,
+                            )
 
         self.p0 = ExtService(model='PQ', src='Ppf', indexer=self.pq,
                              tex_name='P_0',

andes/models/static/pq.py

@@ -67,9 +67,13 @@ class PQ(PQData, Model):
 
     .. code-block :: python
 
-        ss.PQ.config.p2p = 1.0 ss.PQ.config.p2i = 0 ss.PQ.config.p2z = 0
+        ss.PQ.config.p2p = 1.0
+        ss.PQ.config.p2i = 0
+        ss.PQ.config.p2z = 0
 
-        ss.PQ.config.q2q = 1.0 ss.PQ.config.q2i = 0 ss.PQ.config.q2z = 0
+        ss.PQ.config.q2q = 1.0
+        ss.PQ.config.q2i = 0
+        ss.PQ.config.q2z = 0
 
     Then, the constant power portion can be altered by changing the ``Ppf`` and
     ``Qpf`` constants for active power and reactive power.

andes/models/timer.py

@@ -108,6 +108,17 @@ class Fault(ModelData, Model):
     Non-convergence can occur in the proximity of a fault due to various reasons,
     including network power transfer capability limitation and parameter issues
     of controllers.
+
+    When a fault gets cleared, algebraic variables change drastically. E.g.,
+    voltages can go from nearly zero back to 1.0. As we are using Newton's
+    method for solving the DAE, the initial values are crucial for the immediate
+    step after fault clearance.
+
+    This Fault model restores the pre-fault values for algebraic variables
+    ``Fault.config.scale`` is the scaling factor to be multiplied to the
+    pre-fault values for adjusting the initial values. Some trial and error are
+    expected for severe disturbances, combined with increasing the fault
+    reactance ``xf``.
     """
 
     def __init__(self, system, config):

andes/routines/pflow.py

@@ -270,10 +270,19 @@ def run(self, **kwargs):
     def report(self):
         """
         Write power flow report to a plain-text file.
+
+        Returns
+        -------
+        bool
+            True if report was written, False otherwise.
         """
+
         if self.system.files.no_output is False:
             r = Report(self.system)
             r.write()
+            return True
+
+        return False
 
     def _set_xy(self, xy):
         """

docs/source/conf.py

@@ -213,7 +213,7 @@
     'numpy': ('https://docs.scipy.org/doc/numpy/', None),
     'scipy': ('https://docs.scipy.org/doc/scipy/reference/', None),
     'pandas': ('https://pandas.pydata.org/pandas-docs/stable', None),
-    'matplotlib': ('https://matplotlib.org', None),
+    # 'matplotlib': ('https://matplotlib.org', None),
 }
 
 # Favorite icon

docs/source/index.rst

@@ -15,27 +15,30 @@ ANDES documentation
 
 
 **Useful Links**: `Binary Installer`_ | `Source Repository`_ | `Report Issues`_
-| `Q&A`_ | `Try in Jupyter Notebooks`_
+| `Q&A`_ | `Try in Jupyter Notebooks`_ | `LTB Repository`_
 
-.. _`Source Repository`: https://github.com/cuihantao/andes
-.. _`Report Issues`: https://github.com/cuihantao/andes/issues
-.. _`Q&A`: https://github.com/cuihantao/andes/discussions
+.. _`Source Repository`: https://github.com/CURENT/andes
+.. _`Report Issues`: https://github.com/CURENT/andes/issues
+.. _`Q&A`: https://github.com/CURENT/andes/discussions
 .. _`Binary Installer`: https://pypi.org/project/andes/
 .. _`Try in Jupyter Notebooks`: https://mybinder.org/v2/gh/cuihantao/andes/master
-.. _`LTB Repository`: https://github.com/CURENT/ltb2
+.. _`LTB Repository`: https://github.com/CURENT/
 
-ANDES is an open-source Python library for power system modeling, computation,
-analysis, and control. It supports power flows calculation, transient stability
+.. image:: /images/sponsors/CURENT_Logo_NameOnTrans.png
+   :alt: CURENT Logo
+   :width: 300px
+   :height: 74.2px
+
+LTB ANDES is an open-source Python library for power system modeling, computation,
+analysis, and control, serving as the core simulation engine for the CURENT Large scale
+Testbed (LTB). It supports power flows calculation, transient stability
 simulation, and small-signal stability analysis for transmission systems. ANDES
 implements a symbolic-numeric framework for rapid prototyping of
 differential-algebraic equation-based models. In this framework, a comprehensive
 :ref:`library of models <modelref>` is developed, including the full
 second-generation renewable models. Models in ANDES have been :ref:`verified
 <verification>` with commercial software.
 
-ANDES is the core simulation engine for the CURENT Largescale Testbed (LTB).
-More information about CURENT LTB can be found at the `LTB Repository`_.
-
 .. panels::
     :card: + intro-card text-center
     :column: col-lg-6 col-md-6 col-sm-6 col-xs-12 d-flex

requirements-extra.txt

@@ -7,7 +7,6 @@
 #
 # Only one `#` is allowed per line. Lines starting with `#` are ignored.
 
-codecov #                      dev
 coverage #                     dev
 pytest==7.0.1 #                dev
 flake8 #                       dev
@@ -24,7 +23,6 @@ pre-commit #                   dev
 numba #                        dev, perf
 
 pandapower #                   interop
-GridCal #                      interop
 
 # below work around a bug with tqdm bar with ipywidgets 8.0.1
 ipywidgets==7.7 #              web