Andes

New Models:

- ``PVD1`` model, WECC distributed PV model.
Supports multiple PVD1 devices on the same bus.
- Added ``ACEc`` model, ACE calculation with continuous freq.

Changes and fixes:

- Renamed `TDS._itm_step` to `TDS.itm_step` as a public API.
- Allow variable `sys_f` (system frequency) in equation strings.
- Fixed ACE equation.
measurement.
- Support ``kvxopt`` as a drop-in replacement for ``cvxopt``
to bring KLU to Windows (and other platforms).

- Renamed `models.non_jit` to `models.file_classes`.
- Removed `models/jit.py` as models have to be loaded and instantiated
anyway before undill.
- Skip generating empty equation calls.

- Defaulted `BaseVar.diag_eps` to `System.Config.diag_eps`.
- Added option `TDS.config.g_scale` to allow for scaling the
algebraic mismatch with step size.
- Added induction motor models `Motor3` and `Motor5` (PSAT models).
- Allow a PFlow-TDS model to skip TDS initialization by setting
`ModelFlags.tds_init` to False.
- Added Motor models `Motor3` and `Motor5`.
- Imported `get_case` and `list_cases` to the root package level.
- Added test cases (Kundur's system) with wind.

Added Generic Type 3 wind turbine component models:

- Drive-train models `WTDTA1` (dual-mass model) and `WTDS`
(single-mass model).
- Aerodynamic model `WTARA1`.
- Pitch controller model `WTPTA1`.
- Torque (a.k.a. Pref) model `WTTQA1`.

New features and models:

- Added renewable energy models `REECA1` and `REPCA1`.
- Added service `EventFlag` which automatically calls events
if its input changes.
- Added service `ExtendedEvent` which flags an extended event
for a given time.
- Added service `ApplyFunc` to apply a numeric function.
For the most cases where one would need `ApplyFunc`,
consider using `ConstService` first.
- Allow `selftest -q` for quick selftest by skipping codegen.
- Improved time stepping logic and convergence tests.
- Updated examples.

Default behavior changes include:

- ``andes prepare`` now takes three mutually exclusive arguments,
`full`, `quick` and `incremental`. The command-line now defaults
to the quick mode. ``andes.prepare()`` still uses the full mode.
- ``Model.s_update`` now evaluates the generated and the
user-provided calls in sequence for each service in order.
- Renamed model `REGCAU1` to `REGCA1`.

This release contains minor patches on v0.9.5.

This version contains bug fixes and performance tweaks.

- Fixed an `AntiWindup` issue that causes variables to stuck at limits.
- Allow ``TDS.run()`` to resume from a stopped simulation and run to the new
end time in ``TDS.config.tf``.
- Improved TDS data dump speed by not constructing DataFrame by default.
- Added tests for `kundur_full.xlsx` and `kundur_aw.xlsx` to ensure
results are the same as known values.