Power systems studies and software automation specialists 2026-04-13T00:00:00Z https://daiglegrid.com Arnada Engineering webmaster@daiglegrid.com 2021-10-24T00:00:00Z https://daiglegrid.com/2021/10/24/fix-windows-11-upgrade-issues/ <p>Users who have upgraded to Windows 11 are reporting that the license check fails. Uninstall (required; do not only reinstall), download the latest version, and reinstall to fix.</p> <p>As always, please report any issues to <a href="mailto:kestrel@kestrel-solver.com">kestrel@kestrel-solver.com</a>.</p> 2021-12-05T00:00:00Z https://daiglegrid.com/2021/12/05/kestrel-emt-v091-released/ <p><strong>General</strong></p> <ul> <li>Fixed an issue where upgrading Windows versions could invalidate the software license.</li> <li>MATLAB and Python code blocks can now use a set “Call Rate” to drastically improve performance in circumstances where the code does not need to be executed every timestep.</li> <li>Improved numerical core performance.</li> <li>Individual pole control on time switches.</li> <li>Phasor and RMS blocks now have a “nPerCycle” parameter to drastically improve performance in small timestep simulations.</li> <li>Coupled RL circuits now have a X/Reactance input option</li> <li>Minor interface improvements</li> </ul> 2022-08-12T00:00:00Z https://daiglegrid.com/2022/08/12/kestrel-emt-v092-released/ <p><strong>General</strong></p> <ul> <li>Added ArresterWorks lightning arrester model.</li> <li>Added Varistor V/I Curve plotting in parameter menu.</li> </ul> 2024-01-16T00:00:00Z https://daiglegrid.com/2024/01/16/kestrel-emt-v094-released/ <p><strong>General</strong></p> <ul> <li>New KCF file format– Human-readable XML</li> <li>Command Line Version (“KestrelCLI.exe”) added</li> <li>PDF Documentation added</li> <li>Example circuits added (in the sample_kcf folder)</li> <li>Python blocks may optionally share context (i.e. variables and functions) via user selectable “Python Scope” parameter.</li> <li>Python block updated to allow for 23 Inputs/12 Outputs in the GUI</li> <li>User may define sim_end() in the Python block at end of simulation</li> <li>Added KPlot button to open other HDF5 files</li> <li>Bugfix: Fixed issue where running a simulation with only Math blocks fails</li> <li>Bugfix: Fixed issue where HDF5 files are left open after a failed simulation</li> </ul> 2024-08-30T00:00:00Z https://daiglegrid.com/2024/08/30/kestrel-emt-/-kplot-20248-released/ <p>We’re switching to a calendar-based versioning structure to improve clarity.</p> <p><strong>General</strong></p> <ul> <li>KPlot has been split out as its own exe and can open properly formatted hdf5 files on its own without opening the Kestrel EMT GUI</li> <li>Fixed minor bugs relating to the Python module’s error reporting during failed simulations.</li> </ul> 2025-11-30T00:00:00Z https://daiglegrid.com/2025/11/30/kestrel-emt-202511-released/ <p><strong>Kestrel EMT</strong></p> <ul> <li>Added preliminary IEEE/CIGRE B4.82 Working Group .dll support. Users may now configure external .dll models using the Project Settings menu. All model parameters must be float64. Support for other datatypes coming soon.</li> <li>Added option for replacing single phase or uncoupled three phase transmission lines with a Pi equivalent if the timestep is too short.</li> <li>Replaced separate Add/Subtract/Multiply/Divide blocks with a single Arithmetic block with configurable input polarities and 1 or 3 phase I/O.</li> <li>Updated packaged Python version to 3.12</li> <li>Voltage source now includes IEEE Std C62.45 8/20 us and 1.2/50 us switching waveforms</li> <li>Added GAIN block – multiply inputs by a constant.</li> <li>Different Run Names are now stored in separate files to improve memory efficiency</li> <li>Improved Python block error handling.</li> <li>Fixed bug where Python de-initialization would cause the application to take a long time to close.</li> <li>Help is now searchable HTML instead of .pdf</li> <li>General performance improvements</li> </ul> <p><strong>KPlot</strong></p> <ul> <li>Multiple file input is now supported with the “File Manager” sidebar. Load results from multiple files and compare them side by side.</li> <li>Support for PTI .out files and KGRID .raw (point on wave) data added.</li> <li>Improved memory effiency and performance</li> <li>Minor interface improvements</li> <li>Help is now searchable HTMl instead of .pdf</li> </ul> 2026-04-13T00:00:00Z https://daiglegrid.com/2026/04/13/kestrel-emt-20264-released/ <p>A new version of Kestrel EMT and KPlot has been published here. See the changes below or visit the <a href="https://daiglegrid.com/kestrel-emt#download">Kestrel EMT page</a> for more information.</p> <p><strong>Kestrel EMT</strong></p> <ul> <li>Added Comment block, for annotating schematics.</li> <li>Added Transformer circuit component which supports entry of typical transformer test parameters including short circuit impedance and excitation current.</li> <li><strong>Breaking Change</strong> the previous “Transformer” component has been renamed to “Ideal Transformer”</li> <li>Improved handling of opening corrupted circuit files (.kcf files)</li> <li>Fixed bug where re-configuring a component (e.g. changing the number of phases in a resistor) would not propagate the monitored quantities correctly (e.g. current or voltage)</li> <li>Fixed bug where monitoring probes placed on individual phases of a three phase node would sometimes fail</li> </ul> <p><strong>KPlot</strong></p> <ul> <li>Added support for plotting CSV files. CSV files should be comma delimted, only contain numerical data, and the column that represents the x axis should be called “time”</li> <li>Added support for plotting PSCAD .inf/.out files. When using the tool, load the .inf file (not the .out file(s)).</li> </ul>