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RELEASE.md

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Release 2.0.0

Highlights

  • Major changes to JSON configuration file and full access to TDcoSim features using the tdcosim command.
  • Support for dynamic current injection models (fast_der) on the D side and DER_A model on T side.
  • Performance improvements, batch processing of simulation runs, and option to use high performance ODE solvers.
  • Dashboard for visualizing results and additional methods for data analytics
  • Release on PyPI and updated user guide.

Major Features and Improvements

  • Performance has been improved for post-processing and saving of data at the end of co-simulation.

  • Dynamic current injection models have been added. These models reduce solution time by 10X to 100X when compared to the detailed DER models. These can be used by specifying fast_der in the DEROdeSolver field of the config file.

  • Option to use high performance ODE solvers available in DifferentialEquations.jl has been added for detailed DER models. These solvers reduce time by almost 2 to 10X when compared to the SciPy ODE solvers for a given PV penetration level. These can be selected by selecting diffeqpy in the DEROdeSolver field.

  • All TDcoSim user features (generate template, get template help, add user preferences, run simulation and launch dashboard) can be accessed through the tdcosim command line tool.

  • Example JSON configuration files for static or dynamic co-simulation may be generated using the template feature.

  • Co-simulation may be started using the run feature.

  • Co-simulation results may be visualized using a browser based interactive dashboard through the dashboard feature.

  • Path to PSS/E installation may be set using setconfig -p "path/to/psse"

  • defaultLoadType field has been added to simulationConfig to replace the T side load. The available options are ZIP load (zip) and composite load models (cmld).

  • cmldParameters has been added to psseConfig to specify properties of composite load models.

    simID, outputDir, and scenarioID fields have been added to outputConfig.

  • A logs field has been added to the config file. Logs generated during co-simulation will be stored in /tdcosim/logs/. Log level can be set using level (10, 20, 30, or 40). Error messages at feeder level can be enabled by setting saveSubprocessOutErr to True.

  • excludenode filed has been added to defaultFeederConfig. It is used to specify the list of T side nodes that will be excluded from being connected with a distribution feeder model.

  • Added additional analysis methods in the DataAnalytics module: compute_stability_time, lag_finder, instances_of_violation

  • Added additional plotting methods in the DataAnalytics module: plot_omega, plot_t_vmag, plot_t_delayed_voltage_recovery

  • Support for additional detailed DER model types: SolarPVDERThreePhaseNumba, SolarPVDERSinglePhaseConstantVdc.

  • User guide has been updated and following new chapters have been added: Using the configuration template, Data Visualization and Analytics, and Performance guide. Examples have been updated and config files for the examples are included in /tdcosim/examples.

Behavioral and Breaking Changes

  • run_time_domain.py and run_qsts.py are no longer supported for running co-simulation and were removed. The functionality has been replaced with tdcosim run -c "config.json"from command line.
  • The examples folder in root was relocated to /tdcosim/examples. Older examples were removed and new examples were added.
  • The SampleData folder in root was relocated to /tdcosim/data.
  • The output folder in root was removed.
  • The der_config.json was moved to /tdcosim/config/detailed_der_default.json
  • Default configuration will now correctly configure all the buses which were not specified through manualFeederConfig using the configuration provided through defaultFeederConfig.
  • If the T side node is not a load bus, distribution feeders won't be connected to it and an error will be produced.
  • The folder to store the results needs to be specified through the output and simID field in the configuration file.

Bug Fixes

  • Fixed numerous bugs related to performance and logging.

backward-incompatible Changes

  • Not compatible with pvder 0.5.0. and below.
  • Not compatible with configuration files used in V1.2.0

Thanks to our Contributors

This release contains contributions from Karthikeyan Balasubramaniam @karthikbalasu, Sang-iL Yim @yim0331, Siby Jose Plathottam @sibyjackgrove, Kumarsinh Jhala @Kumarsinh, and Shijia Zhao at Argonne National Laboratory. We thank suggestions from Ning Kang (INL), Rojan Bhattarai (INL), NERC System Planning Impacts from DER Working Group (SPIDERWG), and Reliability First Corporation.

Release 1.2.0

Highlights

  • Supported PSSE35
  • Added DER models, compatible with pvder 0.3.0.
  • Extended the maximum network size and simulation time

Major Features and Improvements

  • Supported PSSE35 with new configuration option:
"psseConfig": {"installLocation": "C:\\Program Files\\PTI\\PSSE35\\35.0\\PSSPY27"}
  • Support for following DER model types has been added: SolarPVDERThreePhase, SolarPVDERThreePhaseBalanced, and SolarPVDERThreePhaseConstantVdc which can be selected through the DER configuration file as shown below:
"basic_specs":{"model_type":"SolarPVDERThreePhase"}
"basic_options":{"Sinsol":100.0},
"module_parameters":{"Np":11,"Ns":735,"Vdcmpp0":550.0,"Vdcmpp_min": 525.0,"Vdcmpp_max": 650.0},
"inverter_ratings":{"Srated":50e3,"Vdcrated":550.0,"Ioverload":1.3,"Vrmsrated":177.0},
"circuit_parameters":{"Rf_actual":0.002,"Lf_actual":25.0e-6,
                            "C_actual":300.0e-6,"R1_actual":0.0019,"X1_actual":0.0561},
"controller_gains":{"Kp_GCC":6000.0,"Ki_GCC":2000.0,
                          "Kp_DC":-2.0,"Ki_DC":-10.0,
                          "Kp_Q":0.2,"Ki_Q":10.0,"wp": 20e4}

Behavioral changes

  • Extended the memory limit to simulate a large scale network and operation time: To avoid the out of memory error, TDcoSim generates reports according to the memory threshold. The memory threshold is automatically calculated during the simulation by the input network and system memory size.

Breaking Changes

Following breaking changes were introduced in the config file:

  • Replaced keywords: n_phases in basic_specs in DER setting with model_type:
"basic_specs":{n_phases":3}

to

"basic_specs":{"model_type":"SolarPVDERThreePhase"}

Bug Fixes and Other Changes

  • Added psutil as an additional dependency
  • Fixed unit test to compatible with the DER and PSSE updates

backward-incompatible Changes

  • Not compatible with pvder 0.2.0.

Thanks to our Contributors

This release contains contributions from Karthikeyan Balasubramaniam @karthikbalasu, Sang-il Yim @yim0331, and Siby Jose Plathottam @sibyjackgrove at Argonne National Laboratory. We thank suggestions from Ning Kang (INL) and Rojan Bhattarai (INL)

Release 1.1.0

Highlights

  • Increased user flexibility w.r.t. DER placement, and voltage ride through.
  • Compatible with pvder 0.2.0.

Major Features and Improvements

  • Ride through refactoring based on configurable thresholds:
"LVRT":{"0":{"V_threshold":0.5,"t_threshold":1.0,"mode":"momentary_cessation"}}
  • Configuring unique DERs at each node using PVPlacement:
"PVPlacement":{"50":{"derId":"50","powerRating":50,"pvderScale":1}}
"50":{"circuit_parameters":{"Rf_actual":0.002,"Lf_actual":25.0e-6, "C_actual":300.0e-6}}

Behavioral changes

  • Ride through: There are two modes for each threshold. momentary_cessation: Power output reduced to zero temporarily mandatory_operation: Try to maintain rated power output

    In all the modes, once the t_threshold times are breached, the DER is tripped (i.e. power output reduced to zero permanently). The config will be expected to work with any number of elements (>0) in the LVRT and HVRT dictionaries.

  • If initializeWithActual is True, PNominal and QNominal at each feeder node will be initialized with the actual power output from DER at 100 % insolation. If False, they will be initialized with rated apparent power output of DER.

Breaking Changes

Following breaking changes were introduced in the config file:

  • Replaced keywords: power_rating replaced with powerRating, voltage_rating replaced with VrmsRating replaced with, SteadyState replaced with steadyStateInitialization
  • Removed keywords: V_LV0/1/2,t_LV0/1/2/_limit,V_HV1/2,t_HV1/2_limit,VRT_INSTANTANEOUS_TRIP,VRT_MOMENTARY_CESSATION,

Bug Fixes and Other Changes

  • Fixed the handlers not found warning from logger when DER instances are created.

Backwards-Incompatible Changes

  • Not compatible with pvder 0.1.0.

Thanks to our Contributors

This release contains contributions from Karthikeyan Balasubramaniam @karthikbalasu, Sang-iL Yim @yim0331, and Siby Jose Plathottam @sibyjackgrove at Argonne National Laboratory. We thank suggestions from Ning Kang (INL) Rojan Bhattarai (INL), and Deepak Ramasubramanian (EPRI)).

Release 1.0.0

Initial release of TDcoSim.