Running a dynamic simulation with dynawaltz#

You can use the module pypowsybl.dynamic in order to run time domain simulation on networks.

Start by importing the module:

import as pn
import pypowsybl.dynamic as dyn


For now we only support the Dynawaltz integration, provided by the Dynawo project.


The pypowsybl config file (generally located at ~/.itools/config.yaml) must define the dynawaltz section to find your dynawaltz installation and defaults parameters Here is an example of a simple config.yaml file. It uses the same configurations as in powsybl-dynawatlz.

    startTime: 0
    stopTime: 30
    homeDir: PATH_TO_DYNAWO
    debug: true
    parametersFile: ./models.par
    network.parametersFile: ./network.par
    network.parametersId: "1"
    solver.type: IDA
    solver.parametersFile: ./solver.par
    solver.parametersId: "1"


To make a dynamic simulation, you need multiple things:

  1. A dynamic mapping, it links the static elements (generators, loads, lines) to their dynamic behavior (alpha beta load)

  2. A curve mapping, it records the given values to be watch by the simulation tool. Curves are the output of the simulation

  3. A event mapping, it maps the different events. (their time event is done in configurations file for now)

There is a class for each of these elements.

You will see a lot of arguments called parameterSetId. Dynawaltz use a lot of parameters that will be stored in files.

Pypowsybl will find the path to this file in the powsybl config.yaml in dynawaltz-default-parameters.parametersFile value.

The parameterSetId argument must match an id in this file (generally called models.par).

Simple example#

To run a Dynawaltz simulation:

import pypowsybl.dynamic as dyn
import pypowsybl as pp

# load a network
network =

# dynamic mapping
model_mapping = dyn.ModelMapping()
model_mapping.add_alpha_beta_load("LOAD", "LAB") # and so on

# events mapping
events = dyn.EventMapping()
events.add_event("GEN_DISCONNECTION", dyn.EventType.DISCONNECTION, "GEN")
events.add_event("LINE_DISCONNECTION", dyn.EventType.DISCONNECTION, "NHV1_NHV2_1", BranchSide.ONE)

# curves mapping
curves = dyn.CurveMapping()
curves.add_curves("LOAD", ["load_PPu", "load_QPu"])

# simulations parameters
start_time = 0
end_time = 50
sim = dyn.Simulation()
# running the simulation
results =, model_mapping, events, curves, start_time, end_time)
# getting the results
results.curves() # dataframe containing the curves mapped