{
  "version": "v0.1",
  "hils": [
    {
      "name": "power_grid_hil",
      "warmup_s": 2.0,
      "init": {
        "bus_voltage": 230.0,
        "bus_frequency": 50.0,
        "generator_power": 0.0,
        "load_power": 0.0,
        "grid_stable": 1,
        "generator_cmd": 0,
        "generator_setpoint": 0.0,
        "load_demand": 500.0
      },
      "params": {
        "nominal_voltage": 230.0,
        "nominal_frequency": 50.0,
        "voltage_tolerance": 10.0,
        "frequency_tolerance": 0.5,
        "generator_max": 1000.0,
        "load_sensitivity": 0.01
      },
      "tasks": [
        {
          "type": "loop",
          "name": "grid_dynamics",
          "dt_s": 0.1,
          "actions": [
            {
              "if": "generator_cmd > 0.5",
              "then": [
                {"set": ["generator_power", "clamp(generator_setpoint, 0, generator_max)"]}
              ],
              "else": [
                {"set": ["generator_power", "0"]}
              ]
            },
            {"set": ["load_power", "load_demand"]},
            {
              "set": ["bus_frequency", "nominal_frequency + (generator_power - load_power) * load_sensitivity"]
            },
            {
              "set": ["bus_voltage", "nominal_voltage * (0.95 + 0.1 * (generator_power / max(generator_max, 1)))"]
            },
            {
              "if": "abs(bus_frequency - nominal_frequency) < frequency_tolerance and abs(bus_voltage - nominal_voltage) < voltage_tolerance",
              "then": [
                {"set": ["grid_stable", "1"]}
              ],
              "else": [
                {"set": ["grid_stable", "0"]}
              ]
            }
          ]
        },
        {
          "type": "playback",
          "name": "load_variation",
          "dt_s": 1.0,
          "target": "load_demand",
          "profile": {
            "kind": "gaussian",
            "height": 500.0,
            "mean": 0.0,
            "std": 50.0,
            "entries": 100
          },
          "repeat": true
        }
      ]
    }
  ]
}