Ess Reactive Power Voltage Characteristic

  • This controller sets reactive power of an energy storage system in order to keep the grid voltage within an acceptable range.

  • The reactive power set-point depends on the ratio of the grid voltage divided by the configured nominalVoltage parameter.

  • The reactive power set-point is defined as percent of the maximum apparent power of the inverter.

  • The reactive power per voltage ratio is defined by a poly-line graph in the lineConfig parameter. It takes a Json-Array of the following form:

[
   {
      "voltageRatio":0.9,
      "percent":60
   },
   {
      "voltageRatio":0.93,
      "percent":0
   },
   {
      "voltageRatio":1.07
      "percent":0
   },
   {
      "voltageRatio":1.1,
      "percent":-60
   }
]

  • waitForHysteresis parameter: reactive power set-point is not updated more often than the hysteresis time in seconds. Default value is 20 seconds. The purpose of this parameter is to avoid oscillation in grid voltage via frequently setting power.

Source Code