Enabling power generation

Enabling power generation after a start-up is a function in accordance with EN standards. This function is particularly relevant for decentralized power generating plants in order to avoid a disorderly restart after a grid failure and to ensure system stability in accordance with grid connection guidelines. In TwinCAT Power Plant Control, this function is referred to as Restart and is configured via parameters in the Restart group (see Restart).

The function is enabled with the parameter RestartAutomatic = TRUE. After a grid restoration event, the restart mechanism monitors the grid frequency and grid voltage during startup to check the release conditions defined in the standard. The following status signals are available:

• bRestartWait: Indicates that the technical release conditions (frequency, voltage) have been met, but the configured waiting time (RestartDelay parameter) is still running.
• bRestart: Indicates that the waiting time is complete and the power generating plant is starting up.
• bStart: Serves as an enable signal for power generation (e.g. to control a circuit breaker), provided the restart function is enabled.