Maturity status | Beta |
This article explains how DSO signaling via an external controller works, what the hardware requirements are, and how the EMS applies the power limitation.
What is DSO signaling with an external controller?
DSO signaling allows the EMS to receive active power limitation signals from the Distribution System Operator (DSO) via a communication gateway ("external controller"). The EMS applies the received limitation and reports Grid Connection Point (GCP) measurements back to the DSO, enabling VDE 4110 compliant communication.
DSO signaling requires Dynamic Load Management (DLM) and a grid meter at the GCP. SLM and multi-GCP setups are not supported.
How does DSO signaling work?
The external controller receives an active power limitation from the DSO as a percentage (0–100%) of the configured maximum power import limit. A value of 100% means no restriction is applied.
The EMS:
Reads the active power limitation input from the external controller
Calculates the effective power limit: configured maximum import limit × received percentage
Applies this as a total power limit
Reports GCP measurements back to the external controller
Important limitations:
Only active power limitation is supported — reactive power control is not currently available but is planned for a future release
Reporting of available active power back to the DSO is currently only supported for alpitronic Hyperchargers
What are the hardware requirements for DSO signaling?
Exactly one grid meter with active and reactive power measurements at the GCP
Exactly one external controller (VDE 4110 gateway) is integrated and can communicate with the EMS via Modbus
Load management is configured and the EMS is active
How do I enable DSO signaling?
There is no user interface or API to configure this feature yet — contact gridX to enable it.