ADMS

An ADMS is the control-centre platform operated by a distribution system operator (DSO) for managing the lower-voltage distribution network — primary distribution at 132 kV or 33 kV, secondary at 11 kV, and the low-voltage transformers that feed streets and premises.

What it does

• Network optimisation — voltage/var control, loss minimisation, transformer load balancing across feeders.
• Outage management — fault location, isolation, and service restoration (FLISR), customer-call correlation, crew dispatch.
• Switching support — interlocked sequencing of breaker and disconnector operations for planned and emergency work.
• DER integration — visibility and control over distributed energy resources (rooftop solar, batteries, EV chargers, demand-response devices) whose bidirectional flows the original 1960s distribution design never anticipated.
• State estimation at distribution scale — increasingly necessary as DER penetration makes the radial network behave more like a meshed one.

Where it sits

The ADMS reads its data from SCADA, which polls RTUs at distribution substations across the WAN. Vendor platforms include GE PowerOn Advantage, Hitachi Energy Network Manager, and Siemens Spectrum Power.

ADMS vs EMS

ADMS is the distribution counterpart of EMS. The DSO transition — driven by DER integration, regulatory pressure for observability, and increasingly active distribution networks — is the reason ADMS is the bigger investment story in many countries today: distribution has historically been less automated than transmission, and there is more catching-up to do.

Deployment shape

Like EMS, ADMS typically runs on bare-metal infrastructure in hardened control-centre data halls. Where the vRTUs feeding it are virtualised, they are usually co-located on a hypervisor cluster in the same data hall — which concentrates blast radius in a way the substation-edge model didn’t.