As utilities advance deeper into grid modernisation and continue to see growing levels of Distributed Energy Resources (DERs), two systems frequently dominate the conversation: Advanced Distribution Management Systems (ADMS) and Distributed Energy Resource Management Systems (DERMS).

Both are essential to operating a modern grid but despite their importance, there remains confusion about what each one does, how they relate to one another, and where their boundaries lie.

In this post, we’re breaking down four of the most common misconceptions about ADMS and DERMS that we hear when interacting with utility stakeholders.

1. DERMS is just another part of an ADMS  

Historically, utilities watched standalone systems slowly consolidate into what is now ADMS, and it's natural to assume DERMS will follow the same pattern. But the reality is that DERMS has evolved to solve challenges ADMS was never designed or developed for.

ADMS excels at the operational and often control engineer-driven control of the distribution grid: switching, visibility of faults, volt/VAR, safety, and near real‑time situational awareness.

DERMS was built to address a fundamentally different challenge: the autonomous coordination of diverse, distribution connected, intermittent sources of generation.

Where DERMS brings unique capabilities:

• Flexible/Curtailable Connections and Constraint Management
• Microgrids and Local Energy Systems
• DER Data Management & Visualisation
• EV Charging Dynamic Capacity Management
  

 DERMS is a system that is purpose‑built to co-ordinate a new class of grid-active resources, managing complexity at an unprecedented scale. 

2. It’s better to stick with the same supplier for ADMS and DERMS

For many utilities, the instinct is to minimise integration risk and avoid adding another system to an already complex grid operations ecosystem. Adopting any new platform can feel daunting, especially one as critical as DERMS, but this perception can unintentionally hold utilities back.

A purpose‑built DERMS is architected from the ground up to deal with:

• High DER scale
• High variability
• Vendor heterogeneity
• Advanced optimisation and forecasting
• The need to manage devices outside the utility’s direct control
• Deliver secure and seamless integration to existing and future utility software solutions

DERMS doesn’t replace ADMS, it complements it. While ADMS excels at supervised network monitoring and control, DERMS is purpose‑built to manage distributed energy resources at scale, delivering the precision, flexibility and interoperability that ADMS platforms weren’t designed to provide.

The strongest outcomes come from working with a vendor whose sole focus is DERMS: building deep optimisation, forecasting and control capabilities and integrating seamlessly with ADMS and Flexibility Trading Platforms. This approach allows utilities to leverage the best of each system, without forcing one platform to stretch beyond its core strengths.

3. My ADMS can already manage assets on the network, it’s easy to extend that to DER

The challenge is that DERs do not behave like traditional network assets and ADMS platforms were never designed to manage this new class of resources, especially not in real-time, autonomously, at scale or outside the utility’s direct operational perimeter.

ADMS has some key limitations when it comes to DER management:

• No real‑time DER control:
  ADMS can’t unlock hosting capacity or support flexible interconnection because it lacks fast, device‑level control of DERs.
• Poor visibility of behind‑the‑meter DERs:
  BTM solar, batteries and EVs typically sit outside the ADMS telemetry world, leaving operators blind to major load/generation changes.
• Cybersecurity constraints:
  ADMS is secured inside the OT perimeter; it’s not designed to connect directly to internet‑facing customer devices or cloud APIs.
• Limited ability to interface with markets and external platforms:
  ADMS has fewer flexible integration patterns when it comes to connecting with flexibility markets, aggregators or VPP ecosystems.
• Hard to coordinate with Demand Response for forecasting and optimisation:
  Without DERMS, utilities struggle to run preventative and corrective DER actions in a coordinated way.

Why DERMS is needed:

DERMS is built specifically for real‑time DER visibility, secure communication with external devices and integration with programs, markets and other utility systems. It doesn’t replace ADMS, it extends it, enabling smarter, more coordinated grid operations as flexibility and market access requirements grow.

4. DERMS can’t work standalone, you need to integrate it to ADMS anyway, so it might as well all come from the same supplier

Even without an ADMS, a modern DERMS can still:

• Ingest SCADA data and utility telecoms feeds
• Use real‑time DER data to perform key use cases
• Support non‑wires alternatives or flexibility dispatch
• Extend network hosting capacity
• Enable Curtailable Connections
• Provide voltage management and other DER‑enabled grid services

For utilities at an early stage of their flexibility journey, DERMS can be deployed as a standalone solution and still produce meaningful operational and planning benefits. The best value is realised from a system-of-systems approach, DERMS works perfectly well on its own but even better as part of a wider ecosystem.

Find out more information on Strata Grid, the only DERMS software to combine grid and market optimisation with real time control here: https://www.smartergridsolutions.com/products/strata-grid