Virtualization of Protection and Control for the Digital Transformation of Power Grids

Why Substations Need to Evolve

The large-scale integration of renewable energy sources, power electronics, and increasing grid interconnection are transforming power system operation. However, many critical protection and control functions remain tied to dedicated hardware, creating a growing gap: the grid is evolving, but protection architectures are not keeping pace.

The limitation is no longer in the grid itself—it is in the hardware. With traditional approaches, certain advanced functionalities can no longer be effectively deployed. Conventional architectures present clear constraints:

• Slow Evolution

  Enhancements depend on lengthy hardware replacement cycles, delaying the adoption of innovation and new capabilities.

• Limited Flexibility for Emerging Scenarios

  Difficulty adapting protection schemes to evolving operating conditions, including new AC/DC grid dynamics, bidirectional power flows, and increasingly complex network configurations.

• Vendor Dependency

  Proprietary, closed architectures place technological evolution in the hands of third parties and limit interoperability between systems and manufacturers.

• No Path for New Capabilities

  The practical inability to deploy advanced functionalities—such as adaptive or predictive protection schemes—without physically replacing equipment.

Decoupling Critical Functions from Hardware

Virtualization is the answer: moving protection and control logic into software running on deterministic real-time computing platforms. This enables the same functions to be executed on:

• Repurposed conventional IEDs that support virtualization.
• vPAC (Virtual Protection, Automation & Control) servers deployed at the substation level.
• Containerized infrastructures, such as microservices running on edge computing platforms.
• Next-generation hybrid AC/DC digital substation architectures.

By decoupling critical functions from hardware, utilities can maintain all reliability and timing requirements while unlocking the ability to evolve and modernize their networks. In other words, substation intelligence no longer depends on a specific physical device—it becomes software-defined, scalable, updatable, and orchestrable.

Virtualization is not simply about moving functions into software. It is about ensuring they continue to respond when it matters most—with the same reliability as conventional protection systems.

Advanced Engineering for Risk-Free Virtualization

At CIRCE, we take a comprehensive approach to protection virtualization. We develop and adapt protection and control algorithms for software environments while ensuring full functional equivalence with conventional systems.

Deterministic Latency

Virtual protection functions achieve the same millisecond-level response times as physical relays, meeting the stringent requirements of real-time operation.

• IEC 61850 Integration

  Full support for GOOSE, MMS, Sampled Values, and other digital substation protocols ensures seamless interoperability with existing SAS infrastructures.

• Multi-Vendor Architecture

  Hardware-agnostic software that can run on edge platforms, standard servers, or IEDs from different manufacturers. You retain technological freedom and avoid vendor lock-in.

• Built-in OT Cybersecurity

  A secure-by-design approach with integrated cybersecurity measures that protect virtualized functions against potential threats.

  Our priority is to preserve safety and reliability. For every project, we identify and mitigate critical aspects such as sample synchronization, network redundancy, fail-safe mechanisms, and system resilience, ensuring a seamless transition to virtualization without impacting operations.

How We Guarantee Reliability in Critical Environments

Before deploying any solution in a live substation, we thoroughly validate its behaviour. CIRCE operates a Real-Time Digital Simulation (RTDS) laboratory, where every virtualized function is tested under conditions equivalent to those of the target network.

• Hardware-in-the-Loop (HIL) Simulations

  We recreate the real operating environment through a digital twin of the substation, injecting faults and electrical events to evaluate the performance of virtual protection and control functions under extreme conditions.

• Realistic Integration Testing

  Virtual protection functions are connected to real physical equipment in the laboratory to verify interaction with field devices, including sensor sampling, tripping operations, and communication systems.

• Tuning and Optimization

  Solutions are refined iteratively until selectivity, performance, and resilience requirements are fully achieved. Any issues are resolved before deployment in the field.

  This pre-deployment validation approach minimizes risk. Rather than experimenting on your network, we verify every aspect in a controlled environment—ensuring your project is implemented with confidence, not uncertainty.

Who Is This Solution For?

• Protection and Control System Manufacturers (OEMs)

  Organizations seeking to incorporate virtual protection technologies into their product portfolio. By collaborating with CIRCE, manufacturers can develop and validate software-based functionalities more rapidly, leveraging our combined OT/IT expertise and extensive experience with multi-vendor prototypes.

• Grid Operators (TSOs/DSOs) and System Integrators

  Organizations looking to modernize substations through a safe and progressive transition. Our approach enables them to evaluate virtualization technologies with minimal risk and implement adoption strategies at their own pace. The result is a more flexible, upgradeable grid with reduced hardware dependency and enhanced operational capabilities.

  Ultimately, this solution is designed for organizations leading the digital transformation of power networks—from forward-thinking utilities to manufacturers committed to shaping the future of the digital substation.