Digital interoperability and cybersecurity standards establish common requirements for how power-system data is structured, exchanged and protected across organizations, software applications and digital platforms. As electricity networks become more interconnected and digitally managed, transmission and distribution operators increasingly rely on data exchanged across organizational and national boundaries and on systems supplied by multiple technology vendors. Interoperability standards define common information models, data formats and exchange rules so that different applications can interpret and use the same grid information consistently, reducing reliance on bespoke interfaces and supporting coordinated planning and operation. Cybersecurity standards provide the complementary protection layer, establishing common requirements for cybersecurity risk assessment, information protection, monitoring, incident reporting and response across interconnected electricity-system actors. Together, these standards allow digital systems to exchange information consistently while establishing shared expectations for how data, applications and connected infrastructure are protected. Implementation requires more than publishing technical specifications – common requirements need to be embedded in software, operational processes and procurement, supported by conformity and interoperability testing and monitoring, and updated as technologies, system dependencies and cyber risks evolve.

Main Outcomes of the Solution

• Reliability & Flexibility: Consistent data exchange across applications and operators, supporting coordinated system planning and operation. 
• System Resilience: Common approaches to cybersecurity risk management, monitoring, incident reporting and crisis response across interconnected systems. 
• Institutional Efficiency & Transparency: Standardized information models and exchange processes that reduce reliance on bespoke interfaces and improve consistency of data exchange.

Key Deployment and Scaling Factors

1. Define common information models, exchange formats and implementation rules so that organizations and software applications interpret information consistently.
2. Maintain data quality and governance processes to support consistent implementation and reliable exchange of information across systems.
3. Conduct interoperability and conformity testing to verify that different implementations of the same standard can exchange and use data correctly.
4. Apply cybersecurity requirements across relevant organizations, technologies and suppliers, with responsibilities proportionate to identified cyber risks, including supply chain and third-party risks.
5. Establish common processes for cybersecurity risk assessment, information sharing, incident reporting and crisis management so that threats affecting multiple actors can be identified and addressed in a coordinated manner.
6. Regularly maintain and update interoperability and cybersecurity standards as grid processes, software, technologies and cyber risks evolve.

Case studies

ENTSO-E (2017-present), European Union

ENTSO-E developed the Common Grid Model Exchange Specification (CGMES) to support interoperable exchange of power-system models between transmission system operators and the software applications used for system operation and development across Europe. CGMES defines a common framework for exchanging grid-model data and was incorporated into International Electrotechnical Commission specifications in 2017, with subsequent editions published as international standards. 

ENTSO-E complements the specification with a conformity assessment framework and interoperability testing, allowing applications from different suppliers to demonstrate implementation of assessed CGMES requirements. Its public conformity registry includes applications from multiple technology suppliers and system operators. ENTSO-E notes that conformity declarations and attestations apply to the functionality assessed and do not by themselves confirm that an application covers all requirements of a particular business process.

Interoperability testing has continued as CGMES and associated network-code profiles evolve. Tests in 2025 and 2026 covered data exchange for Regional Coordination Processes, with a focus on coordinated security analysis. CGMES therefore provides a common data foundation through which different applications can exchange grid models for coordinated operational and planning processes.

European Commission (2024), European Union

In 2024, the European Commission adopted the EU Network Code on Cybersecurity for the electricity sector – Commission Delegated Regulation (EU) 2024/1366 – establishing sector-specific cybersecurity rules for cross-border electricity flows. The regulation establishes a common framework covering minimum cybersecurity requirements, cybersecurity risk assessment, monitoring, reporting, information sharing and crisis management. It also includes provisions addressing supply chain risks and cybersecurity controls.

The framework provides for the identification of high-impact and critical-impact entities whose activities can affect cross-border electricity flows, alongside responsibilities for competent authorities, ENTSO-E, the EU DSO Entity and other European institutions. It establishes recurring cybersecurity risk assessments at entity, Member State, regional and Union levels and processes for identifying high-impact and critical-impact processes and entities. Rather than relying solely on independent approaches among interconnected electricity actors, the Network Code establishes common processes for assessing and managing cybersecurity risks that can affect electricity-system operation across borders.

References:

1. CIM Conformity and Interoperability
2. Delegated regulation - EU - 2024/1366 - EN - EUR-Lex