Coordinated Security Analysis


Watch the video above for a basic explanation of the service (provided by ENTSO-E and Coreso).



The Coordinated Security Analysis (CSA) gives Transmission System Operators (TSO) an unprecedented overview of regional security and cross-border interdependencies at a time where power systems are under increased pressure to deliver on the transition to renewable energy.

The goal is to simulate the behavior of the combined Nordic power systems under a variety of operating states and ensuring that cost-effective remedial actions are agreed upon all affected parties whenever needed.

This service is provided by each of the 6 Regional Coordination Centers (RCC) to European TSOs according to common methodologies. Within this framework, Nordic RCC serves the four Nordic TSOs: Energinet, Svenska Kraftnät, Statnett and Fingrid.


The CSA methodology and later amendments constitute the foundation of the service defining common concepts, processes and timings across the European continent in order to harmonize the security analysis for power systems.

In addition to the CSA methodology, the Nordic Regional Operational Security Coordination (NROSC) part of the Nordic System Operation Agreement SOA defines further details and procedures for the local implementation of the CSA service in the Nordic context.


The first version of the Nordic CSA service will go live in 2024 strengthening the cooperation between Nordic TSOs and paving the way for advanced operational support in the future.

At the core of the CSA process in scope for v1.0 is the solution of a N-1 contingency analysis executed on the Nordic D-1 Common Grid Model (CGM). As the D-1 CGM contains load and production schedules resulting from the day-ahead market clearing, the CSA process provides a way to validate whether the market solution is feasible in terms of power system operational limits, while fulfilling conventional security criteria.

CSA v1.0 will cover only a part of CSAm and NROSC requirements, which will be included in later versions of the service. Other aspects such as Remedial Action Optimization (RAO), Probabilistic Risk Assessment (PRA) and intraday processes will be part of future implementations.