ISIE Consortium

Partners: Common Futures (lead partner), Zenmo, CE Delft, TU Eindhoven, Resourcefully

Funders: Netherlands Enterprise Agency, Topsector Energie

Policymakers and system stakeholders rely on multiple energy system models that often produce differing results. This lack of comparability creates uncertainty in infrastructure planning, flexibility deployment, and long-term energy policy decisions. Not by developing a new model, but by reusing, standardizing, integrating, and reporting on existing models.

ISIE stands for Instrumentarium and Standards for Integrated Energy System Analysis. It aims to make modeling local flexibility and infrastructure easy, standardized, and open. It follows a bottom-up approach that combines existing models, enabling progress toward an effective energy transition and increasing resilience, energy security, and demand flexibility.

Three expected results of the project are:

1. Standardization
Defining standardized input scenarios and interfaces that take flexibility, infrastructure, and technological development into account.

2. Instruments
Running the scenarios on several established models that simulate local flexibility and infrastructure using a bottom-up approach. These models are tested against each other and compared and explained. They are then coupled with PyPSA to examine the effect of local flexibility on the national and European energy system.

3. Advice
Identifying which steps are necessary to ensure and implement local flexibility.

By increasing transparency and standardization, ISIE provides policymakers with clearer, more reliable insights. This reduces uncertainty, supports evidence-based decision-making, and improves coordination in infrastructure and flexibility planning.

ISIE transforms how data-driven energy planning is applied. The project delivers more precise and comparable information, clarifies pathways for local flexibility, and contributes to a more resilient, secure, and cost-effective energy system.

Project Aims

OET’s aim: A harmonized overview and recommendation document that describes how Dutch standards for energy system modeling can be structurally aligned with European frameworks (such as CIM and CGMES), thereby strengthening interoperability and knowledge exchange.

OET’s aim: Customize a PyPSA-Eur-based model to include a larger number of regions in the Netherlands, allowing calculation on the high-voltage grid in greater detail.

Introduction to the ISIE consortium

Project Team

Dr. Jonas Hörsch

Senior Energy System Modeler

Dr. Harry van der Weijde

Head of Research & Market Development