Elektro Celje is developing the advanced Flexis platform within the SEEDS project, designed for the systematic and dynamic procurement and activation of flexibility services in the distribution network. In the future, Flexis will serve as a central digital tool for flexibility management, enabling distribution system operators to respond effectively to the challenges of the modern power system. It will be designed as a comprehensive system that provides transparent procurement, ranking, activation, and settlement of flexibility, which will be essential for managing loading conditions, voltage profiles, and other network constraints.

The distribution network will continue to face rapidly increasing loads in the coming years. In addition to the growing number of electric vehicles, widespread distributed generation, especially small rooftop photovoltaic systems, and heat pumps will have a significant impact, as they change consumption patterns and introduce new types of operational extremes. In this context, Flexis will enable centralized and automated utilization of flexibility from various sources, allowing distribution operators to better exploit existing network capacities and postpone necessary investments.

The platform will support the publication of flexibility tenders, provider registration, offer collection, and the formation of a merit order list, ensuring a transparent and economically optimal selection of services. Within the SEEDS project, Elektro Celje will also procure flexibility directly from the aggregator Petrol, which will aggregate flexible sources such as EV charging stations, solar power plants, and heat pumps. This will allow the platform to be tested under real operating conditions during development, enabling validation of processes, data flows, and activation models.

Flexis will support both predictive and corrective activations. This means that flexibility may be activated in advance, based on forecasts of load and generation, or in real time when data systems detect that critical thresholds have been exceeded. Special emphasis will be placed on addressing voltage rises caused by distributed generation and on managing peak loads resulting from EV charging infrastructure and heat pumps.

Close integration with Elektro Celje’s big data platform called LAMBDA will enable near real-time monitoring of transformer substation loading and network element conditions. Based on this information, Flexis will trigger flexibility activations manually or automatically, engaging different sources depending on network needs, from reducing EV charging to adjusting heat pump operation or limiting PV generation output.

A key advantage of Flexis will be its connection to the national centralized entry point (EVT), which will provide standardized exchange of tenders, contracts, and activations. This will allow the aggregator Petrol to offer flexibility to all distribution operators through a single system, while ensuring Flexis remains interoperable and compliant with Slovenian and European standards, including the CIM data model.

Flexis will also support monitoring of executed activations, automatic verification of contract compliance, impact analysis, and preparation of reports for operational, planning, and market needs. This will provide a comprehensive overview of flexibility performance and enable further development of business models based on insights gained from the SEEDS project.

In the future power system, Flexis will represent a key infrastructure component for local flexibility markets and will support the efficient integration of distributed energy resources into the day-to-day operation of the distribution network.