Introducing Essential Critical Infrastructure Services: Operation, Maintenance, and Development of the Electricity Distribution System

This service may not be immediately visible to the end consumer, yet without it, electricity would not reach more than 2 million delivery points in Slovakia—ranging from households and businesses to all public institutions. The electricity distribution system in Slovakia is among the most extensive technical systems in the country. In practice, it includes:

- Tens of thousands of kilometers of power lines;

- Hundreds of thousands of transformer stations across various voltage levels;

- Infrastructure covering the entire national territory—from cities to the most remote villages.

Every day, the energy powering hospitals, industry, transport, and digital services flows through this network.

For better orientation, the position of this essential service within the energy sector, as defined by Annex No. 1 to Act No. 367/2025 Coll. on Critical Infrastructure, is as follows:

Sector: 1. Energy

Subsector: a) Electric Power

Subject Category: Distribution system operators according to § 3 letter b) point three of Act No. 251/2012 Coll. on Energy, as amended.

Essential Services: Operation, maintenance, and development of the electricity distribution system.

Central Authority: Ministry of Economy of the Slovak Republic.

In practice, these entities:

- Ensure the reliable operation of the distribution network;

- Perform maintenance and repairs of the infrastructure;

- Execute investments and network modernization;

- Respond to failures and restore electricity supplies;

- Integrate new energy sources into the system.

Who are the Distribution System Operators?

In Slovakia, this essential service is primarily provided by regional distribution system operators covering specific territories:

- Západoslovenská distribučná, a.s. (Western Slovakia)

- Stredoslovenská distribučná, a.s. (Central Slovakia)

- Východoslovenská distribučná, a.s. (Eastern Slovakia)

These companies manage vast infrastructure, but their role is not merely technical—it is a complex system of management, planning, and development that must keep pace with the growing demands of society and the energy transition.

Why This Service is Critical

The distribution system is where energy security becomes a reality. While electricity is generated and transmitted at higher levels, distribution determines whether it reaches its destination. A failure in the distribution network is not just a local issue; it can lead to:

- Halting supplies to entire cities or regions;

- Threatening the operation of hospitals, schools, and public services;

- Interrupting the operations of industrial enterprises;

- Disrupting financial and digital services.

In other words, without a functional distribution system, the daily life of the state grinds to a halt.

Operation, Maintenance, and Development: Three Pillars of One Service

This essential service stands on three interconnected pillars:

Operation: Involves the daily management of the system, monitoring its status, and ensuring stable supplies. Dispatch management must react in real-time to load changes and unforeseen events.

Maintenance: Regular inspections, repairs, and equipment renewal. Maintenance is often invisible, yet it determines whether failures can be prevented or if large-scale outages occur.

Development: The most dynamic part of the service. The system must constantly adapt to electricity consumption growth, electromobility, renewable energy integration, and digitalization.

Central Authority and Regulation

The Ministry of Economy of the Slovak Republic is the central authority responsible for the energy sector. It sets policy, identifies critical infrastructure subjects, and coordinates the sector during crises. Regulatory oversight is provided by the Regulatory Office for Network Industries (ÚRSO), which monitors pricing, supply quality, and the rules governing distribution companies.

Risks and Challenges

Operators today face an increasingly complex risk environment:

- Extreme weather events (wind, ice, floods, droughts);

- Cyber-attacks on control systems;

- Physical damage to infrastructure;

- Aging networks and investment gaps;

- Growing pressure for decentralized production;

- Integration of unstable renewable sources;

- Shortage of specialized personnel.

Digitalization is a major factor, turning systems into "smart grids" that are more efficient but also more sensitive to cyber threats and systemic failures.

Development as a Condition for the Future

The modernization of the distribution system is a strategic task for both the state and the private sector. Modernization includes:

- Digitalization of network management;

- Implementation of smart grid solutions;

- Strengthening urban and rural capacities;

- Integration of renewable energy sources;

- Increasing overall resilience.

Without these investments, it is impossible to ensure energy security or meet climate and transformation goals.

The Role of the Critical Infrastructure Association of the Slovak Republic

Distribution system operators are on the front lines of energy security. The AKI SR provides a platform where infrastructure operators, technology suppliers, experts, and regulators meet to exchange experience, provide methodical support, and prepare for crisis situations that could impact the entire country.



In the next part of this series, we will look at another key critical infrastructure service essential for daily life and the functioning of the state.