▸ Resilient Energy Systems as the Foundation of State Operational Capability

A military command center coordinates a large-scale crisis situation. Multiple authorities are involved, deployment forces are relocated, and situational data from various sensor and information systems converge. Operational command depends on the continuous processing of large amounts of data—communication systems, satellite connections, IT infrastructure, and situational awareness systems must remain permanently available.

Modern command and control relies on digital networking. Data is captured, processed, and distributed in real time. Decisions at the operational level are directly dependent on stable technical infrastructure. Without a functioning energy supply, these systems lose their operational capability within a very short time.

Suddenly, a regional substation fails. Within seconds, protective mechanisms in the power grid react, and load flows change. Part of the supply collapses, and further grid segments are automatically shut down to prevent damage.

What initially appears to be a technical incident develops into a systemic disruption. Communication networks lose their stability, data centers switch to emergency operation, and individual facilities fail completely.

The military command center can maintain operations in the short term using emergency power systems. However, the existing systems are not designed for longer periods of autonomous operation. Spare parts are missing, fuel supply is uncertain, and critical systems compete for limited energy.

Operational capability begins to decline.

Modern societies are dependent on stable energy supply to an unprecedented degree. Digital infrastructures, communication systems, transportation, industry, and government institutions form a highly interconnected system.

This interconnectedness increases efficiency and performance—at the same time, it creates mutual dependencies. If the energy supply fails or becomes unstable, multiple critical systems come under pressure simultaneously.

The central challenge, therefore, is to design energy supply systems so that they remain functional even under extraordinary stress.

The answer to this is: resilience.

The energy supply of modern industrialized nations has been developed over decades primarily with efficiency in mind. Large central power plants, highly optimized grid infrastructures, and complex supply chains enable a stable and cost-effective supply.

However, increasing digitalization and networking create new systemic risks. Energy systems are now closely linked with communication networks, control software, and international supply chains.

This networking enhances the performance of the systems but simultaneously increases their vulnerability to disruptions.

A local failure can develop into a large-scale disruption within a short time. The technical literature refers to this as cascading effects. Here, a disruption spreads across multiple systems, leading to a chain reaction.

Particularly problematic are single points of failure—components or dependencies whose failure disproportionately impairs overall functionality. These are not only technical nodes (e.g., individual substations, control systems, or communication links) but also organizational and logistical bottlenecks: unclear escalation paths, unavailable spare parts, missing standards for connections and interfaces, or supply chains that are not resilient in crises. In hybrid situations, such bottlenecks are deliberately targeted because they achieve high systemic impact with minimal effort.

Energy systems today are not only vulnerable to disruptions but are also strategic targets. Cyberattacks on control and management systems, espionage in supply chains, sabotage at sensitive nodes, and disinformation aimed at undermining trust in supply and institutions are part of a hybrid threat landscape. These forms of attack rarely act in isolation. Their impact arises from timing, combination, and exploitation of dependencies—precisely where complex systems have their weakest points.

Germany is currently in a security policy phase between peace and military confrontation. Crisis and defense preparedness are increasingly becoming part of regular state operations.

The Operations Plan Germany describes the strategic framework for this: national and alliance defense, international crisis management, and national crisis and response management. All three pillars require a secure and resilient energy supply.

“The energy demand in the military of the future is at an unprecedented level, solely due to the digitalization of the armed forces and modern hybrid warfare.”
Colonel, Dipl.-Ing. Norbert Vetter (Bundeswehr)

The term resilience is often understood too narrowly in the context of energy supply—and too often equated with redundancy. Redundancy means that a capability can be replaced by another component in the event of a failure, often through additional or alternative technology. This is important but not sufficient.

In practice, systems fail not only due to missing replacement components but also due to dependencies: lack of fuel logistics, unclear responsibilities, untested switching processes, insufficient interoperability between subsystems, or missing standards. A technically redundant system can still fail in a crisis due to these factors.

The practical implications of this distinction are detailed in our article: What Resilience Really Means and Why Quantitative Redundancy Isn't Enough.

Resilience describes the ability of a system to detect, absorb, adapt in real time, and remain seamlessly operational in an emergency.

A detailed analysis and strategic approaches for operators of critical and military infrastructures can be found in the Whitepaper “Energy Security – Strategies for Protecting Critical Infrastructures.”

Resilience is thus a holistic concept that combines technical, organizational, and regulatory dimensions. Redundancy is a necessary foundation. Resilience describes the ability of the overall system to remain functional even under disruption.

100% security is inefficient. The key is to prioritize critical functions and integrate them in such a way that the overall system remains controllable even during disruptions.

Resilience in the energy sector does not arise from individual measures but from the interplay of multiple system dimensions. It results from the interaction of various structural and organizational factors. An energy system is considered resilient if it remains functional even under extraordinary stress and can adapt to changing conditions.

A robust energy infrastructure therefore encompasses several dimensions that collectively ensure the stability of the overall system.

Technological resilience describes the ability of a system to compensate for technical failures and utilize alternative supply paths.

A central aspect is the diversification of energy sources. Systems that depend solely on a single energy source or technology have an increased risk of failure. The combination of various technologies—such as renewable energy sources, energy storage, and backup systems—significantly enhances the stability of the overall system.

Equally crucial is the ability to form island grids. Critical facilities must be able to disconnect from the overarching power grid in a crisis and maintain their energy supply autonomously.

Technological solutions alone do not ensure crisis resilience. Organizations must be able to respond quickly and systematically to unexpected events.

This includes clearly defined emergency plans, decision-making structures, and regular crisis exercises under realistic conditions. Responsibilities must be clearly regulated so that no delays occur in an emergency.

Resilience is therefore not only a technical characteristic of a system but also an organizational capability.

Regulatory frameworks also play a decisive role in the stability of energy systems.

Binding safety standards, technical norms, and legal requirements create the foundation for uniform protective mechanisms within critical infrastructures. Without such standards, fragmented solutions emerge that can create new systemic risks in the long term.

A clear regulatory structure supports operators in integrating security requirements into their infrastructure planning at an early stage.

Investments in resilient infrastructure are often primarily viewed from a cost perspective. In reality, however, they are strategic investments in the long-term stability of the state and economy.

Failures of critical infrastructures can cause significant economic damage and simultaneously impair the functionality of state institutions. Against this backdrop, resilience is not an additional burden but a central component of sustainable infrastructure planning.

Resilience ultimately also has a societal dimension.

The expansion of energy infrastructure—such as power lines, energy facilities, or storage technologies—requires societal acceptance. Without this acceptance, delays in infrastructure projects arise that can endanger the long-term stability of the energy supply.

Resilience is therefore also a question of political governance and societal responsibility.

The overall energy supply system in critical infrastructures follows the 'System of Systems' principle: a group of independent, complex subsystems interacts in such a way that a higher-level function emerges collectively. The key point is that the subsystems remain operationally independent but are integrated in a way that creates robustness, scalability, and adaptability in their interaction. SoS architectures are designed to evolve. They can be further developed with changing threats, technologies, and requirements.

The development of such system architectures requires continuous technological advancement and interdisciplinary research in the fields of energy systems, digitalization, and security architectures. An overview of current projects and research areas can be found in the Research and Development section of HDC.

In this context, interoperability is not a 'nice-to-have' feature but a prerequisite for operational and supply capability. A networked, scalable energy supply must be planned as a holistic system—with common, recognized standards and specifications. A prerequisite is a common technical 'denominator.' Identical or compatible components, standardized connections, and a central, open system architecture for control and monitoring reduce logistical effort and increase availability and spare part capability. Interoperability prevents decentralized solutions from becoming isolated islands that cannot be integrated into a resilient overall system in an emergency.

Why data sovereignty is a vital security asset—and why it transcends simple IT management—is detailed in our article: Data Sovereignty Is More Than an IT Issue – It’s Critical for Security.

The decisive advantage of this architecture lies in its flexibility. If a single subsystem fails, other systems can partially take over its function.

Modular energy systems can also be more easily expanded or adapted to new requirements. This creates an infrastructure that is not static but can continuously evolve.

The complexity of a System of Systems can only be partially captured with traditional planning approaches. Decisions about infrastructure investments or security measures must today be made based on extensive data analysis.

Simulation technologies are therefore becoming increasingly important.

To learn how organizations systematically use these scenarios to detect supply risks early, read our article: Anticipating the Energy Crisis: Using Scenarios to Secure Resilient Supply.

Digital twins enable the virtual representation of real energy systems. In such models, energy flows, load distributions, and system responses under different conditions can be analyzed.

This provides a transparent overview of the functioning of complex infrastructures.

Simulations make it possible to realistically examine various crisis scenarios, including:

• large-scale power outages

• cyberattacks on energy infrastructure

• disruptions in supply chains

• extreme weather events

Through such scenario analyses, systemic weaknesses can be identified early. At the same time, robust decision-making bases for investments and organizational measures are created.

To see which concrete signals point toward imminent supply gaps, read our dedicated piece: Early Indicators of Supply Gaps

Simulation thus bridges the gap between theoretical analysis and practical implementation of resilience strategies.

Modern simulation platforms make it possible to realistically model complex energy systems and systematically analyze various crisis scenarios.
An example of this is the THORIUM platform for simulating resilient energy systems, which allows energy infrastructures to be modeled, scenarios to be played out, and strategic decisions to be well-prepared.

Certain facilities or areas within facilities must remain operational even during large-scale disruptions. This includes, in particular, security-relevant facilities, government agencies, data centers, and medical facilities.

For such sites, conventional emergency power supply is often insufficient.

Critical sites must be able to immediately disconnect from the public power grid in the event of disruptions and maintain their energy supply independently.

This capability is known as island grid operation. It is based on the combination of various energy sources, storage technologies, and intelligent control systems.

A central element of resilient energy systems is prioritization—not only between facilities but also within a facility. Autonomy is only operationally meaningful if it is clearly defined which functions must continue to operate under all conditions and which loads can be temporarily reduced or interrupted. Autonomy does not mean complete energy independence but the ability to operate independently from the grid for defined critical functions for a limited time.

This is where the Critical Core Logic comes into play: The Critical Core includes those functions that directly define security and supply capability and therefore receive the highest priority in autonomy and resilience planning. A hospital illustrates this principle: the intensive care unit and central medical technology typically belong to the Critical Core and require robust autonomy and resilient supply paths. Cold chains can—depending on design and buffer—be temporarily interrupted without causing immediate major damage; they thus belong to a secondary supply layer. Catering or comfort loads are in many scenarios part of the 'Outer Shell': relevant for normal operation but not for the immediate maintenance of core capability.

The strategic benefit of this logic is that it combines resilience with efficiency. Instead of securing 'everything always,' energy is distributed in crisis mode so that core functions endure and the system remains controllable.

International analyses show that a relatively small portion of infrastructure components is responsible for the majority of system stability.

Approximately 30 percent of critical infrastructure components significantly determine the stability of the overall system. Resilience strategies therefore focus on those components whose failure can trigger systemic chain reactions. These particularly relevant elements must be prioritized for protection and designed to be resilient.

Strategic prioritization enables the targeted use of resources. Instead of securing all systems equally, planning focuses on those facilities whose failure would have the greatest impact on the state and society.

These include, in particular, central energy infrastructures, communication networks, and facilities of state security agencies.

Energy systems today must fulfill multiple goals simultaneously: economic efficiency, sustainability and climate goals, supply security, and—under security policy conditions—autonomy in crises. These goals do not automatically conflict, but they create trade-offs if pursued without an overall architecture.

Resilience is therefore a strategic question. The 'sweet spot' emerges where (1) critical functions are consistently prioritized, (2) systems are designed to be modular and decentralized, (3) interoperability through standards and open architecture ensures integration, and (4) simulation provides robust decision-making bases. This combination prevents two typical pitfalls in infrastructure planning: on the one hand, monolithic efficiency systems with fragile bottlenecks, and on the other, decentralized individual solutions that do not work together in an emergency.

Resilience does not arise from individual measures but from a structured development process.

The first step is a comprehensive analysis of the existing energy infrastructure. All relevant components are recorded, and their interdependencies are examined.

The goal is to identify critical weaknesses in the system at an early stage.

Based on this analysis, realistic crisis scenarios are simulated. This makes it possible to visualize potential system responses and develop alternative courses of action.

Simulation thus creates a solid foundation for strategic decisions.

In the next step, modular energy systems are developed that integrate various energy sources and storage technologies.

These systems reduce dependencies on individual components and increase the adaptability of the infrastructure.

Resilience is not a one-time achievement. Energy systems must be regularly reviewed, tested, and adapted to new threat situations.

Only a continuous learning process ensures long-term stability.

Modern societies are dependent on stable energy supply to an unprecedented degree. Digital infrastructure, security agencies, military structures, and economic production systems form a complex network of mutual dependencies.

A failure of the energy supply can therefore have far-reaching consequences for the state and society.

Ensuring resilient energy systems is therefore not merely a technical task. It is part of state security preparedness.

Resilient energy systems are not a technical option; they are a prerequisite for state operational capability.

Those who strategically plan, simulate, and prioritize energy infrastructure create the foundation for state institutions to remain operational even under crisis conditions.

In the whitepaper “Energy Security – Strategies for Protecting Critical Infrastructures”, we show how resilient energy systems can be built and what role simulation, System-of-Systems architectures, and autonomy play in this.

With the Resilience Checklist for Energy Infrastructures, you can check in just a few minutes how well your site is prepared for disruptions or crisis situations.