f97.beERIK SCHMIDT’S WORKSHOP
← All terms

Glossary · Energy industry & energy transition

Asset Management

Asset management grid operator Maintenance electricity grid Investment Equipment Ageing regulation

Asset management refers to the systematic management of technical assets across their entire life cycle. In the power system, this covers lines, cables, transformers, switchgear, protection and control technology, power plants, storage, metering systems and digital infrastructure. It does not mean a single activity. The term combines technical condition assessment, risk management, maintenance, renewal, investment planning and economic prioritisation. The international ISO 55000 series of standards (current version of 2024) describes asset management in general terms: an organisation manages its assets across their life cycle in such a way that they contribute as much value as possible to achieving its objectives. A management system is intended to improve this management continuously. The standard is deliberately general and contains no technical requirements for specific types of assets.

At its core, it is about one question: which assets must be maintained, replaced, reinforced or adapted, and with how much effort, so that the power system remains reliable and affordable? A network operator cannot replace every older item of equipment as a precaution. Nor can it ignore ageing. Failures in the power grid cause consequential costs that can go far beyond the value of the individual item of equipment. In Germany, section 11(1) of the Energy Industry Act (Energiewirtschaftsgesetz, EnWG) obliges operators of energy supply networks to operate, maintain and, in line with demand, optimise, reinforce and expand a safe, reliable and efficient network. This obligation applies insofar as it is economically reasonable. Asset management is the tool with which network operators put this trade-off into practice.

In asset management, an item of equipment is more than an entry in the asset register. It has a technical condition, an expected remaining service life, a function in the network, a probability of failure and a significance for the connected consumers. An example: a transformer in a densely meshed network region has a different risk profile from an identical transformer supplying a rural region with few alternatives. The year of construction alone is not enough for a good decision.

Life cycle instead of individual measures

Technical assets in the power system go through a life cycle: planning, procurement, construction, operation, maintenance, upgrading, replacement and decommissioning. Asset management does not treat these phases separately. A low-cost procurement can become expensive in the long term if spare parts are missing, maintenance intervals are short or the asset does not suit future network requirements. Conversely, a more expensive item of equipment can pay off if it fails less often, can be monitored better remotely or makes later extensions easier.

For this reason, the investment sum alone is rarely what counts. Life-cycle costs, failure risks, maintenance effort, operational restrictions and technical performance are all considered. For network operators, there is the further point that capital costs and operating costs may be treated differently under regulation. The rules of incentive regulation influence whether an operator tends to invest in new assets, operate existing assets for longer or expand operational measures. Anyone who wants to understand this effect must look at the underlying rule.

Asset management works with condition data and assumptions. These include measured values, inspection results, fault statistics, load profiles, thermal stress, moisture in insulation systems, numbers of switching operations and corrosion findings. From these, condition classes, failure probabilities and priorities are derived. Such models do not replace technical responsibility. However, they show which risks arise when many assets age at the same time or are subjected to higher loads.

Distinction from maintenance, network planning and accounting

Asset management is often equated with maintenance. According to DIN 31051, the terminology standard customary in German-speaking countries, maintenance comprises four basic measures: servicing, inspection, repair and improvement. Asset management additionally determines which maintenance strategy makes sense for which asset class. Some items of equipment are serviced at fixed time intervals, others according to condition, and still others according to risk and criticality. A protection device with a central function can therefore be tested more frequently than a less critical item of equipment, even though both are of similar age.

The term must also be distinguished from network planning. Network planning examines how the network must be dimensioned and built in future, for example because of new generation plants, heat pumps, charging infrastructure or industrial connections. Asset management looks more at the existing asset base and its development. In practice, the two interlock. If a cable has to be replaced, the question immediately arises whether it is merely renewed or reinforced at the same time. A pure like-for-like replacement can block or make more expensive a later network extension.

Asset management has only a limited connection with fixed-asset accounting. Accounting knows acquisition values, depreciation and residual book values. The technical condition can deviate considerably from these. A fully depreciated transformer can still operate reliably. A relatively new cable, by contrast, can become conspicuous due to thermal overload, faulty installation or environmental influences. Economic residual value and technical remaining service life are different quantities.

Why asset management is gaining importance in the power grid

Many power grids are under several loads at the same time. Part of the infrastructure dates from expansion phases of earlier decades and is now reaching an age at which renewal decisions accumulate. At the same time, the energy transition is changing how the networks are used. Photovoltaics feeds into distribution networks, wind energy changes the load flows in transmission and distribution networks, and heat pumps and electric vehicles increase local capacity requirements. As a result, it is not only the quantity of energy transported that changes, but also the temporal and spatial load profile. In section 11, the EnWG expressly requires that network operators take into account the requirements of transport, heat, industry and electricity for a greenhouse-gas-neutral supply.

For asset management, power is often more important than annual energy volume. A cable does not age because of the sum of the kilowatt-hours it transports in a year. What is decisive are load peaks, thermal stress, ambient temperature and the duration of high utilisation. A network can appear moderately loaded on an annual average and still reach critical states within a few hours. This distinction is central to investment decisions. It determines whether an item of equipment is replaced, reinforced, monitored or relieved through operational measures.

Digitalisation is also changing the term. Sensor technology, remote monitoring, intelligent secondary substations and digital twins capture the condition of assets more precisely. This improves decisions but creates new dependencies. Anyone working in a more data-based way must also consider data quality, cybersecurity, interfaces, staff qualifications and responsibilities. A poorly maintained condition model can create a false sense of security. A good model, by contrast, reduces blanket precaution and directs money to where the technical risks actually lie. In Germany, under its determination on quality regulation of July 2026, the Bundesnetzagentur (Federal Network Agency) will in future determine and publish key figures annually for electricity distribution system operators. Among other things, they show how far the operators have progressed in digitalisation.

Risk, criticality and security of supply

Asset management works with risk. This means not only the probability of failure, but the combination of probability and consequence. One component may rarely fail but, in a serious case, affect many customers or entail a long repair. Another fails more often but is quickly replaced and has only minor effects. Priorities result from this difference.

For security of supply, this perspective is indispensable. It prevents resources from being distributed according to simple criteria, such as age, visibility or political pressure. A risk-based approach asks which assets can cause bottlenecks, longer interruptions, safety risks or high consequential costs. Redundancy, switching options, available spare parts and repair duration play a major role here. Two assets in identical condition can therefore be treated differently. In regulatory terms, in Germany quality regulation creates incentives to maintain network reliability. In 2026, the Bundesnetzagentur essentially continued this rule.

The term also shows that reliability is not an absolute state. Very high technical security is possible, but it costs money, material, personnel and time. Asset management forces target levels to be named openly. Should an item of equipment be used until the end of its expected service life? Is it replaced earlier if criticality is higher? How much monitoring can replace a precautionary replacement? Such questions are technical, economic and institutional decisions at the same time.

Typical misunderstandings

  • Asset management is supposedly mainly a savings programme: good asset management can reduce costs if it avoids unnecessary measures. However, it can equally justify higher investment if condition data show that an asset base is ageing faster or that a network region will be more heavily loaded in future. It is about a comprehensible allocation of resources to technical risks and system requirements, not about cutting costs at any price.

  • Older assets are supposedly automatically problematic: many items of equipment in the power grid are long-lived. With good design and maintenance, they can be operated considerably longer than originally planned. Age is an indication, not a verdict. What matters are material condition, stress, fault history, environmental conditions, spare-part availability and the role of the asset in the network. Age statistics alone are therefore of little use as a measure of investment needs.

  • A good average condition supposedly means low vulnerability: a network can be sound on average and still contain individual critical nodes. These only become visible when condition data are linked with the network function and the consequences of failure. This is the practical strength of asset management: it considers assets in their function for power transport, voltage maintenance, protection concepts and restoration after faults.

  • Flexibility supposedly makes asset management superfluous: flexible consumers, storage and interventions in feed-in can reduce network loads and postpone investment. In Germany, the former feed-in management (Einspeisemanagement), that is, the curtailment of renewable-energy and CHP plants under sections 14 and 15 of the Renewable Energy Sources Act (EEG), ceased to apply on 1 October 2021. It has been absorbed into the unified congestion management of Redispatch 2.0 under sections 13 and 13a EnWG. Flexibility is an operational or market option. Its availability, controllability and remuneration must be regulated. An ageing transformer does not become reliable because loads are temporarily shifted. Flexible measures complement renewal and expansion when their effect is reliably integrated into planning and operation.

Institutional and economic classification

For network operators, asset management takes place under regulatory conditions. Network charges finance operation, maintenance and investment. At the same time, regulation and efficiency benchmarking are intended to prevent costs from being passed on to consumers unchecked. This creates a field of tension: too little investment can cause later failures or expensive catch-up programmes. Oversized investments raise network costs without corresponding benefit. Asset management provides the technical basis for justifying such decisions.

In Germany, this framework is currently being reorganised. Following a 2021 judgment of the Court of Justice of the European Union, the independent regulatory authority must itself lay down the rules previously contained in the Incentive Regulation Ordinance (Anreizregulierungsverordnung) and the charges ordinances. To this end, the Bundesnetzagentur published determinations on 10 December 2025 in the so-called NEST process. They continue incentive regulation after 2027 for electricity distribution system operators and all gas network operators. The familiar building blocks remain: costs are reviewed for a base year, a revenue cap applies for a multi-year regulatory period, it is adjusted annually for new investments, and there is an efficiency benchmark. Of particular importance for asset management is a new instrument for operating cost adjustment for all electricity distribution system operators. If the supply task grows, costs for personnel or maintenance can also be adjusted accordingly. For transmission system operators, a separate framework with an annual reconciliation of planned and actual costs is envisaged.

Responsibilities are distributed. Strategic asset management sets principles, target conditions and investment programmes. Operational units take on maintenance, inspection and fault clearance. Network planning assesses future load and feed-in scenarios. Regulation, owners and supervision set the financial framework. Conflicts arise where technical possibility, market rule and political responsibility diverge. A network operator can identify a technically sensible measure. However, it can only implement it if approval, financing, personnel, material and construction capacity are available.

Supply chains and skilled workers are also part of the picture. Transformers, switchgear, cables and power electronics sometimes have long delivery times. When many operators renew and expand at the same time, prioritisation becomes more important. In addition to technical need, asset management must therefore also know feasibility, construction times, permitting risks and dependencies between projects. An investment plan that works only on paper does not improve asset condition.

Conclusion

Asset management sharpens the view of the power system because it brings together the existing infrastructure, its ageing and its future stress. It is neither mere maintenance nor mere investment. The term stands for the organised decision on which items of equipment receive which attention and when, which risk is accepted and which costs arise today or later. Without this perspective, the transformation of the power system easily narrows to new-build projects, although reliability is often decided by the right handling of the existing asset base.

Sources

Related glossary entries

Edited by eCMS on 11.11.2026 14:32

© 2026 Erik Schmidt. All rights reserved. Quotations with a link to the source are welcome.