First published in issue 3/ 2026 of IN Power

Metals producers are under pressure to automate, decarbonize and digitalize, but none of these priorities can be separated from the basic requirement to keep the plant running. The steel industry, for example, still accounts for roughly 11% of global CO2 emissions, but faces pressure to improve energy intensity while maintaining output.

In response to mounting decarbonization pressure, the metals industry is becoming more electrified. Electric arc furnace production accounts for 29% of global crude steel output, according to World Steel Association, and the share is far higher in markets such as Italy and the United States.

Yet power quality, a less visible but still significant player in steel and aluminium processing, is emerging as a determinant of success for these investments. Steel and aluminium production will remain high-energy, high-consequence operating environments where a process interruption is rarely just an electrical event. It can cause production loss, safety exposure, and commercial challenges. 

This creates practical tension. Electrification is central to many lower-carbon metals pathways, but it is not simply a matter of replacing one energy source with another. In metals, it means connecting highly dynamic, high-power consuming processes to electrical networks that may already be constrained, variable, or subject to tighter grid requirements.

When electrical instability becomes a production problem

For a metals plant, power quality is a core element of process stability – with reliability, availability, and compliance becoming just as important as efficiency. 

Poor power quality can appear as nuisance trips, voltage dips, unexplained stoppages, unstable furnace operation, higher wear on equipment, flicker complaints, harmonic distortion, transformer stress or variability in downstream quality. Operators may first see the symptoms in the process, not in the electrical room. That is what makes it critical. 

Systems need to supply electricity but also actively stabilize it, especially in dynamic industrial environments, to enable reliable and high performing outputs. This is especially critical in metals processing where high-powered machinery like electric arc furnaces and rolling mills place extreme stress on electrical networks.

Poor power standard is not an abstract compliance issue. A rolling mill can experience speed instability, for example, but often remain unnoticed in normal operations because they are managed in the background. However, with dynamic loads, constrained grids and rising electrification, disturbances like voltage dips or harmonics can cause instability, control issues and downtime, making power increasingly important as process tolerances become stricter. 

The problem is becoming more acute because metals plants are being asked to do two things at once. They must become more precise internally, through automation, digital control and tighter process windows, while maintaining operational stability as external energy conditions become less predictable. As electrification scales, the interface between the grid and the process becomes a control point in its own right.

The operational impact of poor power quality  

The strongest energy strategies start before equipment selection. They begin with the operating profile of the plant: load dynamics, grid strength, expected disturbances, required ride-through capability, harmonic limits, flicker constraints, maintenance philosophy and the metallurgical process being served. 

A brownfield electric arc furnace conversion, a new mini mill, an aluminium potline and an electrowinning operation will not have the same electrical risk profile. Treating them as standard electrical packages is where problems begin.

The industry sometimes talks about electrification as a primarily a process decision – but is not. It is a system decision, meaning power and process must be engineered together. 

A power quality solution that looks strong on paper but is difficult to maintain, hard to restore or poorly integrated with the process control philosophy will not solve the operational problem. In energy-intensive metals environments, availability often matters more than marginal efficiency gains – and the best system is not always the most efficient one. 

The commercial risk is straightforward. If the plant cannot stay connected, stable and compliant, investments in upgrades will not deliver the business case promised. Digital tools can improve visibility, but they cannot compensate for an unstable electrical foundation. Automation can tighten control, but it relies on dependable energy. Electrified production can reduce emissions exposure but only if it protects availability.

That is why power quality should be treated as part of process stability, not as an electrical afterthought.

Building stability into electrified operations

Treating power quality as part of process stability means integrating it into plant design, operations and transformation planning from the outset, not addressing it only after disturbances occur. In practice, this requires metals producers to evaluate how dynamic loads, automation systems, power conversion equipment and grid conditions interact under real operating conditions. 

For many producers, this includes improving ride-through capability for critical processes, strengthening integration between power and automation systems, monitoring harmonics, voltage stability and network disturbances in real time, and designing systems around maintainability and recovery time rather than efficiency alone. 

As these environments become more complex, many metals producers are working more closely with technology partners that can integrate power quality, automation and process expertise into a single operational strategy. Technology partners that understand both the electrical and process dimensions of metals production can help producers design systems that are resilient and capable of supporting long-term electrification and digitalization strategies.

Power quality as a production strategy

For decision makers, the practical questions are changing. It is no longer enough to ask how much energy a plant needs, but how that energy performs under real operating conditions.

As electrification scales, power quality becomes inseparable from production performance. The challenge is not only managing dynamic loads and grid compliance, but ensuring power conversion, automation and protection systems are fully integrated, maintainable and engineered to support reliable operations over decades.

Poor power quality is no longer an electrical detail sitting behind modern metals production. It is one of the key factors that determines whether electrification and automation can deliver stable and reliable output in real operating conditions.