The modern electrical grid faces a complex balancing act: providing uninterrupted power, recovering swiftly from disruptions, and preparing for a sustainable future—all while keeping costs manageable. These challenges were at the heart of a recent Power Panel hosted by APC Media, featuring Mark Paul, Vice President of Global Sales and Marketing at IRISS and Cassandra Rounds, Senior Engineer at Arizona Public Service (APS).

Over the course of the discussion, the panelists examined the interconnections between reliability, resilience, and sustainability in power systems, illustrated through practical examples, emerging technologies, and strategies for long-term planning.

Defining the Pillars of the Grid

Reliability is the cornerstone of any electrical system, ensuring that power is consistently delivered with acceptable quality. For the average consumer, it’s simple: “lights turn on, appliances work, and devices operate without interruption,” explains Mark Paul, Vice President of Global Sales and Marketing at IRISS. From the utility perspective, reliability represents the confidence customers can place in the system to meet their needs at all times. Resilience addresses the grid’s ability to respond to disruption. It is not merely about preventing outages but about restoring service quickly when they occur. In regions like Arizona, where extreme heat, wildfires, and changing environmental conditions present unique challenges, resilience requires infrastructure capable of withstanding significant external stress while maintaining operational continuity. “Resilience involves both preparing for anticipated hazards and having systems in place to respond effectively to unexpected events,” says Cassandra Rounds, Senior Engineer at Arizona Public Service (APS).

Sustainability focuses on meeting present energy demands without compromising the ability of future generations to meet theirs. This includes deploying renewable and low-carbon energy sources, using materials judiciously, and designing infrastructure with longevity in mind. “Sustainability extends beyond environmental stewardship, requiring a balance between operational efficiency and long-term adaptability of the grid.” adds Rounds. Utilities are increasingly integrating sustainability principles into long-range planning to meet ambitious carbon reduction targets and ensure reliable service over decades.

When Systems Fail

History demonstrates the consequences of failing to integrate these principles. The 2018 California wildfires, worsened by deferred grid maintenance, led to tragic loss of life and widespread property damage. Hurricanes in Houston left millions without power, underscoring the vulnerabilities caused by insufficient routine maintenance and the lack of redundancy in critical systems. The 2021 Texas cold snap highlighted the risks of isolated systems; when the state’s electrical network failed, there were no neighboring utilities to provide emergency support, leaving millions without electricity and generating extraordinary customer costs. Such events underline the importance of planning for extreme scenarios and maintaining interconnections and operational flexibility.

Balancing Reliability, Safety, and Cost

Achieving reliable and resilient power requires trade-offs, particularly when it comes to cost. For example, undergrounding power lines can reduce the risk of outages and wildfire damage, but it is two to three times more expensive than traditional overhead installations. Utilities must balance the financial impact on customers with the long-term benefits of improved system reliability. “Undergrounding is extremely expensive… the conversion is something like two and a half to three times more expensive than overhead,” says Rounds.

Creative approaches are often necessary to achieve this balance. Targeted engineering measures, such as fire-resistant mesh around poles or disabling automatic reclosers during critical periods, can mitigate operational risk without incurring the full cost of undergrounding. Proactive engagement with customers, careful retrofitting of existing infrastructure, and strategic prioritization of high-risk areas enable utilities to enhance reliability and safety without overburdening consumers financially.

“It’s a dance. It’s a balance. When do you spend money to be safe, and how can you just be smarter with what you have now in the system and upgrade things?” explains Rounds.

In parallel, technology providers support this balance by emphasizing human-centered safety. Tools that allow inspection without exposure to live components and early detection systems help utilities minimize risk while preserving the operational integrity of the grid. By integrating these solutions into standard practices, utilities can prevent accidents, protect personnel, and maintain reliable service even under challenging conditions. “It’s not just what that costs me. It really goes now into what the humanizing part of that is. What’s a human life worth? How do we protect humans?” adds Paul.

Future-Proofing the Grid

Planning for the future requires both creativity and adaptability. Energy demand continues to grow, driven by industrial expansion, emerging technologies, and the proliferation of data centers and electric vehicles. Utilities are increasingly exploring diverse generation sources—including nuclear, solar, natural gas, and large-scale battery storage—to meet rising demand while maintaining resilience.

APS, for example, is expanding battery storage capacity and exploring small modular reactors and emerging fusion technologies to accommodate growing loads from dataintensive applications. Such diversification not only strengthens reliability but also supports sustainability objectives by reducing dependency on carbon-intensive generation and providing flexible response options during peak demand or emergency conditions. “We need that flexibility and thinking. We need that passion for creativity, and the bravery for creativity… to think these impossible things to meet our needs,” says Rounds.

Designing systems for long-term performance is critical. Proactive measures, such as incorporating monitoring systems during construction rather than retrofitting later, improve safety and reduce costs over the asset’s life. Early identification of issues, such as partial discharge in electrical equipment, prevents catastrophic failures and allows for timely intervention, ensuring both personnel safety and operational continuity. “Identifying issues like partial discharge, which is the precursor to a complete discharge, arc flash, allows customers to mitigate major events,” notes Paul.

Technological Solutions for Safety and Reliability

Advanced monitoring solutions are now a cornerstone of grid resilience. Infrared inspection windows, ultrasound sensors, and continuous monitoring systems allow utilities to detect and address equipment issues before they escalate into critical failures. By integrating these technologies, utilities can reduce downtime, improve recovery times, and enhance overall reliability. “IRISS provides solutions that allow customers to do inspections more safely without having to open panels up, to do thermography, to do ultrasound readings, partial discharge,” says Paul.

Installing these solutions at the point of construction is both safer and more cost-effective than retrofitting. Monitoring systems can identify issues like early-stage electrical discharge, which often precedes serious incidents such as arc flash events. By combining technological tools with skilled human operators, utilities can maintain robust systems capable of withstanding both routine and extreme stresses.

Engineering for the Human Factor

While technology is essential, human expertise remains central to grid reliability and resilience. Engineers, planners, and field personnel translate design, monitoring, and operational strategies into actionable outcomes. Effective preventive maintenance, accurate interpretation of monitoring data, and wellexecuted emergency response protocols are critical for minimizing outages and mitigating risks. “Human judgment, informed by data and supported by advanced monitoring, is at the heart of a safe, reliable grid,” adds Paul.

Advanced tools extend human capabilities but do not replace judgment. Decisions regarding maintenance priorities, system upgrades, and emergency interventions depend on skilled professionals who can interpret data, understand the operational context, and act decisively. The combination of human expertise and technology is what ultimately enables the grid to perform reliably under normal conditions and recover effectively under duress.

Planning for Extreme Events

Modern power systems must anticipate extreme events ranging from wildfires and hurricanes to heatwaves and grid cyber threats. Planning for these scenarios requires a multilayered approach, including infrastructure hardening, predictive analytics, and operational flexibility. Redundant pathways, interconnections with neighboring utilities, and targeted safety measures ensure that even under severe stress, service continuity can be maintained. “The goal is straightforward: ensuring critical infrastructure stays running 24 hours a day, 365 days a year,” says Rounds.

Utilities are also learning from past failures. Events such as the Texas cold snap have emphasized the need for flexible operational protocols and the importance of integrating resilience into every decision—from equipment design to system operation. A resilient grid is not only built to withstand disruptions but also capable of adapting and recovering swiftly when unexpected events occur.

Strategic Investment in Reliability and Sustainability

Achieving a balance between reliability, safety, and cost demands careful investment. Utilities must evaluate which upgrades deliver the greatest benefit relative to their cost and focus resources on areas with the highest risk. Longterm planning and innovative engineering practices help utilities make strategic investments that enhance reliability and safety while supporting sustainability goals. “If people are buying equipment without some of these things put into place when the equipment is being built… Then later down the line it’s going to cost you more money.” notes Paul.

Sustainability extends beyond environmental responsibility to include the efficient use of materials, reduction of operational waste, and deployment of systems designed to last decades. By integrating these principles into planning and operations, utilities can ensure that today’s energy infrastructure remains reliable and adaptable in the face of growing demand and environmental change.

Conclusion

Reliability, resilience, and sustainability are inseparable pillars of the modern grid. Weakness in one area inevitably undermines the others, making it essential for utilities to plan proactively, invest strategically, and leverage technology while maintaining skilled human oversight. Watch the full Power Panel discussion HERE.