Reliable electricity underpins everything from home life to economic competitiveness: an unplanned outage is felt instantly by households, businesses, and industries alike. But for most of the past century, power grids were largely reactive. Identifying and locating faults often required manual intervention, with crews dispatched to assess the situation and restore power.
This model is now changing. Self-healing grid capabilities enable the network to detect faults, isolate affected sections and automatically restore supply to unaffected areas where the network configuration and operating conditions allow. The engine behind this shift is distribution automation (DA): a layer of smart technologies that empower the grid with real-time awareness and the ability to respond instantly.
The global self-healing grid market is projected to more than double to USD8.56 billion by 2034
The global self-healing grid market is projected to more than double to USD8.56 billion by 2034 – a sign of how central this technology has become to modern power systems. For Tenaga Nasional Berhad (TNB), building a self-healing grid is a cornerstone of preparing Malaysia’s network for a more electrified, renewable, and digital energy future.
What makes a grid “self-healing” and why it matters
Think of a traditional grid like a road network with no traffic cameras: when an accident happens, no one knows exactly where until someone reports it, and traffic stays blocked. DA technology functions like traffic cameras for the power network, adding “eyes and reflexes” through AI algorithms, sensors, and smart devices to enable a self-healing grid.
DA provides the distribution network with real-time visibility and remote control through intelligent electronic devices, sensors, communication systems and automated switching functions. When integrated with suitable fault-management schemes, these capabilities enable faster fault isolation and supply restoration.
When a fault occurs such as a fallen line, equipment failure or storm damage, DA systems can detect and pinpoint its location automatically, often in a matter of milliseconds. They then isolate the damaged section and reroute electricity through healthy lines, so most customers stay powered while the affected area is repaired. then isolate the damaged section and reroute electricity through healthy lines, so most customers stay powered while the affected area is repaired.
For customers, the benefits are tangible: shorter interruptions, faster restoration and, where automated switching can isolate a fault before supply is lost to other sections, fewer customers affected by an outage. Based on prior deployments, self-healing grids can reduce the outage duration by around 40% on average, with improvements of up to 60% in the System Average Interruption Duration Index (SAIDI).
This means shorter disruptions to homes and communities, with frequency of outages also improving by 20-30% based on the System Average Interruption Frequency Index (SAIFI). Together, these improvements support a more dependable power supply that keeps daily activities, businesses, and public services running. In the long run, greater grid automation can also improve operational efficiency and cut costs, with savings ultimately translating into more stable, affordable electricity for consumers.
Indeed, Malaysia’s strong reliability performance reflects TNB’s ongoing commitment to modernise the national grid. By harnessing DA technology at both its control centres and within substations, TNB recorded an improved SAIDI of 46.93 minutes in 2025, reinforcing its position as one of the most dependable electricity providers in ASEAN.
Malaysia keeps pace with a global shift towards smarter grids
Around the world, utilities are increasingly treating self-healing grids as critical infrastructure, not an optional upgrade, with roughly 65% of utilities globally investing in grid automation technologies. In the US alone, nearly 70% of utilities have deployed automated grid technologies, improving power system efficiency by approximately 35%.
The shift is also gaining momentum in Southeast Asia, where the smart grid market is forecast to grow at around 6.1% a year through 2030 , with Singapore emerging as an early regional leader. Reliable, modern power is becoming a central foundation for attracting investment in manufacturing, data centres, and advanced industries.
Here in Malaysia, TNB has been progressively rolling out DA across Peninsular Malaysia as part of its modern smart grid roadmap. Building on this progress, TNB is working towards expanding DA coverage across its substations, supported by the introduction of an Advanced Distribution Management System (ADMS) and a next-generation “Distribution System Operator (DSO) 2.0” model. Complementary innovations, including AI-driven analytics and Digital Twin technology, will further enhance the network’s ability to anticipate disruptions, optimise operations and strengthen resilience.
By integrating DA and smart grid technologies, TNB substations are becoming intelligent hubs of real-time data, detecting fluctuations, overloads, and equipment failures instantaneously. TNB’s expanding deployment of DA has strengthened operational visibility and restoration capabilities. In 2025, TNB reported a 40% reduction in average restoration time for unplanned outages, with most outages restored within 15 minutes.
Keeping a changing energy mix reliable and secure
Despite continued progress, power reliability remains a multi-dimensional challenge tied to geography, resource availability, infrastructure, and consumption patterns. Malaysia’s energy landscape is changing rapidly, with increasingly more large-scale renewables, electric vehicles and energy-hungry data centres connecting to the grid.
Renewable sources like solar are variable – their output rises and falls with the weather, which makes the grid harder to keep in balance. DA systems help manage this variability through real-time monitoring, smoothing fluctuations, and keeping supply stable. In fact, renewable integration now accounts for 40% of grid-automation demand worldwide .
That same intelligence enabled by DA also helps utilities manage peak demand and two-way power flows that older grids were never designed to handle. That said, as grids become more digital and connected, they also become a potential target for cyberattacks – which is why cybersecurity is now inseparable from grid reliability.
Every added sensor, smart meter, and communication link is a benefit but also a new entry point that must be protected. cybersecurity is cited as one of the single largest barriers to smart-grid growth across Southeast Asia . In July 2026, a cyberattack forced a UK power generator to shut down for four days , highlighting the potential impact of cyber threats on energy operations even without disrupting the wider electricity system. Such incidents underscore the importance of strong data protection laws to maintain public confidence and to keep the physical delivery of power secure.
Energy reliability that Malaysians can count on
The most reliable grid is no longer the one that never has a fault, but the one best prepared to detect, contain, and recover from faults on its own. Self-healing grids powered by DA technology are becoming critical infrastructure for powering economic resilience, industrial competitiveness, and everyday quality of life. DA enable TNB identify where a fault occurs, determine which customers are affected, restore supply to unaffected sections and improve customer updates.
Beyond fixing faults, a self-healing grid is the foundation that enables Malaysia to absorb more clean energy safely without sacrificing reliability. As the energy system becomes more complex, the ability to see, respond and adapt in real time will be critical to keeping the lights on while powering Malaysia’s next phase of sustainable growth.
The payoffs for the rakyat are tangible, faster restoration, cleaner energy, and a more secure, cost-efficient system over time. As TNB accelerates its self-healing grid, Malaysia moves closer to a power network that quietly keeps the lights on, ready for whatever the future demands.