Blog Post | 24.08.2026 | 5 min read | Ramon Bächli
Discover how resilient grid communications help utilities modernize networks, protect critical signals, and keep power flowing during extreme weather.
Extreme weather is turning grid resilience into an operational priority. Heatwaves, storms, wildfires, floods, and lightning events are arriving with greater intensity and frequency, pushing assets closer to their limits and making grid conditions harder to predict. The question is no longer whether the grid must adapt, but how fast utilities can strengthen the systems that keep it visible, protected, and in control.
On the hottest day of the year, or during a fast-moving storm, electricity is only part of the equation. The other part is information: whether a remote asset reports its status, whether a protection signal arrives on time, whether field crews can coordinate, and whether control centers have a clear view across the network. If that information is delayed, incomplete, or disrupted, the grid becomes harder to control exactly when operators need certainty most.
The modern power system depends on data, signals, and millisecond exchanges between devices, systems, and people. Protection equipment reacts instantly, substations continuously share operational status, and operators use real-time visibility to maintain grid stability and make informed decisions when conditions change.
Faults can be isolated quickly and reliably when these signals are transmitted in real-time and with the highest availability, allowing operators to intervene before a disturbance spreads. When visibility drops or data arrives too late, the margin for action narrows.
Extreme weather makes this visibility essential. When demand spikes, faults occur, or power flows shift unexpectedly, communication networks help keep electricity available, affordable, and secure by giving operators the information they need to act in real time.
That is why grid communications can no longer sit in the background. They are part of the energy security equation, connecting equipment, control rooms, operators, and automated systems into one coordinated grid that can respond faster when disruption strikes.
For utilities, the challenge is practical: how to modernize critical communication networks without disrupting the services that keep the grid running. Many applications still rely on proven legacy technologies, and those systems continue to play an essential role. But the grid they were built for generated less data, had fewer digital assets, and operated with fewer distributed resources. Today’s grid needs more bandwidth, stronger resilience, tighter cybersecurity, and closer integration between protection, automation, and control systems – while guaranteeing the performance needs of legacy applications.
Modernization therefore needs to be both ambitious and realistic. Utilities need a path that allows legacy and packet-based technologies to coexist, preserving proven services while introducing new capabilities where they are needed most. A staged, hybrid approach reduces operational risk and allows modernization to follow the realities of the grid, rather than forcing a sudden replacement.
Recent field experience makes this shift tangible. In a live-grid test, protection information was exchanged beyond substation boundaries using IEDs from different vendors working together over an operational communication network, showing how utilities can move beyond closed, vendor-specific approaches and toward more interoperable protection concepts.
The value of interoperability is practical: it helps utilities avoid vendor lock-in, scale systems more easily, reduce obsolescence risks, simplify operations, supports substation refurbishment and eases migration with lower effort. Over time, these gains make the grid more future-ready and economically resilient, strengthening competitiveness and helping keep electricity costs under control.
For utilities, modernization is not about replacing technology for its own sake. It is about keeping critical services dependable while creating room for more digital, secure, and resilient operations.
Hitachi Energy’s FOX Multiservice Platform supports this shift by providing a resilient backbone for teleprotection, SCADA, telephony, IEC 61850 traffic, synchrophasor data, and substation communications over a traditional TDM – and modern packet-based networks. By enabling staged migration from legacy SDH, PDH, and TDM networks toward Ethernet/IP, based applications over modern MPLS-TP packet-switched architectures, FOX helps operators strengthen energy security without compromising the services that keep the grid running.
As networks evolve, the speed and dependability of protection signaling become even more critical. Utilities need confidence that mission-critical signals will reach the right place at the right time, even as communication infrastructure moves to more modern architectures.
NSD670, the newest addition to the NSD teleprotection family, supports this transition with secure transmission of teleprotection signals and data over modern Ethernet/IP technologies. It helps utilities move from legacy telecom technologies to packet-based networks while meeting the performance and cybersecurity expectations now shaping critical infrastructure.
As utilities face new cybersecurity requirements, lifecycle expectations, market pressures, and long-term modernization needs, NSD670 provides a future-ready path for protecting mission-critical signals across evolving communication networks.
Together, these technologies address the real operational challenges utilities face: how to maintain proven services while increasing bandwidth, how to protect mission-critical signals across evolving networks, how to improve interoperability between vendors and systems, and how to build a communications backbone ready for more digital, distributed, and dynamic grids.
In a more volatile energy landscape, resilience will depend on more than stronger assets. It will depend on the speed, certainty, and intelligence with which the grid can respond. By strengthening mission-critical communications today, utilities can keep electricity and information flowing together, maintain control under pressure, and build the operational confidence needed for a more secure, flexible, and future-ready grid.
Explore how Hitachi Energy’s communication networks portfolio can help you modernize grid operations with confidence.
