https://www.sitime.com/ SMART ENERGY GRID 25 www.power-mag.com Issue 2 2025 Power Electronics Europe Smart Energy Grid: Precision Timing for Energy Infrastructure Resilience by Rich Kapusta, VP, Segment Marketing, SiTime The winter storm Uri hit the heart of Texas in February 2021, knocking out power for roughly 4.5 million residents. 210 citizens died as a result of the storm and the financial losses are estimated at $80 to $130 billion. There were many causes for the disruption in power, ranging from generation unit outages to troubles in transmission and distribution, including a maximum load shed and the lowest grid frequency ever experienced in the state. Uri is just one example that underscores the importance of a resilient energy infrastructure. As extreme weather conditions become more common, continuity of service during system stress is never more important. Today’s power grids are complex with a wide mix of energy sources, including gas, coal, nuclear, wind and solar. This is overlayed by a dizzying array of technologies involved in power production, storage and transmission and distribution. These technologies and the data signals moving through them must be precisely synchronized. One weak link in the infrastructure can disrupt power access for households and businesses. To better ensure reliable power access, the power grid is becoming smarter. Cutting edge sensors, processing power, advanced communications and more are enabling more efficient and resilient power grids. This article focuses on how timing devices are critical components of a smart energy grid to keep the power flowing. Why the Existing Power Grid Is Fragile The power grid is fragile due to aging infrastructure, centralized design and an inability to meet modern energy demands. Built decades ago, many components are deteriorating and prone to failure. A centralized structure creates single points of failure, where issues at major nodes can trigger widespread outages. External threats like extreme weather and cyberattacks targeting outdated systems increase the fragility. Additionally, the grid struggles to integrate renewable energy sources like solar and wind, highlighting its inability to adapt to modern energy needs. Demand figures into a power grid’s resilience. Operators must maintain grid frequency within a narrow tolerance (e.g., ±0.050 Hz from 60 Hz in North America or 50 Hz in Europe). The Electrical Reliability Council of Texas (ERCOT), the organization who manages the Texas grid, warns that prolonged frequency deviation can rupture AC connections and damage equipment. In fact, high demand exceeding supply causes frequency drops, forcing power plant shutdowns or blackouts, while low demand with high supply raises frequency, requiring supply cuts. These vulnerabilities leave the grid illequipped for a more electrified future.
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