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The Final 90 Seconds: How the Iberian Grid Collapsed
The Iberian blackout unfolded in less than 90 seconds. ENTSO-E’s investigation documents a cascade of generation disconnections, rising transmission voltages, falling frequency and the eventual separation of Spain and Portugal from Continental Europe. This engineering reconstruction examines the sequence that brought down the grid.
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The Grid Before the Blackout: Generation, Topology and Voltage Control
Before the Iberian blackout of April 28, 2025, Spain’s transmission system was exporting electricity to neighboring networks while operators managed oscillations and changing voltage conditions. This engineering investigation examines the network configuration, generation resources, reactive-power capabilities and operating decisions that shaped the system’s vulnerability.
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Spain’s 2025 Blackout: How a Voltage Crisis Brought Down the Iberian Grid
On April 28, 2025, the electricity systems of mainland Spain and Portugal collapsed in a rapid cascade. Drawing on the ENTSO-E investigation, this engineering analysis examines the voltage-control failures, oscillations, generation disconnections and operational challenges behind one of Europe’s most consequential blackouts.
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U.S. Selects 63 Tribal Energy Projects for More Than $125 Million in Support
DOE has selected 63 tribe-led projects for award negotiations involving more than $125 million. The programme includes electricity access and infrastructure planning; funding remains conditional on negotiations.
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Brazil Secures €150 Million for Distribution Grid Automation and Modernization
EIB and Neoenergia have signed €150 million in financing for distribution modernization. Planned work includes lines, substations, protection, control and automation during 2027–2030.
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Europe’s Transmission Operators Set New Priorities for Grid Security, Flexibility and Modernization
ENTSO-E’s new strategy sets five priorities spanning system security, connections, adequacy, future operations and market integration. The objectives are strategic direction rather than adopted technical standards.
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New U.S. Wind-Equipment Policy Raises Questions About Grid Cybersecurity and Supply-Chain Security
A U.S. proclamation directs negotiations over wind-equipment imports and cites cybersecurity concerns. Its policy assertions do not establish a newly confirmed cyberattack or product compromise.
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Protection-Relay Settings Contributed to Koeberg Nuclear Unit Shutdown, Operator Reports
Koeberg Unit 1 has returned to service after an October 16 electrical disturbance. Eskom identifies a conservative relay setting as a contributor and says protection operated as designed.
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Texas Adds New Grid Stability Constraint Following Generation Expansion in Nueces County
ERCOT has announced a new bidirectional transmission constraint for the Nueces County 138-kV area, effective November 4. The operator links the change to new generation resources.
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The Future Grid: A New Operating System for Electricity
The future electric grid will be shaped by more than generators and transmission lines. Power electronics, advanced controls, digital networks and AI-assisted operations are creating a new operating model for electricity. The final installment of the Power Electronics Supercycle explores what comes next.