Specialists warn Brazil that old power grids are on the verge of collapse with excess solar and wind energy, which can cause cascading blackouts, shut down power plants even with surplus energy, and affect entire cities.

Written by Flavia Marinho

Published on 23/04/2026 at 22:48

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Bottlenecks in electrical grids raise frequency above 60.5 Hz, cause automatic shutdowns even with high renewable generation, and increase the risk of cascading blackouts that can affect entire cities

The growth of solar and wind energy is pressing a critical point in the electrical system that few people notice. Old grids do not keep pace with generation and can collapse, creating a real risk of cascading blackouts.

This scenario is concerning because it doesn’t just involve power shortages. The impact can affect industries, hospitals, and essential services, in addition to generating billions in losses and hindering the advancement of large-scale clean energy.

Bottlenecks in transmission lines impede the correct flow of energy

The problem begins in the transmission lines, which carry energy from power plants to cities. Many of these structures are old and not prepared to handle the rapid growth of renewable sources.

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Frequency above 60.5 Hz causes automatic power plant shutdowns

The electrical system needs to maintain a stable standard to function correctly. When the frequency exceeds 60.5 Hz, protection mechanisms activate to prevent greater damage.

At this point, automatic power plant shutdowns occur, even when there is surplus energy. This shows that producing more does not solve the problem if the grid cannot absorb the generated volume.

This type of instability becomes more common with the increasing participation of renewable sources.

Excess renewable energy can become an unexpected problem

Solar and wind generation is growing rapidly and brings important benefits, but it also increases the system’s complexity. During periods of high production, energy overproduction can occur.

Without adequate distribution capacity, this excess pressures the grid and forces control measures. The result can be the shutdown of part of the generation, even with available energy.

This scenario reveals an important challenge for the future of the energy matrix.

Old electrical grids do not keep pace with the new energy reality

Much of the electrical infrastructure was built in a different context, with more predictable generation. Today, the reality has changed and requires more modern and flexible grids.

Without updates, the risk of supply failures and constant instability increases. This creates a direct obstacle to the expansion of renewable energies.

The topic involves investment, planning, and technological adaptation to ensure system security.

Cascading blackouts can affect entire regions in minutes

One of the biggest risks is the so-called cascading blackout, when an initial failure causes a sequence of shutdowns in the system.

This effect can spread rapidly and affect large areas, causing interruptions in essential services and severe economic impacts.

The investigation was published by Jornal da USP, a news portal of a Brazilian public university, which highlighted the potential of these events to compromise entire cities.

Impacts go beyond energy and affect economy and essential services

Electrical instability directly affects the daily lives of the population. Industries can shut down, hospitals can face difficulties, and cities can be without power for long periods.

Furthermore, financial losses may increase, hindering investments and delaying the modernization of the sector.

The challenge is to ensure that the expansion of clean energy happens on a solid and secure foundation.

Transmission towers under a loaded sky reveal the growing pressure on old electrical grids in the face of advancing renewable energy and the risk of system instability

Modernizing electrical grids becomes essential to avoid crises

The solution involves modernizing grids and expanding transmission capacity. Without this, the growth of renewables will continue to pressure the system.

Investing in technology and infrastructure is fundamental to balancing generation and consumption, reducing the risks of failures and blackouts.

The stability of the electrical system depends on keeping pace with the energy transition.

The advance of renewable energies is inevitable, but it requires preparation to prevent a benefit from turning into a problem.

And you, do you believe Brazil is prepared to avoid blackouts with the advance of solar and wind energy, or could this risk soon become a reality?

Specialists warn Brazil that old power grids are on the verge of collapse with excess solar and wind energy, which can cause cascading blackouts, shut down power plants even with surplus energy, and affect entire cities.

Bottlenecks in electrical grids raise frequency above 60.5 Hz, cause automatic shutdowns even with high renewable generation, and increase the risk of cascading blackouts that can affect entire cities

Bottlenecks in transmission lines impede the correct flow of energy

Frequency above 60.5 Hz causes automatic power plant shutdowns

Excess renewable energy can become an unexpected problem

Old electrical grids do not keep pace with the new energy reality

Cascading blackouts can affect entire regions in minutes

Impacts go beyond energy and affect economy and essential services

Modernizing electrical grids becomes essential to avoid crises

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Specialists warn Brazil that old power grids are on the verge of collapse with excess solar and wind energy, which can cause cascading blackouts, shut down power plants even with surplus energy, and affect entire cities.

Bottlenecks in electrical grids raise frequency above 60.5 Hz, cause automatic shutdowns even with high renewable generation, and increase the risk of cascading blackouts that can affect entire cities

Bottlenecks in transmission lines impede the correct flow of energy

Frequency above 60.5 Hz causes automatic power plant shutdowns

Excess renewable energy can become an unexpected problem

Old electrical grids do not keep pace with the new energy reality

Cascading blackouts can affect entire regions in minutes

Impacts go beyond energy and affect economy and essential services

Modernizing electrical grids becomes essential to avoid crises

The Soviet Union spent 22 years drilling into the Earth’s crust and reached a depth of 12,262 meters — they found water where it was thought impossible, hydrogen bubbling from the rock, granite that is 2.7 billion years old, and temperatures of 180 degrees that melted the drill bits.

Egypt wants to draw 10 million cubic meters of water from the Nile per day into the desert, irrigate a new agricultural frontier, and build a city where there is currently only sand.

BRICS is preparing a payment system inspired by the Brazilian PIX that will allow direct transactions between countries using national digital currencies without relying on the dollar or Western banks as intermediaries.

Ethiopia has banned gasoline and diesel cars, placed over a hundred silent electric buses on the streets of Addis Ababa, and now aims for half a million electric vehicles by 2030, all powered by Africa’s largest dam and a courage that few countries have shown.

A view from space, an image made by NASA shows the impressive Richat Structure, a geological formation located in the Sahara Desert, also known as the “Eye of the Sahara.”

A brand that has been manufacturing motorcycles since 1901 launches its first electric model, and the price shocked the world: $3,000, weighing only 124 kg and accelerating from 0 to 60 km/h in 3.7 seconds…

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