US transformers are ageing. Renewable energy could make things worse, China study finds

South China Morning PostEN 1 min read 100% complete by Victoria BelaFebruary 9, 2026 at 07:00 AM

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A Chinese study has found that increased integration of renewable energy sources like wind and solar power can accelerate the aging of power transformers, vital components in electricity grids. Researchers in Chongqing discovered that high levels of renewable energy increased bidirectional power flow switching, causing stress not accounted for in current standards. Testing revealed that this two-way flow could cause transformers to age 23% faster than previously estimated. The study highlights potential challenges for aging grids, such as those in the US and Europe, already facing transformer shortages and rising energy demands. The findings suggest that the integration of renewable energy could place additional strain on these grids due to the increased wear and tear on power transformers.

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Key Player Opposition Context

Chongqing 40% Europe 60% China 70% Donald Trump 80% United States 90%

Keywords

power transformers 100% renewable energy 90% ageing grids 80% bidirectional power flow 70% wind and solar integration 60% energy demand 50% electricity grids 50% artificial intelligence 40%

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Negative

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South China Morning Post

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power transformers renewable energy ageing grids bidirectional power flow wind and solar integration energy demand electricity grids artificial intelligence

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