Diversified new energy sources ensure grid stability

On April 28, 2025, Spain and Portugal suffered a rare large-scale power outage, resulting in power outages for tens of millions of users. This incident exposed the vulnerability of traditional power grids in the face of sudden large-scale power supply imbalances, and also highlighted the necessity of developing a diversified, distributed renewable energy power generation system. As a leading cable export company, the photovoltaic cables under Shenxing Cable Group have obtained the authoritative certification of TÜV Rheinland, providing safe and reliable "neural network" support for renewable energy power generation.

Overview of the massive power outage in Spain

At 10:33 a.m. on April 28, 2025, the Iberian Peninsula power grid lost about 15 gigawatts of power in just five seconds, triggering the disconnection of the Spanish and French power grids, causing the power system in Spain to instantly become unbalanced and collapse.

The power outage affected subways, high-speed railways, airports and communication networks. Hospitals were forced to use emergency generators, traffic lights were paralyzed, causing severe congestion, and tens of thousands of passengers were stranded at stations.

As of that evening, more than 87% of the power supply had been restored, but there was still demand in some areas to be dispatched, and full power restoration might take a week.

The importance of power supply diversity and renewable energy generation

Global energy organizations continue to warn that relying on a single or centralized energy structure will face multiple risks such as geopolitical conflicts, extreme climate events and cybersecurity. The International Energy Agency (IEA) pointed out that energy diversification is a core strategy to enhance national security, and it is necessary to accelerate the deployment of low-carbon energy to avoid future crises.

At the International Energy Security Summit held in London, participating countries agreed that renewable energy, nuclear energy and energy storage technology should jointly form a "resilient power grid" to cope with the instability of traditional fossil fuel supply chains.

At the same time, the United Nations emphasized that solar and wind power generation is not only almost zero-emission, but also cheaper than coal and natural gas in most regions, which helps to mitigate climate change and improve air quality.

The International Renewable Energy Agency (IRENA) further pointed out that clean energy combined with energy efficiency improvement can significantly reduce dependence on imported fossil fuels, promote cross-border energy cooperation, and reduce the impact of price fluctuations on the economy.

Academic research shows that the complementarity between different types of renewable energy (such as photovoltaic-energy storage, wind power-hydropower) can significantly improve system reliability and achieve a smooth transition of energy supply.

The key role of photovoltaic power generation and photovoltaic cables

As the installed capacity of photovoltaic power generation continues to rise, the supporting photovoltaic cables undertake the "last mile" power transmission task from components to inverters. Their electrical safety, weather resistance and UV resistance are directly related to the stable operation of the system.

Research shows that compliant photovoltaic cables must meet EN 50618 (DC cables) and related IEC standards, have excellent heat resistance, UV resistance and oil resistance, and ensure long-term safe operation in high temperature, exposure and humid environments.

In an emergency, distributed photovoltaic microgrids can provide timely power to a small area through local power generation, alleviating the risk of global power outages caused by large-scale power grid failures.

Highlights of Shenxing Cable Group's photovoltaic cables and TÜV Rheinland certification

Shenxing Cable Group's photovoltaic cables have passed the complete testing of TÜV Rheinland's global testing laboratory, including short-circuit withstand, high and low temperature cycle, fire resistance and aging tests, and obtained 2PfG 1169/08.2007 type PV1-F certification, which complies with the EN 50618 standard, proving its excellent reliability in photovoltaic array interconnection and grid access.

The certification system covers the entire process from material formulation to finished product inspection, ensuring that photovoltaic cableswith TÜV certificates can work stably under any extreme climate conditions and ensure system safety.

With leading production technology and strict quality control, Shenxing photovoltaic cables have been exported to multiple new energy markets such as Europe and North America, providing customers with high-quality products endorsed by third-party TÜV Rheinland.

Conclusion

The Spanish blackout once again reminds us that it is urgent to build a modern power grid system with "new energy as the main body and diversified complementarity". Shenxing Cable Group, with its TÜV Rheinland-certifiedphotovoltaic cables, provides solid guarantees for distributed photovoltaic power generation and microgrid construction, helping the global power system to achieve higher reliability and sustainability. In the future, we should continue to strengthen the collaborative innovation of photovoltaic, wind energy, energy storage and other technologies to jointly build a solid energy security barrier.
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