In 2020, Hitachi invested $6.4 billion to acquire an 80.1% stake in ABB Group's power grid business, a move that has proven highly strategic. There is a surging transformer market, because transformers serve as the backbone of electrical systems and are now in high demand. According to China’s General Administration of Customs, the country exported 4.216 billion RMB worth of transformers in August 2024, a 5.9% increase from the previous month and a 37.7% rise from the same period last year. The cumulative export value from January to August 2024 reached 28.671 billion RMB, reflecting a 28.4% year-over-year increase. This dramatic market expansion is primarily driven by the global shift toward renewable energy, which has opened new opportunities for transformers. Unlike traditional oil-immersed transformers, dry-type transformers offer enhanced safety, environmental sustainability, fire resistance, and moisture resistance, earning them widespread acclaim in the renewable energy sector.

(Source: Global Energy Monitor)

The environmental benefits of dry-type transformers make them especially suitable for the renewable energy industry, classifying them as “green transformers.” A green transformer is designed to meet energy-saving, low-carbon, and recyclable standards throughout its lifecycle. Key attributes of green transformers include low overall energy consumption (energy-efficient and low-carbon), high resource efficiency, minimal environmental impact, and recyclability. Additionally, they produce fewer harmful emissions and reduce waste during disposal or recycling. These qualities make dry-type transformers ideal for supporting low-carbon circular economies, as they align with the sustainability requirements of modern infrastructure. So, what unique advantages do dry-type transformers bring to the renewable energy industry?

Dry-type transformers are widely used in various renewable energy applications due to their adaptability and durability. In the wind energy sector, for example, dry-type transformers are valued for their high reliability, efficiency, and low noise levels, which meet the strict requirements of wind power installations. Their insulation materials are resistant to moisture, which prevents potential failures due to humidity—a significant concern for wind farms located in damp or coastal areas. In the solar power industry, dry-type transformers play a critical role in converting the DC power generated by photovoltaic systems into AC power, enhancing overall energy production efficiency. Additionally, because dry-type transformers do not emit harmful substances, they are a preferred choice for electric vehicle (EV) charging stations, where both safety and environmental protection are essential. This versatility positions dry-type transformers as a vital component across various renewable energy sectors.

There are multiple types of dry-type transformers, such as epoxy resin transformers, amorphous alloy transformers, and rectifier transformers, each serving specific needs. At CEEG, research and development efforts focus on improving transformer performance by calculating and measuring stray magnetic fields, studying dynamic and thermal stability, and reducing stray losses to increase the overall durability of the transformer. Every dry-type transformer undergoes extensive theoretical analysis and simulation testing to ensure insulation reliability. CEEG has also partnered with top Chinese universities to develop a coil temperature field calculation program, allowing real-time monitoring of internal temperature and loss in transformers. This advanced temperature monitoring enhances the intelligence of power generation systems, enabling more efficient and reliable energy production.

There are multiple types of dry-type transformers, such as epoxy resin transformers, amorphous alloy transformers, and rectifier transformers, each serving specific needs. At CEEG, research and development efforts focus on improving transformer performance by calculating and measuring stray magnetic fields, studying dynamic and thermal stability, and reducing stray losses to increase the overall durability of the transformer. Every dry-type transformer undergoes extensive theoretical analysis and simulation testing to ensure insulation reliability. CEEG has also partnered with top Chinese universities to develop a coil temperature field calculation program, allowing real-time monitoring of internal temperature and loss in transformers. This advanced temperature monitoring enhances the intelligence of power generation systems, enabling more efficient and reliable energy production.