On September 8, 2026, a 400 kV main transformer weighing several hundred tons was officially taken offline at the TBEA factory. This customized equipment is about to depart for Abu Dhabi and be embedded in the world's first large-scale solar storage project with stable power supply 24/7. When there is no light in the photovoltaic system at night and energy storage is alternated between charging and discharging, this double split main transformer will become the power hub of the entire station, providing core substation support for the benchmark project of energy transformation in the Middle East.

Double split technology for fault isolation

The SFFZ300000/400 main transformer that was taken offline this time has a rated capacity of 300 megavolt amperes. It adopts a three-phase oil immersed air cooling and low-voltage double split technology route. The low-voltage side has two independent 150 megavolt amperes branches, which can be connected to two sets of 35 kV new energy collection systems at the same time. The core advantage of the dual split structure lies in fault isolation: when one circuit fails, the equipment can quickly isolate and limit short-circuit impact, while the other circuit still maintains normal operation, avoiding single point failures that could cause the entire station to shut down. The ultra wide range on load voltage regulation capability can adapt to severe fluctuation scenarios such as photovoltaic output surge and energy storage discharge, which is suitable for the complex and changing operating conditions of large-scale solar energy storage power stations in deserts.

Fill the gap in 400 kV wide voltage regulation technology

This offline event fills the technical gap of TBEA in the field of 400 kV wide voltage regulation and large capacity split transformers. The high temperature desert environment in the Middle East, large capacity new energy gathering, and strict access standards for the power grid require special requirements for transformer insulation, heat dissipation, voltage regulation, and short-circuit resistance. The equipment is customized and developed for the working conditions of the Masdar all-weather solar energy storage project, indicating that the domestic power transmission and transformation supporting capabilities are further adapted to the special needs of ultra large scale solar energy storage power stations. In recent years, TBEA has been continuously cultivating the high-end power market in the Middle East, and has participated in multiple national level energy infrastructure projects in the United Arab Emirates and Saudi Arabia, delivering high-grade transformers and reactors in bulk. Keywords: New Energy News Network, Solar Storage, Clean Energy

Power transmission and transformation equipment opens up the incremental market for overseas expansion

The stable operation of large-scale solar energy storage power stations not only requires photovoltaic and energy storage systems, but also the high-voltage main transformer, as an energy collection and voltage conversion hub, directly determines the reliability of power supply for the station. In the past, energy storage overseas focused more on battery cells and inverters, but G-watt level photovoltaic storage projects also have a very high threshold for high-voltage transmission and transformation equipment. TBEA has completed the full chain supporting output from energy storage battery system to high-voltage main equipment, and China's power transmission and transformation equipment is synchronously participating in the global competition for top photovoltaic storage projects. With the continuous release of high-end power equipment demand from the Middle East optical storage project, domestic complete technology manufacturing enterprises are expected to continue to gain opportunities for overseas projects, and power transmission and transformation equipment is becoming another growth pole outside of energy storage going global.Editor/Gao Xue