我国规模最大光氢储一体化项目储能电站并网投运，年发电量约4.68亿千瓦时The country's largest integrated solar-hydrogen storage project energy storage power station has been connected to the grid and put into operation, with an annual power generation of about 468 million kilowatt-hours.

According to Xinhua News Agency, the 400 MW integrated solar-hydrogen-storage project in Guohua Rudong, along with its supporting energy storage power station, officially connected to the grid and began operation on October 14. With this, the photovoltaic and energy storage parts of the project have been fully put into operation, while the hydrogen energy part is undergoing accelerated commissioning. The energy storage station has a capacity of 60 MW/120 MWh, making it the largest supporting energy storage facility of an integrated solar-hydrogen-storage project in China.

The project is located in the coastal tidal flat area of Yangkou Port, Rudong, Jiangsu, with a total photovoltaic installed capacity of 400 MW, covering about 4,388 mu. It is a key project of the third batch of the national 'Sago Desert' large-scale wind and photovoltaic base. The project includes the construction of a new 220 kV onshore booster station and a hydrogen production and refueling station with a hydrogen production capacity of 1,500 standard cubic meters per hour (refueling capacity of 500 kg/day), forming a complete industrial chain of 'power generation—energy storage—hydrogen production—hydrogen refueling.'

The photovoltaic power station achieved full-capacity grid-connected generation on April 29, 2025, with an average annual grid-supplied electricity of about 468 million kWh, sufficient to meet the annual electricity needs of nearly 200,000 households.

The commissioned energy storage power station is equipped with one 60 MW/120 MWh energy storage unit, configured with 27 energy storage battery cabins of 5 MWh each, 13 prefabricated cabins of 5 MW converter and booster integrated units, and one prefabricated cabin of 2.5 MW converter and booster integrated unit. After connecting to the 35 kV bus, it is connected to the photovoltaic booster station via a 220 kV cable circuit and integrated into the grid.

As a grid-side energy storage project, the energy storage power station's charging and discharging is under the unified dispatch of the Jiangsu power grid, while forming a staggered complementary relationship with hydrogen production loads. When photovoltaic output peaks and the grid's absorption capacity is insufficient, surplus electricity is prioritized to charge the energy storage batteries, and hydrogen production equipment simultaneously increases capacity, converting excess electricity into hydrogen that can be stored long-term. During peak grid electricity demand, the energy storage power station discharges rapidly to support the grid peak, while hydrogen production load is adjusted accordingly to feed electricity back to the grid, forming a flexible interactive model of 'producing hydrogen during valleys and supplying electricity during peaks.'

Compared with traditional photovoltaic-storage projects, the integration of photovoltaic-hydrogen-storage treats hydrogen production as a flexible consumption outlet, creating a multi-timescale regulation system that complements rapid adjustment with long-term storage. This helps improve the on-site absorption level of renewable energy electricity.

After this energy storage unit is put into operation, Rudong County's 'source-grid-load-storage-hydrogen' integrated energy system will be further improved. As of now, Rudong County's total installed capacity of renewable energy has exceeded 8.3 million kilowatts, with wind power, photovoltaics, and other renewable energy sources becoming the mainstay of the regional energy supply.

[Source: Xinhua News Agency]

[Editor: Xiao Neng]