China's largest offshore solar farm starts construction in Jiangsu Province

China's largest offshore solar farm officially commenced construction at Haibin harbor in Lianyungang city, East China's Jiangsu Province on Sunday, China National Nuclear Corporation (CNNC) said, setting another milestone in the country's intensifying green transformation in aligning with its carbon neutrality goal by 2060.

With a total investment of 9.88 billion yuan ($1.39 billion), the 2-million-kilowatt photovoltaic demonstration farm is expected to save around 680,000 tons of standard coal and reduce carbon dioxide emissions by 1.77 million tons annually once completed, according to the CNNC.

Experts said that more offshore solar farms will be launched in bolstering clean and renewable ne- energy generation, which is needed by regional economic development in the country's major coastline provinces.

This project built by CNNC, one of the country's largest nuclear power operators, is so far the largest three-dimensional layered sea-based project in China, with an approved sea area of around 28,000 mu (1,868 hectares). 

The project is located in the warm water sea area already earmarked by the Tianwan Nuclear Power Plant in Lianyungang. While an area of the water is utilized for the nuclear power plant's warm water discharge, the sea area above it is designated for offshore photovoltaic construction. This design represents a cohesive and integrated use of marine resources.

The 2-million-kilowatt tidal flat photovoltaic project is divided into two parts, both offshore and onshore. The offshore section comprises the photovoltaic power generation, with the generated electricity transmitted to the onshore step-up substation via an overhead corridor bridge and integrated into the national grid after voltage adjustment. Simultaneously, onshore energy storage stations are being constructed as complementary facilities. 

Currently, the onshore energy storage project has entered its final construction phase and is expected to be completed and operational by the end of June.

The project serves as an important demonstration for offshore solar power generation, Lin Boqiang, director of the China Center for Energy Economics Research at Xiamen University, told the Global Times on Sunday.

The project's key advantage lies in its proximity to the market where electricity demand is significant, Lin said.

"Given that the southeastern coastal areas are among China's fastest-developing regions with high electricity demand, the potential for offshore solar farms remains substantial," Lin noted.

China has a high demand for solar power, but the persistent reliance on coal is primarily due to the insufficient contribution by new energy sources, including solar, the expert said, noting that solar and wind power combined now accounts for 15 percent of the entire power generation structure.

In 2023, China's newly installed photovoltaic capacity reached 216.88 gigawatts, a year-on-year increase of 148.1 percent, according to the China Photovoltaic Industry Association, indicating further growth in demand for clean and renewable new energy.