, China
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State Grid Zhenjiang completes 500 kV support grid for Jurong pumped storage power project

The project has 21 kilometres of transmission lines and 53 iron towers.

State Grid Zhenjiang Power Supply Company announced completion of the supporting 500 kilovolt grid project for the State Grid Jiangsu Jurong Pumped Storage Power Station, which is considered to be the world's highest dam-based pumped storage power station.

Located in the province of Jiangsu, the pumped storage power station utilises the elevation difference between the upper and lower reservoirs to either generate potential energy for storage or convert this to electrical energy to be fed into the grid, Zhenjiang said.

The company said the new grid project involves 21 kilometres of transmission lines and 53 iron towers. The first unit of the pumped storage power station will be connected to the State Grid through this line in August.

More than half of the transmission lines for the supporting grid project were erected on mountains in the cities of Nanjing and Zhenjiang. 

The State Grid Jiangsu Jurong Pumped Storage Power Station has a total installed capacity of 1.35 million kilowatts and a total investment of around CNY9.6b ($1.32b) since its construction began in March 2017.

"The pumped storage power station is connected to the 500kV Shangdang Substation. Once all six units are operational by the end of 2025, it will annually pump 1.8 billion kWh of water and generate 1.35 billion kWh of electricity, meeting the annual electricity needs of approximately 360,000 households and reducing carbon dioxide and sulfur dioxide emissions by approximately 357,000 tons annually," said Bao Lei, director of the 500kV substation operation and inspection center of State Grid Zhenjiang Power Supply Company.

CNY1=$ 0.14

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