Jinping - Sunan ¡À800kV UHV DC Project Officially Put into Operation

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¡¡¡¡Aerial view of Yulon converter station, Jinping-Sunan Project. [Photo by Gao Zhixing]

¡¡¡¡On December 12, with China¡¯s independent research and development, design and construction, Jinping-Sunan ¡À800kV UHV DC Transmission Project fully completed its system commissioning and trial operation, and was officially put into commercial operation. The project is SGCC¡¯s third UHV transmission project following the success of the UHV AC and DC demonstration projects, representing the current highest level of DC transmission technology in the world.

¡¡¡¡The ceremony was held at SGCC¡¯s headquarters. Wang Yeping, Vice Chairman of the State Electricity Regulatory Commission, Li Yunfeng, Jiangsu Provincial Party Standing Committee Member and Executive Vice Governor, and Fan Bo, Deputy Secretary-General of Sichuan Provincial Government attended the ceremony. EVP Zheng Baosen announced the official start of its operation. EVP Luan Jun presided over the ceremony.

¡¡¡¡Jinping-Sunan Project, via 8 provinces and cities of Sichuan, Yunnan, Chongqing, Hunan, Hubei, Zhejiang, Anhui, and Jiangsu, takes the responsibility of delivering hydropower of Guandi Hydropower Station in the Yalong River and Jinping I and II Hydropower Stations, as well as Sichuan surplus hydropower in wet period. The total length is 2059 kilometers and the total investment is 22 billion yuan.

¡¡¡¡The project, with the world's largest transmission capacity, longest transmission distance and highest voltage level, has raised the UHV DC transmission capacity from 6.4GW to 7.2GW and broke through 2,000 km transmission distance for the first time, creating a new record of UHV DC transmission. After its full operation, it will annually transport 36TWh of power to the East China, having significant economic and environmental benefits in solving the power shortage in dry period and surplus in wet period in Sichuan, a structural contradiction of the area, satisfying the eastern region¡¯s electricity demand for sustained socio-economic development and alleviating increasingly serious ecological environmental issues. On the basis of the UHV DC Demonstration Project, it is the first UHV DC project with 100% domestic set design, promoting the innovative development of the national equipment manufacturing.

¡¡¡¡Zheng Baosen said at the ceremony that Jinping-Sunan Project¡¯s successful construction was another major breakthrough in China¡¯s DC transmission technology and equipment, further consolidating China¡¯s innovation and leading position in the field of world UHV transmission. It would become another important green energy channel delivering power from the western region to the eastern area. Its successful construction would further consolidate SGCC¡¯s confidence and determination in developing the UHV. SGCC would vigorously transform the grid development mode and accelerate the construction of a Strong and Smart Grid to ensure power grids¡¯ safe and stable operation and reliable electricity supply, making new and greater contributions to the socio-economic development.

¡¡¡¡Jinping-Sunan Project¡¯s sending converter station is located in highly polluted area with a high altitude and high seismic intensity, setting tougher requirements in construction, technology innovation, equipment and heavy-cargo transportation. Under joint efforts of all involving units, the builders worked hard and carried forward the spirit of ¡°in search of excellence, in pursuit of out-performance¡±, conquering all difficulties in system research and engineering design, key equipment development, heavy-cargo transportation, equipment installation, on-site construction and system debugging problems. Thus, SGCC has delivered quality project construction and system commissioning with high standard. Equipment contract was signed in March, 2011. Soon after, bipolar low-end power transmission was realized in June, 2012 and bipolar full-voltage power transmission was realized in November. It was a new record in UHV DC construction.

¡¡¡¡Since the bipolar low-end power transmission on June 27, Jinping-Sunan Project has transmitted 4TWh of power, a powerful guarantee of successfully delivering the hydropower from Guandi, Jinping hydropower units and Sichuan surplus hydropower in flood season, effectively easing the power shortage in Jiangsu and East China during the peak summer time this year.

¡¡¡¡Ceremony sub-venues were set at the East China Branch, Central China Branch, Jiangsu Electric Power Company, Sichuan Electric Power Company, as well as Jinping and Suzhou converter stations. (Report: Zhang Ting; photo: Du Ping, Gao Zhixing)

¡¡¡¡Source: State Grid News

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