The networking project between Fujian and Guangdong started in April, 2002 1 year, with a total investment of 3.2 billion yuan.1DC back-to-back converter station was built in Fujian, which was connected to Fujian power grid and Guangdong power grid through two 500 kV AC lines respectively, with a transmission capacity of 2 million kilowatts and a total length of 303 kilometers. Is this project imitating the Three Gorges Project? Guangdong? After the 500 kV HVDC project, the second interconnection channel between the State Grid and China Southern Power Grid.
Xin Baoan, Chairman and Party Secretary of State Grid Co., Ltd., said that the Fujian-Guangdong interconnection project is a major power grid project jointly funded by the State Grid and China Southern Power Grid, which is a precedent for the two networks to jointly build and operate the power grid, and has important demonstration significance for realizing the optimal allocation of power resources in a wider range and promoting the high-quality development of China power grid. The project has significantly improved the power supply guarantee capacity of the two provinces, and will better help Fujian and Guangdong to realize green and low-carbon energy transformation? Double carbon? Target. Meng Zhenping, Chairman and Party Secretary of China Southern Power Grid Co., Ltd. said that the Fujian-Guangdong networking project is of great significance for thoroughly implementing the coordinated development strategy of the Party and the state, serving the construction of Guangdong-Hong Kong-Macao Greater Bay Area and the cooperative development of Guangdong-Hong Kong-Macao Greater Bay Area and the economic zone on the west side of the Taiwan Strait. China Southern Power Grid will cooperate with the State Grid to do a good job in the operation and maintenance management of the project, ensure that the role and value of the Fujian-Guangdong networking channel are fully exerted, and effectively ensure the safe and reliable supply of electricity.
Huang Xuenong, director of the Supervision Department of the National Energy Administration, pointed out that power grid projects, especially inter-provincial transmission projects, play an important role in optimizing resource allocation, strengthening power grid structure, improving power supply support capacity and enhancing power grid toughness. The National Energy Administration will continue to provide policy support in power grid construction and clean energy development, and accelerate the follow-up? Fourteen or five? For major power grid projects, strive for early approval, early start-up and early production. ? Interconnection ensures safe and reliable power supply. Guangdong and Fujian provinces are experiencing rapid economic development and strong demand for electricity. Expect? Fourteen or five? By the end of the year, the maximum load of Guangdong and Fujian power grids will reach 65.438+0.8 billion kilowatts and 0.58 billion kilowatts respectively. The industrial structure of the two provinces is different, and the characteristics of daily electricity consumption and monthly electricity consumption are different. The daily rush hour and the monthly rush hour are different. Fourteen or five? During the period, through the Fujian-Guangdong interconnection project, the power transmission and mutual assistance capacity of the two places will reach 2 million kilowatts, which has the ability to adjust and complement each other in different time dimensions such as day, month and season. At the same time, the two provinces are located in typhoon-prone areas along the southeast coast. Due to the differences in geographical location and surrounding environment, it is unlikely that the two provinces will be affected by natural disasters at the same time. After Fujian-Guangdong interconnection, once faced with typhoon, rainstorm, flood and other natural disasters, one party can provide emergency support to the other, reduce the risk of power grid operation, and improve the power supply guarantee and emergency response capability under extreme conditions.
? Multi-energy complementarity promotes the transformation of green and low-carbon energy. Fujian is an important clean energy base in the southeast coastal areas of China, and its electricity has a certain export capacity on the basis of self-balance. Guangdong is a typical receiving power grid. It is estimated that in 2025, the transmission of electricity from west to east will account for nearly 30% of the maximum load, and there is a large space for receiving external power. The completion and commissioning of the Fujian-Guangdong interconnection project is conducive to giving full play to Fujian's advantages in energy resources and reserves, further improving Guangdong-Hong Kong-Macao Greater Bay Area's energy security capacity, and is of great significance to ensuring the safe and reliable supply of electricity in Fujian and Guangdong and serving the economic and social development of the two provinces. ? In terms of technological innovation, a number of Fujian-Guangdong interconnection projects implemented for the first time fully absorbed the latest achievements of frontier technologies such as UHVDC transmission in China, which can well meet the technical requirements of interconnection between the two networks. By using technologies such as reactive power compensation devices, remote sensing images, all-digital photogrammetry systems, and three-dimensional information management platform of power grid, the line path was optimized and the project progress was promoted.
The project has achieved a number of firsts in technical innovation: for the first time, a new type of 6-inch thyristor was developed and applied to build a large-capacity converter valve, which reduced the DC voltage by 20%, the converter loss by 15% and the floor area of the valve hall by15% under the same converter capacity; The new hybrid active filtering technology is developed and applied for the first time, and the harmonic filtering ability of the system is improved by more than 8 times. The application of advanced equipment such as high-reliability converter transformer, dry smoothing reactor and large current capacity bushing has improved the insulation level of key equipment by more than 30% and the current capacity by more than 20%. The new technology of converter transformer rapid protection is applied for the first time, the protection speed is increased by 50%, the safety of equipment and system is improved in an all-round way, and the intrinsic safety of the project is realized. The project further promoted the technological innovation and development of power grid, effectively promoted the development of upstream and downstream industrial chains, and promoted a new round of technological upgrading and breakthrough in China power industry. (Author: Wang Zhitong)