1. Transmission loss is further reduced
At present, there are many factors that will lead to the loss of power energy in the process of transmission, and the loss will reduce the economy of UHV power transmission projects to a large extent. Transmission losses mainly include substation losses and transmission line losses. Among them, the transmission line losses are large, mainly manifested as power loss and resistance loss. Although the application of UHV power transmission and transformation technology can greatly reduce the loss of power energy in the transmission process, from the perspective of the completed UHV power transmission projects, the loss problem in the power transmission process is still an important factor affecting the economics of related projects. In response to this problem, my country is actively developing a new type of expanded wire with a larger expansion ratio to further reduce the loss in the process of power energy transmission. The application of this wire can not only reduce the construction cost of power engineering, but also improve the UHV transmission. The overall efficiency of the project also plays an important role.
2. Higher voltage level of HVDC transmission system
In recent years, my country has continued to make breakthroughs in the research of UHV power transmission technology. At present, on the basis of inheriting the original research results, the research in the field of UHV power transmission and transformation in my country is making breakthroughs in the application of higher voltage levels, focusing on ± 100 kV HVDC transmission, and has made certain achievements in the design of the main circuit scheme and the parameter design of the main equipment.
3. Connect UHV DC to UHV AC
The UHVDC transmission system has a strong transmission capacity, and it has a great impact on the AC network when it is connected to the AC network. In order to ensure power consumption and the normal operation of the equipment, it is necessary to establish a corresponding auxiliary transmission system, and optimize the technical scheme for connecting to the 1 000 kV UHV AC system, involving 1 000 kV line access, combined transformer connection, hierarchical access, etc.
Article Source: 崔斌 照明电气 2022年第8期