What is UHV power transmission?

UHV power transmission refers to the power transmission technology with voltage levels of AC 1000 kV and above, and DC ± 800 kV and above.

How much power is transmitted through UHV?

At present, power transmitted through UHV accounts for 1/4 of the power load in eastern and central China. Additionally, 70 % of the electricity transmitted through the UHV project is generated from clean energy.

What is a UHV converter transformer?

3.1. UHV converter transformer In the UHVDC project, the 12-pulse converter is used as the basic converter unit, and each UHV converter station has 24 converter transformers operating in combination according to the disconnection method, providing two groups of commutation voltages with equal amplitude and 30° difference for the converters .

What does the 14th five-year plan mean for UHV transmission technology?

During the "14th Five-Year Plan" period, UHV has entered a new stage of large-scale, high-intensity and high-quality construction, and the development of UHV transmission technology also needs to meet the overall development needs of the country, which is reflected in the following aspects.

How reliable is a UHV transmission system?

Therefore, the reliability and safety requirements of UHV technology and equipment are very stringent. According to the National Power Reliability Index of 2023 released by China's National Energy Administration, the energy availability rate of the UHVDC transmission system is 96.847 %, showing a continuous improvement in reliability.

How does the UHV project affect the environment?

Additionally, 70 % of the electricity transmitted through the UHV project is generated from clean energy. This is equivalent to a reduction of 830 million tons in coal usage, a decrease of 2 billion tons in carbon dioxide emissions, and a decrease of 6.5 million tons in pollutant emissions in eastern and central China .