Abstract
In view of the imbalanced distribution of power load and resources, including the status of “electric shortage” in some cities in our country, the article discusses the long-distance transmission technology. It mainly analyzed two ways of the long-distance transmission: UHV AC transmission and UHV DC transmission. The fractional frequency transmission technology and half wavelength AC transmission technology of AC transmission are introduced. Some key technologies of long-distance transmission are described. It has a guess for long-distance transmission future direction.
Highlights
According to the requirements of the development of China's national economy, the national power generation capacity of 1100-1200 GW plan is expected to be realized in 2020
China's current situation analysis, energy and electricity load in the geographical distribution of exeme imbalance, according to the latest data, about 68% of the hydropower resources in China located in the southwest region, about 76% of the coal resources disibution in the north or the northwest of China, and about 70% of the electricity load is mainly concentrated in the eastern coastal areas [1,2,3,4,5]
More and more serious with the consumption of resources, a lot of our region have been facing the risk of resource depletion, coal resources is an important resource for thermal power, coal shortage has caused some of our cities face a “shortage” dilemma, serious impact has an affect of the residents’ production and livg
Summary
According to the requirements of the development of China's national economy, the national power generation capacity of 1100-1200 GW plan is expected to be realized in 2020. The development of nuclear power, wind power, hydropower and other new energy can significantly reduce the proportion of thermal power. By the end of 2008, the installed capacity of wind power in China has more than 10 million kilowatts capacity. If this part of wind power transfer out through long-distance transmission, can solve the problem of "shortage", and make a great contribution for scheme s of grid interconnection and “North to South". Making large-capacity, and the imminent application of long-distance power transmission technology, highapacity, high reliability combined power system is bound to become the future development direction. High pressure, long-distance power transmission technology has become an integral part of grid technology
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