Transmission system adapting to global energy Internet and control method thereof

Abstract

The present invention relates to a transmission system adapting to a global energy Internet and a control method thereof. The system comprises a receiving end system and a sending end system; the receiving end system comprises a first receiving end and a second receiving end, the first receiving end comprises a LCC (Line Commutated Converter) station, the second receiving end comprises at least one VSC (Voltage Source Converter) station, the LCC station of the first receiving end and the VSC station of the second receiving end are connected through a direct current cable; the VSC station of the second receiving end is configured for electric energy conversion and feeding of the electric energy into alternating current power grids at different districts; the VSC station of the second receiving end and the LCC station of the first receiving end are both provided with control devices; the sending end system comprises at least one LCC station; and the LCC station of the feeding end system is connected with the LCC station of the first receiving end of the receiving end system through an overhead line. According to the technical scheme, the transmission system adapting to the global energy internet and the control method thereof employ the direct current cable and the VSC so as to solve the problem that high-capacity electric power is transmitted to European and American developed areas with difficult corridors and easily perform access of the local power grids.

Description

technical field [0001] The invention belongs to the technical field of direct current transmission, and in particular relates to a power transmission system adapted to the global energy internet and a control method thereof. Background technique [0002] The energy development of human society is facing serious challenges such as resource shortage, environmental pollution, and climate change. Accelerating the development and utilization of renewable energy, implementing clean substitution and electric energy substitution, and building a global energy internet are the only ways to promote the energy revolution and achieve clean development. [0003] Considering the resource and load location differences and non-dispatchability of renewable energy, it is necessary to build a large power grid. The first is the national power grid, as the United States, Japan, and European countries did in the 1950s and 1980s, as well as what China, India, Brazil, etc. are currently doing. The...

AI Technical Summary

Problems solved by technology

First, it must be DC based on stability and controllability requirements; second, it must be UHV in view of transmission distance, transmission capacity and transmission efficiency requirements; finally, due to environmental and corridor restrictions, UHV DC based on LCC technology and overhead lines It is impossible for power transmission to go deep into every corner of the world, and the existing power transmission system lacks effective topology and control methods

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