Flexible direct-current power transmission converter valve tower based on voltage source converters

Abstract

The invention discloses a flexible direct-current power transmission converter valve tower based on voltage source converters. A vertical structure is adopted, and the whole flexible direct-current power transmission converter valve tower is supported on the ground. The valve tower comprises at least one valve layer, the valve layers are arrayed in the vertical direction and provided with independent water distribution pipelines, each valve layer comprises at least one valve section, the valve sections in each valve layer are arranged in a linear mode, each valve section comprises a plurality of flexible direct-current power transmission converters for completing voltage conversion, and all the converts in the valve tower are connected in series. The converter valve tower is compact in structure, good in electrical performance and mechanical performance, and good in running stability.

Description

[0001] Technical field [0002] The present invention involves the field of power electronics technology, especially a flexible DC transmission streaming valve tower based on voltage source variables. Background technique [0003] With the growth of the economy and the continuous improvement of people's living standards, my country's demand for electricity is getting higher and higher, and my country's energy and power reserves are unevenly distributed. Therefore, how to efficiently solve the problem of electricity resources is a major Hot spots and difficulty.At present, the most commonly used is AC transmission technology, but due to the resistance loss of the wires and the loss of the AC anti -resistance, when the line is too long, all the electrical energy transmitted will be consumed on the transmission line. Therefore, Vigorous research and development of DC transmission technology have become necessary. [0004] DC transmission technology is commonly used in the stream tub...

AI Technical Summary

Problems solved by technology

The suspended valve tower adopts a flexible connection method as a whole, which is mainly connected by the suspension insulator and the rotary hinge. The degree of freedom in the horizontal direction, so the overall operating stability and shock resistance of the valve tower are reduced

When the vertical structure converter valve tower is applied in high-power high-voltage DC transmission, the overall components of the valve tower need to be greatly increased, but the structure is limited, and there are many design difficulties. At the same time, the structure requirements for the converter valve valve hall are greatly improved. Installation is also more inconvenient

At the same time, this type of valve tower needs to take overall shielding measures for different valve layers, which will affect the heat dissipation effect of the valve tower to a certain extent. In the design, it is difficult to satisfy electrical performance and mechanical performance at the same time, and the structure is too compact. Installation and maintenance work has brought a lot of inconvenience

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