With a total investment of 24.2 billion, the world's first UHV multi-terminal flexible DC converter station was completed

With the rapid development of new energy, China has become the largest country in hydropower, wind power, and solar power generation, and the proportion of renewable energy continues to increase. In order to integrate these volatile and intermittent clean electric energy into the grid, it is imperative to upgrade the power transmission technology. This requires more advanced power transmission equipment.

Guangxi Liubei Converter Station is the world's first UHV multi-terminal flexible DC converter station, and it is also a multi-terminal hybrid DC project with the highest voltage level and the largest transmission capacity in the world.

The new generation of flexible DC converter valve has a faster power adjustment speed, which can realize the rapid compensation of the fluctuating clean energy charge and power. In the future, the turbulent current will be turned into a soft finger, and the clean energy will be integrated into the grid. may. At the same time, it can shorten the troubleshooting time of the grid to less than 100 milliseconds.

One of the cores of the flexible DC converter valve is the flexible straight module. The price of a flexible straight module is equivalent to a high-end car. It can process tens of thousands of points of data in a ten-thousandth of a second to achieve precise control of the transmission power. The control and protection accuracy of the power grid is improved to the microsecond level.

TBEA undertakes the equipment development and production task of Wudong Deliu North Pole 1 converter station. The total equipment capacity is 3GW, involving 2 valve halls and 24 valve towers.

Another core component is the control board, which is the brain of the flexible DC converter valve. It seems that there are tens of thousands of electronic devices on the ordinary board. Each electronic device has an independent transmission line, which can achieve more than 1 billion Hz. Very high frequency transmission. Such massive and fast data processing capability is equivalent to the entire valve control system has uploaded 8,000 data in the blink of an eye of a human being in 0.2 seconds.

This technology is currently the commanding height of energy application technology that global power giants are seizing. There are only three countries that can be manufactured in the world.

The new flexible DC converter valve is ready to be put into operation. It will be used in a new flexible DC transmission line, the "Kunliulong" DC project, which can send the 33 billion kilowatt-hours of electricity generated by the Wudongde Hydropower Station, the world's seventh largest hydropower station, across 1,452 kilometers to Guangxi, Guangdong.

Flexible DC transmission technology can achieve faster and more flexible grid regulation. It is considered to be a key technology to deal with the large-scale grid integration of renewable energy in the future.