In the early autumn of Southern China, with lush trees, the construction of the Guangdong Hong Kong Macao Greater Bay Area is booming. This bay area, which includes 9 cities in Hong Kong, Macau, and the Pearl River Delta, has a population of over 80 million and is one of the regions with the highest degree of openness and the strongest economic vitality in China. The strong demand for energy and electricity is self-evident with such a large population and economic size. According to statistics, since the transmission of electricity from Yunnan and Guizhou to Guangdong in 1993, the cumulative transmission of electricity from the west to the east in the five southern provinces has exceeded 3 trillion kilowatt hours over the past 30 years. The southbound route of power transmission from the west to the east runs from the the Yunnan-Guizhou Plateau through the hinterland of Guangxi to the hinterland and coastal areas of Guangdong, across mountains and the longest route is nearly 2000 kilometers away, delivering a continuous stream of clean power to the power load center of the Guangdong Hong Kong Macao Greater Bay Area, helping the economic and social high-quality development of the Greater Bay Area. The report of the 20th National Congress of the Communist Party of China pointed out that "accelerating the green transformation of development methods. Promoting green and low-carbon economic and social development is a key link to achieve high-quality development." "Accelerating the planning and construction of a new energy system, coordinating hydropower development and ecological protection. As a national strategy to optimize the allocation of power resources and promote coordinated development between the East and the West, the West to East Power Transmission has been given a new mission on the basis of continuing its historical responsibility, becoming the backbone of the low-carbon energy transformation. In recent years, with a series of key projects for the transmission of electricity from the West to the East being put into operation, the transmission capacity of electricity from the West to the East in the southern region has continued to expand, and the proportion of clean energy has continuously increased, effectively promoting energy conservation, emission reduction, and air pollution prevention and control in the Guangdong Hong Kong Macao Greater Bay Area. At the same time, the West to East Power Transmission Project itself is constantly breaking through technological equipment difficulties and technological blockades in Western countries. With generations of grid workers working tirelessly to tackle and innovate, it is driving China's energy and power industry towards a world leading high ground. Breaking through the "unmanned zone" and firmly grasping the core technology in one's own hands, the Wudongde Hydropower Station, the seventh largest hydropower station in the world and the fourth largest in China, has been put into operation for three years. As of June 25th, its cumulative power generation has exceeded 100 billion kilowatt hours, with most of it sent to the Guangdong Hong Kong Macao Greater Bay Area. To ensure the safe delivery of such abundant hydropower, one cannot do without a "major artery" of hydropower output - the Wudongde Power Station's Guangdong Guangxi UHV multi terminal flexible DC demonstration project. The starting point of this key project of transmitting electricity from the west to the east is the Kunbei converter station in Yunnan, and the landing points are respectively Liuzhou converter station in Guangxi and Longmen converter station in Guangdong. Therefore, it also has a pleasant abbreviation - "Kunliulong DC Project". Its production has increased the power transmission capacity of China's West East South Channel by 18%. And what is even more remarkable is that it has created 19 world firsts. "Every world number one can write a big article." Li Li, an academician of the CAE Member, said, "This is a world leading super project. Its production marks that China's ultra-high voltage DC transmission technology has been upgraded to an unprecedented level, creating a new transmission mode, and providing valuable experience for the development of the world's power grids." To meet the requirements of long-distance, high-capacity, high utilization of energy transmission, and to ensure that the power receiving end of Guangxi The Guangdong power grid system is safe and stable. The Kunliulong DC project is the first in the world to adopt an ultra-high voltage multi terminal hybrid DC system, where the transmission end is conventional DC and the two receiving ends are flexible DC. Flexible DC is