Core Insights - The Hainan 500 kV main grid project has been fully put into operation, marking a significant upgrade in the province's power infrastructure, increasing the voltage level from 220 kV to 500 kV for the first time, enhancing power transmission capacity by over 4 times [1][2] - The project includes the construction of three new 500 kV substations and a total of 838 kilometers of transmission lines, which will improve the reliability and safety of power supply across Hainan [1][2] - Hainan's electricity demand is projected to grow rapidly, with the highest power load expected to reach 1,550 MW by 2030, driven by the development of the Hainan Free Trade Port and large-scale clean energy projects [2][3] Investment and Infrastructure Development - The total investment for the Hainan 500 kV main grid project is 5.7 billion yuan, which includes the establishment of five new 500 kV main transformers with a total capacity of 3.75 million kVA [2] - The Southern Power Grid plans to invest 46 billion yuan during the 14th Five-Year Plan period to enhance Hainan's power infrastructure and support capacity, significantly improving interconnection with Guangdong [3] - Future plans include the construction of a third 500 kV AC line connecting Hainan and Guangdong, which will increase the cross-sea transmission capacity by 50% to 1.8 million kW [3]