On April 30, the 500-kV Ehuang Switch Station and associated line upgrading project (the "Ehuang Series Project") in Guangdong province was officially put into operation. As China's largest offshore wind power bundled transmission project, it integrates power from six major offshore wind farms and two conventional thermal power plants in western Guangdong. The project brings an initial grid-connected capacity of 6.95 million kW, which is expected to grow to 10.92 million kW by 2026 — equating to nearly half the installed capacity of the Three Gorges Hydropower Station. Once fully operational, it is projected to transmit over 30 billion kWh of electricity annually to the Guangdong-Hong Kong-Macao Greater Bay Area.
By the end of March, the installed capacity of new energy within CSG's service area had already surpassed 210 million kW, making it the region's dominant power source. The maximum penetration rate of new energy reached 56%, with new energy accounting for 21% of total power generation. Such massive new energy operation has created a "double high" system — characterized by a high share of new energy and a high proportion of power electronic equipment — presenting new challenges for grid safety and stability.
Working alongside domestic equipment manufacturers, CSG has successfully tackled the challenge of ensuring safe and stable bundled transmission of new energy and conventional power sources. The system now enables large-scale, controllable regulation of new energy when grid demand arises, refining management of its output. This sets a valuable precedent for future bundled transmission projects and strengthens the safe, stable operation of the evolving power system.
"Bundled wind and thermal power" refers to combining the transmission of intermittent wind power with steady thermal power to enhance supply stability and improve the efficiency of renewable energy utilization.
