(Vientiane/Ho Chi Minh City, September 2024) The ±800kV Lancang-Mekong DC transmission project across Laos, Thailand and Vietnam has officially started commercial operation, marking a new stage in the interconnection of ASEAN regional power grids. The project was designed by China Southern Power Grid and uses bipolar layered access technology to successfully solve the harmonic interference problem caused by frequency differences in multiple power grids (Laos 50Hz/Thailand 60Hz/Vietnam 50Hz).

Technology deepening:

1、Hybrid DC circuit breaker: Equipped with a 160kA fast circuit breaker independently developed by China XD Group, it can cut off fault current within 3 milliseconds, which is 50% faster than the response speed of traditional equipment.

2、Adaptive insulation system: The transmission tower is equipped with intelligent composite insulators, built-in temperature and humidity sensors and self-cleaning coatings, which reduce the flashover risk to 0.1 times/100 kilometers/year in the hot and humid climate of Southeast Asia.

3、Digital twin platform: Integrate Huawei Energy Cloud and Thailand EGAT's SCADA system to achieve real-time simulation of 5,000+ monitoring points, and predict line ice accumulation and lightning strike risks 72 hours in advance.

Industry chain collaboration: The project has driven a 32% increase in regional power equipment exports, including the first localization of the ±800kV converter transformer produced in Thailand. The Asian Development Bank's assessment shows that the project will promote the annual cross-border power transaction volume of the Mekong River Basin countries to exceed US$7 billion in 2025.