The South Korean government is ramping up efforts to localize key equipment and standardize technology for the construction of a high-voltage direct current (HVDC) transmission system from Saemangeum to Seohae Island by 2030. This initiative aims to reduce reliance on foreign technology for conversion transformers and valve and control technologies, while also ensuring compatibility among equipment from various manufacturers.
On September 30, the Climate Energy Environment Ministry held the '2026 Second HVDC Technology and Industry Forum' at the Korea Electric Power Corporation Art Center in Seocho-gu, Seoul. The event was attended by representatives from Korea Electric Power Corporation, the Korea Energy Technology Evaluation Institute, major electrical equipment manufacturers, and academic experts.
HVDC technology is recognized as a critical solution for connecting large-scale renewable energy sources to the power grid, as it minimizes power loss and enhances grid stability compared to traditional alternating current (AC) transmission. However, the high dependency on foreign technology for essential equipment has raised concerns about the need for domestic technological independence.
The government is currently conducting research and development to localize the 500kV voltage-source converter transformers, a key component of HVDC systems. This project, which involves an investment of 28 billion won (approximately $21 million) by the government, includes participation from four companies: HD Hyundai Electric, LS Electric, Hyosung Heavy Industries, and Iljin Electric, which are in the process of designing prototypes.
In the valve and controller sector, Hyosung Heavy Industries was selected as the lead developer following a comprehensive evaluation last month. The government plans to continue its efforts to secure domestic technology for both transformers and valve controllers.
During the forum, participants discussed strategies to optimize the phased processes of the Saemangeum to Seohae Island HVDC project to ensure timely completion. They also reviewed the current status of voltage-source HVDC technology development and strategies to address potential risks.
Additionally, discussions included standardization measures to allow equipment from multiple manufacturers to be utilized within a single HVDC system. The government is also considering ways to link the results of domestic technology localization to practical demonstration projects.
Lee Ho-hyun, the Second Vice Minister of the Climate Energy Environment Ministry, stated, "The HVDC system along the west coast is a crucial infrastructure that must be constructed on time to expand the national power grid. We will ensure the timely establishment of the Saemangeum to Seohae Island HVDC system by 2030 and will not spare policy support to enhance the industrial competitiveness of our companies."
* This article has been translated by AI.
Copyright ⓒ Aju Press All rights reserved.