'Build a highway for electric transportation - KEPCO 765kV transmission network construction project' Our country has achieved the first 765kV ultra-high-speed, ultra-high-voltage transmission network in the East with our own technology. The ultra-high-voltage transmission network project, which transports electricity produced at power plants to all parts of the country, is a major power project equivalent to the construction of the KTX for railways and the Autobahn for roads. It increases power transmission capacity by more than five times compared to the existing 345kV transmission network, and can reduce environmental destruction by efficiently utilizing narrow land areas. Let's go into the myth of the national aorta replacement project that took 15 years, from overcoming the sorrow of a technologically backward country to exporting transformers and transmission/substation designs. 1. Build a cross-country, ultra-high-speed, ultra-high-voltage transmission network! In the past, there were many areas where power outages were frequent and electricity was not available. However, now, the dependence on electricity is so high that all activities are halted without it. As the demand for electricity increases day by day, facilities that can quickly supply large amounts of electricity have become urgent. This was made possible by the transmission network. Accordingly, in June 1992, the Korea Electric Power Corporation launched the 765kV Upgrade Promotion Team and began developing equipment suited to our country's circumstances, as well as designing and manufacturing transmission towers. 2. Build 666 transmission towers! Transmission towers are installed on mountains, avoiding residential areas and roads, so they are bound to be difficult construction projects. A total of 666 transmission towers had to be built across the sections connecting Dangjin to Shinseosan and Sinanseong, and the sections connecting Uljin to Shintaebaek and Singapyeong. The length of the wires to be connected to the transmission towers was a whopping 340km. The construction was also done using eco-friendly methods that did not destroy forests, and materials were transported using ropeways and helicopters without digging access roads. The technicians and workers had to walk up the mountains themselves. 3. Make gas-insulated switchgear (GIS) and transformers with our own technology! Now, at KEPCO headquarters, they were discussing how to reduce the size of the substation and build it in an environmentally friendly manner. As a result, the GIS system, which uses insulating gas to eliminate the exposure of live parts where electricity flows, was adopted. Hyosung Heavy Industries was in charge of manufacturing the GIS, and Hyundai Heavy Industries was in charge of manufacturing the transformer, which is the core facility of the substation. The transformer is capable of supplying electricity to about 100,000 households, and transporting it is as difficult as manufacturing it. Since there was no precedent for transporting 165 tons of equipment domestically, land, sea, and air operations began. It was an important project for a country that could produce the two main axes of the substation, the GIS and transformer, on its own. 4. Spread Korea’s electric power technology around the world! In April 2002, commercial operation of the 765kV transmission and substation facility was finally achieved. Electricity generated at the power plant was transmitted via the 765kV transmission grid. This not only solved the power transmission shortage in the metropolitan area, but also established the best power grid in Asia. As the 765kV transmission network upgrade project was successful, requests from foreign countries for technology transfer began to pour in. 15 years of continuous efforts toward new methods and new technologies have finally illuminated the world! #transmission network #transmission tower #KEPCO