대한전선

Taihan Secures Korea’s First Extra-Long Continuous Underground Power Grid Project​Taihan has won a groundbreaking project commissioned by Korea South-East Power Co. to build Korea’s first underground power grid using extra-long continuous cable technology. The project involves connecting the Goseong Natural Gas Power Plant and the Shingoseong Substation in Goseong County, Gyeongsangnamdo Province, with a 345kV extra high-voltage underground power grid. Taihan will oversee the entire process, from manufacturing and transporting extra high-voltage cables and cable accessory to cable installation and electrical construction.This project marks a significant milestone as it introduces extra-long continuous cable technology in Korea for the first time. This advanced technology enables the production and installation of cables longer than 1 km in a single stretch, more than doubling the 500-meter average production length previously used in the country. Korea South-East Power adopted this method to catch up with advanced overseas technologies and implement cutting-edge infrastructure domestically.By using this technology, the need for intermediate cable joints is eliminated, allowing a single cable to cover the entire grid section. This approach reduces manufacturing and construction costs, shortens construction timelines, and enhances efficiency. Furthermore, it minimizes the risk of faults, thereby improving the reliability of power supply.Taihan attributes its success in securing this project to its proven track record in similar undertakings, such as a large-scale extra-long continuous cable grid project in Singapore. In that project, Taihan successfully constructed a 400kV underground power grid, Singapore's highest voltage level, using cables with lengths of approximately 1.9 km. The project, conducted over three years from 2016, demonstrated Taihan’s advanced expertise in extra-long continuous cable technology and bolstered its reputation both domestically and internationally.

​Photo caption)Taihan conducts a certification test at KEPRI Gochang Power Test Center with the participation of KEMA Laps“First in Korea to be Certified in 90℃ Allowable Conductor Temperature”Taihan Completes the Development of 525kV VSC HVDC and Obtains International Certification- Ideal for long-distance transmission and renewables, driving demand in the U.S., Europe and beyond- Diversified HVDC portfolio to find business opportunities in various projects- Plans to focus on ensuring technology and business competitiveness in response to market expansionTaihan Cable & Solution has successfully developed the world's most advanced HVDC cable.Taihan (CEO Song Jong-min) announced on August 2 that it has completed the development of a 525kV VSC (Voltage Source Converter) HVDC (High Voltage Direct Current) land cable system and obtained internationally recognized certification. This was achieved in approximately eight months following the company's successful development of the first 500kV LCC (Line Commutated Converter) system in Korea last December.525kV is the highest voltage of HVDC cable commercialized to date, and only a few global companies have the technology due to the difficulty of development. In this development, Taihan designed the conductor cross-sectional area of the cable to be 3,000㎟ and raised the allowable conductor temperature of the conductor to more than 90℃ to achieve internationally recognized certification.The larger the cross-sectional area of the conductor and the higher the allowable conductor temperature, the more current it can carry, which is advantageous for large-scale power transmission, but Taihan is the only company in Korea to be certified with an allowable conductor temperature of over 90℃ for a 3,000㎟ conductor. It is not easy to find successful development cases overseas, so Taihan is credited with taking HVDC cable technology to the next level.HVDC is a method of converting alternating current (AC) power generated by power plants into direct current (DC) and transmitting it, and is considered a key technology for long-distance, high-capacity power transmission. According to the conversion method, it is divided into Voltage Source Converter (VSC) and Line Commutated Converter (LCC), and VSC is becoming a global trend because it can be transmitted in both directions and converter stations are easy to install. As the application of HVDC in renewable energy generation, such as wind and solar power, is actively expanding, the demand is expected to increase.In fact, transmission system operators (TSOs) in Europe are adopting voltage-type HVDC for many of their recent grid-connected renewable energy projects and cross-border supergrid projects.An official from Taihan said, "Following the certification of 500kV LCC HVDC cables for the first time in Korea, we have secured unrivaled technological competitiveness in 525kV VSC HVDC cables." "As investment in power infrastructure expands worldwide, especially in developed markets such as the United States and Europe, we will be able to secure business opportunities in various HVDC projects.""Once the submarine cable plant under construction in Dangjin, Chungcheongnam-do, is completed, we will accelerate the development and certification of submarine HVDC cable systems. As the HVDC market continues to expand in the medium to long term, we are committed to ensuring our technological and business competitiveness.According to industry estimates, the global market for HVDC cables will expand from KRW 70 trillion in 2020 to KRW 159 trillion in 2030.Meanwhile, in anticipation of the expanding demand for HVDC, Taihan has selected HVDC cables as a key driver and has made efforts to develop them. After successfully developing 500kV MI-PPLP (Mass Impregnated cables insulated with polypropylene laminated paper) HVDC cables in 2017, it successfully developed 500kV XLPE voltage and current HVDC in 2022.  

Picture description) Taihan is conducting internationally accredited certification in the KEPCO Electric Power Research Institute's Gochang Power Test Center.  “500 kV LCC XLPE HVDC Cable”! Taihan, made a splendid achievement of obtaining Internationally Accredited Certification of Korea's First   - Successfully completing KEMA international certification for immediate commercialization, and certification for 500 kV VSC- Securing opportunities to participate in large-scale domestic projects at the same time as well as acquiring technology and stability certification - As the HVDC cable market in Europe, U.S., etc. is rapidly growing and HVDC cable is suitable for transmission over long distances and application in new and renewable energy, the demand for HVDC cable is expected to rapidly increase Taihan will begin making full-fledged efforts to extend its influence into the market of HVDC cable rapidly growing on a worldwide basis.Taihan (CEO Na Hyeong-gyun) announced on Dec. 5th that it has completed the development of a 500kV LCC (Line Commutated Converter) XLPE HVDC (High Voltage Direct Current) land cable system and obtained internationally accredited certification.  500 kV is the highest voltage among LCC XLPE HVDC cable systems developed so far, and Taihan made a splendid achievement of completing KEMA international certification as it is the first in Korea and the second in the world after Japan to complete KEMA internationally accredited certification for 500 kV LCC XLPE HVDC cable. KEMA international certification is an internationally accredited certification with which export and commercialization without separate testing are possible. HVDC has less power loss than AC (Alternating Current) and has no restriction in the transmission distance, so it is touted to be a key technology for long-distance large-scale power transmission. The demand for HVDC is growing rapidly internationally as the demand for inter-country power grid connection (Super grid) and new & renewable energy sources based on DC such as solar power, wind power, and fuel cells increase. It is estimated according to industry experts that the global market size of HVDC cables will expand from KRW 70 trillion in 2020 to KRW 159 trillion in 2030. In particular, HVDC, which is insulated with XLPE has excellent insulation and heat resistance performance and high durability, so the demand for HVDC is rapidly growing in the advanced markets such as Europe and the United States, etc. Taihan successfully completed the certification about the 500kV LCC XLPE HVDC land cable system in the presence of KEMA Laps in the KEPCO Electric Power Research Institute's Gochang Power Test Center. In particular, this certification has high significance in that the test was conducted by applying technical specifications higher than international standards so that it can be immediately used in large-scale HVDC projects scheduled to be conducted in Korea. By obtaining this certification, Taihan is officially recognized for its technology and stability, while at the same time securing an opportunity to participate in large-scale projects. Furthermore, Taihan also succeeded in the KEMA international certification test for VSC (Voltage Source Converter) 500 kV HVDC cable in addition to LCC XLPE 500 kV HVDC cable. As a result, Taihan is equipped with technical capabilities for 500 kV HVDC land cable systems of all conversion methods, such as XLPE LCC and VSC, including the 500 kV MI-PPLP (Mass Impregnated Polypropylene Laminated Paper) HVDC developed in 2017, which allows Taihan to be able to actively respond to the market. President of Taihan, Na Hyeong-gyun, said, “It is very encouraging that Taihan has been recognized for its HVDC technology through international certification at a time when the global demand for long-distance transmission and the spread of new and renewable energy sources are becoming active. We will actively seek business opportunities in projects that are in full swing in Europe and the United States, etc., as well as participating in large-scale HVDC projects scheduled to be carried out in Korea." In addition, he added, “We will secure all technological capabilities related to HVDC and enhance competitive edge by completing the development of a HVDC submarine cable system as soon as possible by utilizing the submarine cable seaside plant scheduled to be built in Dangjin, Chungcheongnam-do.” Taihan judged that the demand for HVDC would continue to expand, selected HVDC cables as a key driving force for the company's sustainable growth, and established a dedicated organization in 2016. In 2017, it succeeded in developing a 500 kV MI-PPLP HVDC cable, jointly developed a new insulator material for HVDC cable accessories with Hwaseung Material Co., Ltd., a company specialized in manufacturing materials, and realized localization of HVDC core materials and technological independence.​ 

Taihan first passing the PQ test of 500kV in Korea- the highest voltage among underground power cables- A chance to expand into new markets such as Russia.TEC passed the 500kV extra-high voltage PQ (Pre Qualification) test of the internationally authorized Holland’s test organization, KEMA, for the first time in Korea on April 26.​500kV extra-high voltage cables are the highest voltage among underground cables, and are the product which requires high technology that only a small number of global electric wire companies can manufacture and install.​After TEC commercialized its existing 300kV, 380kV, and 400kV grade extra-high voltage cables, it started developing high value-added extra-high voltage 500kV cables from 2008. As a result, the type test was passed in 2010, and the PQ test progressed for 1 year since 2011. Especially, in order to inspect performance in extreme environments such as Russia, after installing the cables and joints in environments similar to actual conditions, tests have been carried out by accelerated degradation for 1 year. Certification by the world’s most credible KEMA in the electricity area means that the technology of TEC  was globally approved in regards to the manufacturing and installation of a 500kV cable system. ​TEC officials said, “We plan to actively start expanding into advanced markets including Russia, by continuing to develop high value-added extra-high voltage technology for the improvement of profitability and expansion of overseas market.”

Developed the Composite Bushing for the first time in KoreaTaihan developed composite bushing, one of the key parts for handling terminals for the extra high voltage power network, for the first time in Korea. The composite bushing is used for the end box of the 220kV to 300kV extra high voltage cable. As the composite bushing uses silicon materials, it is highly resistant against external impacts compared to the existing porcelain bushing type and has good transmission characteristics so that it is being used very widely. Moreover, the light weight, convenient installation, and extremely low maintenance cost has made it very popular recently.​ Taihan succeeded in localizing the composite bushing to achieve a better price and shorter delivery period so that our competitiveness in winning domestic and overseas new projects has been enhanced. ​In particular, product performance was verified through the electricity presence test of the Power Division of San Diego, USA and so was used as the major accessory material of the San Diego 230kV extra high voltage power network project that was won last February. Taihan will expand the product range to the class between 345kV and 500kV.

Taihan succeeds in the first ‘AC HV Test’ in Korea​On Mar. 11th, Taihan succeeded in the ‘AC HV Test’ for the first time as Korean company in Ulsan-city. The test was completed in a 2.2 Km field of construction work to replace 154 KV transmission lines. ​The AC HV test meets the international standards suggested by IEC (International Electrical Commission). The test gets rid of inconvenience of employing previous ‘DC HV Test’ or ’24 hour no-load test.’ In addition, it reduces the whole test time to only an hour. ​KEPCO said that it would be applied to every transmission construction test from this September. ​Due to the success of the test, Taihan can have more chances to demonstrate the stability and superiority of the underground extra-high voltage transmission cable and construction.