JSHP Transformer

JSHP Transformer, founded in 1967, is a family-owned company and one of the world’s largest manufacturers of transformers, with a production capacity reaching 200,000 MVA and voltage ratings up to 850kV. The company is recognized as the largest producer of medium power transformers globally, delivering over 111,500 MVA in 2022 and maintaining a strong reputation in the global transformer market.

In the HVDC sector, JSHP manufactures power transformers, shunt reactors, and phase-shifting transformers for high voltages such as 500/750kV and 220/345kV, and has supplied more than a hundred high-voltage units—including multiple auto-transformers—to major utility companies in the USA and Canada since 2009.

TransnetBW

TransnetBW operates the electricity transmission system in Baden-Württemberg, ensuring security of supply and playing a crucial role in the integration of renewable energy sources. The company is responsible for maintaining, planning, and expanding over 3,300 kilometers of extra high voltage power lines, which transmit voltages of 220 and 380kV across an area of approximately 34,600 square kilometers. TransnetBW does not appear to have specific activities focused solely on HVDC technology, as its primary role involves managing high-voltage AC transmission systems. However, its involvement in ensuring grid stability and integrating renewable energy sources could potentially involve HVDC systems in future projects or collaborations.

Grid United

Grid United is an independent transmission company focused on developing next-generation energy infrastructure to create a more resilient and efficient electric system across the United States. The company is actively engaged in large-scale projects and collaborations to connect regional energy markets, increase grid reliability, and support the integration of renewable energy sources.

Grid United is a key developer of high-voltage direct current (HVDC) transmission lines, most notably leading the North Plains Connector project, which aims to be the nation’s first HVDC link connecting three regional electric markets. Additionally, the company is developing several other HVDC lines in western states to enhance grid interconnections and facilitate the movement of clean energy between regions.

Iberdrola

Iberdrola is a global leader in renewable energy and smart grids, operating in countries with strong credit ratings and serving nearly 100 million people across dozens of nations while employing over 40,000 staff and managing assets exceeding €150 billion.

Iberdrola is actively shaping the future of transmission infrastructure with ongoing investments in clean energy integration and large-scale transmission projects, though its direct involvement in HVDC projects is typically as developer, operator, or owner, leveraging its vast expertise in connecting international renewable generation to major grids.

Electric Power Research Institute (EPRI)

EPRI is an independent, nonprofit organization founded in 1972 that conducts research and development related to the generation, delivery, and use of electricity, aiming to address key challenges such as reliability, efficiency, affordability, health, safety, and environmental issues in the energy sector. With a global reach, EPRI collaborates with over 450 companies in 45 countries, supporting innovation across the entire electricity value chain from sustainable energy strategies to system reliability and low-carbon resources.

In the field of high-voltage direct current (HVDC), EPRI advances research and demonstration projects to improve HVDC technology, focusing on enhancing electric system reliability, flexibility, and integration of low-carbon resources through collaborative efforts with utilities and industry partners.

Electroenergien Sistemen Operator

Electroenergien Sistemen Operator (ESO) is the independent transmission system operator of Bulgaria, responsible for managing and operating the country's high-voltage electricity transmission grid, which spans more than 15,000 km of power lines and 297 substations. ESO oversees operational regime planning, control of the power system, and collaborates with neighboring countries' networks to ensure the efficient and reliable functioning of Bulgaria's electricity system.

Regarding HVDC activities, there is no specific mention of HVDC operations or projects in the available information about ESO, indicating that their primary focus is on AC high-voltage transmission within the national grid.

Orient Cable (NBO)

Orient Cable (NBO) is a leading Chinese cable manufacturer specializing in land and subsea cable system solutions, including research and development, design, manufacturing, installation, and maintenance services. Established in 1998 and headquartered in Ningbo, China, the company holds a prominent position in the global subsea cable market, with a broad product portfolio that covers HVAC land and subsea cables, HVDC land and subsea cables, as well as umbilical and dynamic cables. It serves diverse sectors such as utilities, telecommunications, oil and gas, construction, and renewables, and holds multiple international certifications including ISO9001 and DNV accreditation.

In the HVDC domain, Orient Cable provides advanced land and subsea high-voltage direct current cables up to ±535 kV, having pioneered China’s first 220 kV and first HVDC XLPE submarine cables. The company commands over 98% market share in China’s high-voltage submarine cable sector and offers comprehensive capabilities in HVDC cable R&D, manufacturing, and offshore installation and maintenance, making it a key player in enabling high-capacity and long-distance power transmission projects.