× Comprehensive Solution ATC needed a solution that could control the power flow across the Straits of Mackinac and the UP, and at the same time operate reliably in challenging, remote parts of the system. The solution was a high voltage, direct current (HVDC) converter station using voltage source converter technology, operating in a back-to-back configuration to stabilize the system. Black & Veatch assisted ATC in developing a comprehensive solution, starting from the initial system analysis through conceptual design, engineering, construction and commissioning for the HVDC converter station. As the owner’s engineer, Black & Veatch ensured that the project met the technical requirements needed to restore system flexibility. “ATC needed an expert in HVDC technology, and we looked for a partner we could depend on to help educate, advise and assist with the Mackinac HVDC project. Black & Veatch was our unanimous choice.” Ken Jauquet, Project Manager, American Transmission Company The HVDC converter station is rated to transfer up to 200 megawatts of power bidirectionally and provide reactive power for local voltage support within milliseconds under extremely dynamic conditions. The benefits to ATC’s more than 300,000 customers are system stability, prevention of overloads and the ability to utilize more diverse sources of energy. The project has allowed ATC to schedule outages so that upgrades to existing transmission infrastructure, as well as construction of new lines and substations, can take place as needed. The Mackinac station is the world’s first HVDC back-to-back system for transmission using voltage source converter technology. 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