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ABB has won two US$10 million orders to upgrade the control systems for the Square Butte HVDC Scheme and the CU HVDC Project. Both are highvoltage direct current (HVDC) transmission systems, which link the states of North Dakota and Minnesota.
Under the terms of the contracts, awarded for the Square Butte HVDC Scheme by Minnkota Power Cooperative Inc. (Grand Forks,...