CU (Powerline)

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CU is the designation of a line for high-voltage direct current (HVDC) transmission between the Coal Creek Station power plant south of Underwood, North Dakota at 47°22′24″N 101°9′23″W / 47.37333°N 101.15639°W / 47.37333; -101.15639 (Underwood Static Inverter Plant) and the Dickinson converter station near Rockford, Minnesota at 45°06′40″N 93°48′36″W / 45.11111°N 93.81000°W / 45.11111; -93.81000 (Dickinson Static Inverter Plant).

The designation most likely refers to two Minnesota-based power generation/transmission cooperatives that originally partnered to build the Coal Creek plant and associated line - Cooperative Power Association and United Power Association, which later merged to become Great River Energy.

The CU project controversy in 1978 and 1979 was a result of protests by farm landowners in the path of the CU line right of way.

The CU line, which went in service in 1978, can transfer an electrical power of 1,000 megawatts at a symmetrical transmission voltage of 400 kV. An overhead line connection 436 miles (710 kilometers) long is used, with two conductors per pole. Thyristor static inverters are used.

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Wikipedia