While the rest of the world is moving ahead with extensive transmission builds employing high-voltage direct-current (HVDC) technology, the U.S. lags in using this technology to strengthen the electric grid. This is especially true of the Eastern Interconnection, where HVDC transmission is still uncommon.

The benefits of HVDC are widely recognized, foremost among them is that it provides controllability that increases the throughput of the underlying alternating-current (AC) grid. Thus, it can help to resolve some of the issues grid operators and transmission owners face in keeping pace with the demands being placed on transmission infrastructure.

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