2025年1月26日 · There is, however, more than one way to skin a cat, as it has been said, and there is more than one way to transport energy.. Just ask the Chinese, who these days have a more than 3,000 kilometer long (nearly 1,900 mile), ultrahigh-voltage direct current (HVDC) powerline moving energy from coal-fired power plants, along with an increasing number of wind and solar farms, in Northwest China to ...