How China Powers Its Electric Cars and High-Speed Trains

2 comments

1. In energy, China is the future, U.S. is the past – chapter CXVII

2. This is poor reporting.

   The brilliant part of HVDC is that there is no alternating magnetic field. It’s static and small. AC high voltage lines are the dangerous ones with their alternating oscillating magnetic field that bleeds off energy into the hands of youtubers holding 4′ fluorescent tubes or tickling fishermen with carbon fibre fishing rods. DC has no such trickery. You can bury the cable, run under oceans, anything you like. It is the safer tech as long as you don’t get within the spark range of bare metal.

   Siemens 1.1MV HVDC equipment can shoot power 3000km with under 10% loss including conversion from AC DC. Any line longer than around 600-800km is worthwhile to upgrade due to conversion losses. The ultimate green energy grid should have these major energy freeways running east west and north south. Share solar and wind from coast to coast. Leverage 18 hour sunlight in the Canadian summers or the deserts of Mexico in winter. The sun is always shining and the wind is always blowing somewhere.

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