Siemens is also offering high-voltage direct current technology, but ABB is a step ahead.

FORBES: Magazine Article

Its high-voltage direct current system is delivering electricity to the British Petroleum platform in the middle of the ocean.

FORBES: Magazine Article

One of ABB's specialties is high-voltage direct current links, so-called HVDC.

FORBES: Magazine Article

Infineon also provides the thyristor chips that allow transformers to handle high-voltage direct-current power lines.

FORBES: Magazine Article

Their job is to convert high-voltage alternating current from the mains into low-voltage direct current for mobile phones, laptops, iPods and other electronic gadgets.

ECONOMIST: How a boring gadget saved $2 billion-worth of electricity