Direct current technology
Direct current (DC) is an efficient, reliable and preferred technology for moving large amounts of power across long distances. We believe it will play an important role in the future.
Our mission is to develop direct current technology into a viable business that will assist the society in reducing energy costs, and thus further promote smart energy.
You had Thomas Edison and GE on one side, pushing for the power transmission and distribution system to be based on DC. On the other side, Nikola Tesla and Westinghouse put all their effort into promoting AC. With electricity supplies in their infancy, much depended on choosing the right technology to power homes and businesses across the country.
The War of the Currents was won by AC, which has been the platform for electrical transmission across the world since that time. But while AC was perfectly adequate for the conditions of the day – and for much of the 20th century – the needs of the 21st century are showing its limits.
The irony is that, although Edison lost the battle, his direct current is making a comeback:
- It provides greater energy efficiency and higher power qualityIt needs smaller equipment
- It needs smaller equipment
- It is less complex and running at lower costs
Today, it is not a question of AC versus DC, but of AC and DC.
On the production side, more and more electricity is being generate from renewable sources of energy either in remote areas in mountains far from urban centers, offshore wind farms) or locally (rooftopsolar panels). DC is the only technology that allows power to be transmitted economically over very long distances, and DC is the type of power produced by photovoltaic panels.
More and more equipment runs on DC, such as computers, cell phones and LED lights. At the moment, each of these appliances uses its own rectifier to switch power from AC to DC. A much more eficient solution would be to convert the power in a larger rectifier as it enters each building. Losses could be further reduced by converting power to DC at the substation level and distributing DC power throughout an entire district, or even by transmitting distributing and using power as DC.
Batteries are another technology that runs on DC power. And there are more and more of them around, storing excess power produced from renewable energy installations during favourable weather conditions and powering electric cars. DC distribution would be particularly attractive for communities using power generated by photovoltaic solar panels, since this is already DC power and currently has to be converted to AC before distribution.