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Micro Power System with LVDC Link

Short description (max. 250 characters)
Today’s energy supply in houses and companies is too distributed and therefore lossy and not smart, every electrical device and generating system is connected to the grid on its own. The answer lies in one shared LVDC-link, centrally smart controlled

Key benefits (max. 250 characters)
The system’s main advantages are:
- Less hardware components needed
- Higher energy efficiency = save energy
- Load shifting
- Easy energy monitoring / management
- Micro smart grid functionality

Detailed description (max. 500 words)
Since the ‘War of Currents’ between alternating and direct current (DC) has been decided in the late 19th century in favor of the alternating current (AC), today every public electrical grid is an AC grid. The main reason for this decision was the easy voltage level conversion made possible by the power transformer.
However, as power electronics is today an up-to-date key technology, DC/DC conversion no longer poses a problem. Therefore, not only on high voltage level a DC transmission as in a HVDC link makes sense – today’s answer should be a Low Voltage DC Links (LVDC).
This innovative idea proposes a micro power system based on a LVDC link – for home use as well as in an industrial application. The main aspect is the shared 600 V DC link. In a home use scenario, photovoltaics and wind power from the rooftop are combined and feed in while consumer electronics, LED-lighting and electrical appliances are powered by the DC link. For industrial use, production machines and automation technology can be powered by the DC link and feed into it as well.
To balance load peaks, storage systems like super caps, accumulators and mechanical storages can be added to the DC link. So, as a side effect, the system also acts like an uninterrupted power supply unit and improves the availability of production lines.
This sustained and trendsetting solution can be implemented with today’s state of technology in short time. The potential to save costs for both home and industrial use (“green factory”) is tremendous, and it can easily be connected to a smart grid. Even more, it already represents a “sub” smart grid. Thinking through the idea, it also comes to mind that many components like power supply units can be omitted – consumers can be directly connected via DC/DC converter to the DC link.

For more information, feel free to read our additional pdf-document and/or contact us!

energy consumption, energy generation, energy saving, future, LED, powered house, production chain, renewable energy, resource efficiency

Buildings, Factory of the future, Energy storage, Renewable energy


Status: in discussion

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Number: 000075

submitted: 04.07.2012