Web of power: How to manage the energy internet

October 18, 2016

A fallen tree, a lightning strike -- whatever the reason, it doesn't take much to disrupt the electrical grid. An outage could last just a few minutes, but restoring electricity to millions of people typically takes hours, days, or even weeks. The outdated system, developed a century ago, is long due for an overhaul.

Enter the energy internet. It's based on the idea that electricity could be distributed similarly to the actual internet. The energy internet hasn't yet reached reality, but scientists at Northeastern University in Shenyang, China, have proposed a way to help actualize the theory.

"[The energy internet] brings new challenges to the study of some basic problems in power systems, one of which is... energy management," wrote Huaguang Zhang, the director of the Electrical Automation Institute at Northeastern University. Zhang and his team published their proposal in IEEE/CAA Journal of Automatica Sinica (JAS). "Unlike conventional power systems, the upcoming energy internet emphasizes comprehensive utilization of energy in the whole power system by coordinating multi-microgrids."

A main power grid could partner with decentralized generators, ranging from fuel to wind turbines and solar power, to delegate energy to multiple microgrids within each designated network.

"Each microgrid can either inject spare power (if working in low loads) into or absorb lacking power (if working in high loads) from other microgrids or the main grid," wrote Zhang.

In their paper, Zhang and his team determined how to best optimize this power exchange between the main grid and the multiple microgrids using computer science algorithms.

The algorithms are consensus based, meaning the decentralized generators within the system agree that one of them will represent their ideal state. This leader communicates with the main grid and collects the power costs of each generator to set the price of electricity within the network.

The next algorithm allows for each generator to precisely calculate their local needs compared to the global supply and demand by collecting information from their networked microgrids. Based on this information, they can request more energy, or sell surplus energy to the main grid to be sent to a different generator.

The researchers simulated their proposed management method between seven separate systems under different time constraints and energy loads. Every time, the algorithms proved effective.

"The proposed approach is implemented in a distributed fashion, which only requires local communication among neighbors," wrote Zhang. "Thus, it is more cost-effective, reliable, and robust compared to the centralized approaches."
Fulltext of the paper is available: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=7589482&tag=1


IEEE/CAA Journal of Automatica Sinica (JAS) is a joint publication of the Institute of Electrical and Electronics Engineers, Inc (IEEE) and the Chinese Association of Automation. JAS publishes papers on original theoretical and experimental research and development in all areas of automation. The coverage of JAS includes but is not limited to: Automatic control/Artificial intelligence and intelligent control/Systems theory and engineering/Pattern recognition and intelligent systems/Automation engineering and applications/Information processing and information systems/Network based automation/Robotics/Computer-aided technologies for automation systems/Sensing and measurement/Navigation, guidance, and control.

To learn more about JAS, please visit: http://ieeexplore.ieee.org/xpl/RecentIssue.jsp?punumber=6570654


Chinese Association of Automation

Related Electricity Articles from Brightsurf:

Mirror-like photovoltaics get more electricity out of heat
New heat-harnessing 'solar' cells that reflect 99% of the energy they can't convert to electricity could help bring down the price of storing renewable energy as heat, as well as harvesting waste heat from exhaust pipes and chimneys.

Engineers use electricity to clean up toxic water
Powerful electrochemical process destroys water contaminants, such as pesticides. Wastewater is a significant environment issue.

Considering health when switching to cleaner electricity
Power plants that burn coal and other fossil fuels emit not only planet-warming carbon dioxide, but also pollutants linked to breathing problems and premature death.

Windows will soon generate electricity, following solar cell breakthrough
Semi-transparent solar cells that can be incorporated into window glass are a 'game-changer' that could transform architecture, urban planning and electricity generation, Australian scientists say in a paper in Nano Energy.

Static electricity as strong as lightening can be saved in a battery
Prof. Dong Sung Kim and his joint research team presented a new technology that can increase the amount of power generated by a triboelectric nanogenerator.

To make amino acids, just add electricity
By finding the right combination of abundantly available starting materials and catalyst, Kyushu University researchers were able to synthesize amino acids with high efficiency through a reaction driven by electricity.

Using renewable electricity for industrial hydrogenation reactions
The University of Pittsburgh's James McKone's research on using renewable electricity for industrial hydrogenation reactions is featured in the Journal of Materials Chemistry A's Emerging Investigators special issue.

Water + air + electricity = hydrogen peroxide
A reactor developed by Rice University engineers produces pure hydrogen peroxide solutions from water, air and energy.

Producing electricity at estuaries using light and osmosis
Researchers at EPFL are working on a technology to exploit osmotic energy -- a source of power that's naturally available at estuaries, where fresh water comes into contact with seawater.

Experimental device generates electricity from the coldness of the universe
A drawback of solar panels is that they require sunlight to generate electricity.

Read More: Electricity News and Electricity Current Events
Brightsurf.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com.