Featured Research

from universities, journals, and other organizations

As smart electric grid evolves, engineers show how to include solar technologies

Date:
August 17, 2012
Source:
Virginia Tech (Virginia Polytechnic Institute and State University)
Summary:
Scientists have developed an economically feasible way to store solar energy in existing residential power networks.

An economically feasible way to store solar energy in existing residential power networks is the subject of an award winning paper written by two Virginia Tech electrical engineers and presented at an international conference.

Reza Arghandeh of Blacksburg, Va., a doctoral candidate in the Bradley Department of Electrical and Computer Engineering at Virginia Tech, won the best student paper award at the 20th International Conference on Nuclear Engineering, held in conjunction with the American Society of Mechanical Engineering Power 2012 Conference at Anaheim, Calif.. His advisor is Robert Broadwater, professor of electrical and computer engineering, who specializes in electric power system analysis and design.

In their paper, they acknowledge that solar energy resources are "intermittent, seasonal, and non-dispatchable." However, the current national climate with its deregulation policies, electricity tariffs, control strategies and demand management are "significant tools for flexible and resilient operation of power systems with photovoltaic adoption levels," Arghandeh argued.

"Selling the household generated electricity into the electric energy market and the storage of electricity in storage systems and demand control systems provide a variety of economic opportunities for customers and utility companies to use more renewable resources," he added.

Some residential houses are already doing just this -- selling power back to an electrical distribution industry. But Arghandeh and Broadwater's work provides an optimization algorithm for a Distributed Energy Storage (DES) system on a broad scale. The system they developed presents a fleet of batteries connected to distribution transformers. The storage system can then be used for withholding distributed photovoltaic power before it is bid to market, Arghandeh explained.

"Withholding distributed photovoltaic power, probably gained from rooftop panels, represents a gaming method to realize higher revenues due to the time varying cost of electricity," he said.

Arghandeh is referring to the peak usage of energy systems such as the early evening hours when families return home from school and from work versus the low usage times that occur in the early morning hours when most households are asleep. "The distributed photovoltaic power adoption can be controlled with the help of real-time electricity price and load profile," he confirmed.

Today's power systems are moving towards a smart grid concept to improve their efficiencies, reliability, economics, and sustainability. Arhhandeh and Broadwater want to make sure that solar technologies are integrated with the existing technologies like energy storage and control systems.

Specifically, the distributed energy storage system computation they devised is called a discrete ascent optimal programming approach. It insures convergence of the various power systems after a finite number of computational iterations. A solution determined by using their approach depends upon the day ahead forecast of load variation, market prices, and photovoltaic generation.

The output of their optimization algorithm is a distributed energy storage charging and discharging schedule with maximized operation benefits.

Electrical Distribution Design (EDD) of Blacksburg, Va., a leading edge software company serving the utility industry, funded this research.


Story Source:

The above story is based on materials provided by Virginia Tech (Virginia Polytechnic Institute and State University). Note: Materials may be edited for content and length.


Cite This Page:

Virginia Tech (Virginia Polytechnic Institute and State University). "As smart electric grid evolves, engineers show how to include solar technologies." ScienceDaily. ScienceDaily, 17 August 2012. <www.sciencedaily.com/releases/2012/08/120817203903.htm>.
Virginia Tech (Virginia Polytechnic Institute and State University). (2012, August 17). As smart electric grid evolves, engineers show how to include solar technologies. ScienceDaily. Retrieved July 31, 2014 from www.sciencedaily.com/releases/2012/08/120817203903.htm
Virginia Tech (Virginia Polytechnic Institute and State University). "As smart electric grid evolves, engineers show how to include solar technologies." ScienceDaily. www.sciencedaily.com/releases/2012/08/120817203903.htm (accessed July 31, 2014).

Share This




More Earth & Climate News

Thursday, July 31, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Big Waves In Arctic Ocean Threaten Polar Ice

Big Waves In Arctic Ocean Threaten Polar Ice

Newsy (July 30, 2014) Big waves in parts of the Arctic Ocean are unprecedented, mainly because they used to be covered in ice. Video provided by Newsy
Powered by NewsLook.com
Raw: Thousands Flocking to German Crop Circle

Raw: Thousands Flocking to German Crop Circle

AP (July 30, 2014) Thousands of people are trekking to a Bavarian farmer's field to check out a mysterious set of crop circles. (July 30) Video provided by AP
Powered by NewsLook.com
Amid Drought, UCLA Sees Only Water

Amid Drought, UCLA Sees Only Water

AP (July 30, 2014) A ruptured 93-year-old water main left the UCLA campus awash in 8 million gallons of water in the middle of California's worst drought in decades. (July 30) Video provided by AP
Powered by NewsLook.com
In Virginia, the Rise of a New Space Coast

In Virginia, the Rise of a New Space Coast

AP (July 30, 2014) Every summer, tourists make the pilgrimage to Chincoteague Island, Va. to see wild ponies cross the Assateague Channel. But, it's the rockets sending to supplies to the International Space Station that are making this a year-round destination. (July 30) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

    Environment News

    Technology News



    Save/Print:
    Share:

    Free Subscriptions


    Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

    Get Social & Mobile


    Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

    Have Feedback?


    Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
    Mobile: iPhone Android Web
    Follow: Facebook Twitter Google+
    Subscribe: RSS Feeds Email Newsletters
    Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins