Advanced Energy Perspectives

Advanced Energy Technology of the Week: High Voltage Direct Current Transmission

Posted by Maria Robinson

Apr 21, 2015 3:41:33 PM

The U.S. Environmental Protection Agency’s (EPA’s) plan to regulate carbon emissions is just the latest challenge facing the U.S. electric power system. Technological innovation is disrupting old ways of doing business and accelerating grid modernization. Last year, AEE released Advanced Energy Technologies for Greenhouse Gas Reduction, a report detailing the use, application, and benefits of 40 specific advanced energy technologies and services. This post is one in a series drawn from the technology profiles within that report.

High-VoltageDirectCurrentTransmission

There are two types of currents that can be used when transmitting electricity: Alternating Current (AC) and Direct Current (DC). The electric grid developed around AC power because it was easier to manipulate and transport efficiently given technological limitations with DC transformers that persisted until the 1980s. Technological advancements have now made high-voltage DC (HVDC) lines a viable option for efficiently transporting power over long distances.

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Topics: Advanced Energy Technology of the Week

Advanced Energy Technology of the Week: High Temperature Superconducting (HTS) Transmission

Posted by Maria Robinson

Apr 15, 2015 5:37:37 PM

The U.S. Environmental Protection Agency’s (EPA’s) plan to regulate carbon emissions is just the latest challenge facing the U.S. electric power system. Technological innovation is disrupting old ways of doing business and accelerating grid modernization. Last year, AEE released Advanced Energy Technologies for Greenhouse Gas Reduction, a report detailing the use, application, and benefits of 40 specific advanced energy technologies and services. This post is one in a series drawn from the technology profiles within that report.

HighTemperatureSuperconductors

 

Superconductivity is a property of some materials whereby electrical resistance, which normally decreases gradually with decreasing temperature, suddenly drops to zero below a critical temperature. Advances in materials have created high-temperature superconductors (HTS), whose relatively “warm” critical temperatures of -315° to -230°F allow for the use of less expensive and easier to handle refrigerants such as liquid nitrogen. HTS transmission passes electricity through a cable that is insulated with high-pressure liquid nitrogen pumped by refrigeration equipment. The insulation allows HTS transmission to carry 10 times the power of a standard cable of similar thickness with almost no power losses. These lines can connect directly to the existing AC transmission network to add highly efficient transmission capacity that can relieve congestion without the need for high voltages.

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Topics: Advanced Energy Technology of the Week

Advanced Energy Technology of the Week: Energy Storage

Posted by Maria Robinson

Apr 8, 2015 5:29:56 PM

The U.S. Environmental Protection Agency’s (EPA’s) plan to regulate carbon emissions is just the latest challenge facing the U.S. electric power system. Technological innovation is disrupting old ways of doing business and accelerating grid modernization. Earlier this year, AEE released Advanced Energy Technologies for Greenhouse Gas Reduction, a report detailing the use, application, and benefits of 40 specific advanced energy technologies and services. This post is one in a series drawn from the technology profiles within that report.

EnergyStorage-926314-edited

Several technologies can be used to store energy on the electricity transmission and distribution grid, including pumped storage hydro (PSH), compressed air energy storage (CAES), electrochemical batteries, flywheel systems and thermal energy storage systems. Electricity is then generated during peak hours by releasing the water through a hydro turbine. CAES stores energy by using an electric motor to drive an air compressor that fills a storage facility (typically an underground cavern) with compressed air.

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Topics: Advanced Energy Technology of the Week

Advanced Energy Technology of the Week: Electric Vehicles

Posted by Maria Robinson

Mar 31, 2015 5:20:38 PM

The U.S. Environmental Protection Agency’s (EPA’s) plan to regulate carbon emissions is just the latest challenge facing the U.S. electric power system. Technological innovation is disrupting old ways of doing business and accelerating grid modernization. Earlier this year, AEE released Advanced Energy Technologies for Greenhouse Gas Reduction, a report detailing the use, application, and benefits of 40 specific advanced energy technologies and services. This post is one in a series drawn from the technology profiles within that report.

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Topics: Advanced Energy Technology of the Week

Advanced Energy Technology of the Week: Distribution Automation and Network Efficiency

Posted by Maria Robinson

Mar 24, 2015 1:48:16 PM

The U.S. Environmental Protection Agency’s (EPA’s) plan to regulate carbon emissions is just the latest challenge facing the U.S. electric power system. Technological innovation is disrupting old ways of doing business and accelerating grid modernization. Earlier this year, AEE released Advanced Energy Technologies for Greenhouse Gas Reduction, a report detailing the use, application, and benefits of 40 specific advanced energy technologies and services. This post is one in a series drawn from the technology profiles within that report.

DistributionAutomationandNetworkEfficiency

In recent years, many transmission networks have been upgraded with new sensors and automated control equipment, which allow for more efficient centralized control. Distribution networks, however, are further behind in deploying these systems, which could improve system operations. Distribution automation technology includes a combination of line sensors, new control equipment, and intelligent software that constantly optimizes distribution system operations for reliability and efficiency.

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Topics: Advanced Energy Technology of the Week

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Advanced Energy Perspectives is AEE's blog presenting news, analysis, and commentary on creating an advanced energy economy. Join the conversation!

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