Nexans, Siemens and American Superconductor Corporation (NASDAQ: AMSC) today announced the successful qualification of a transmission voltage resistive fault current limiter (FCL) that utilizes high temperature superconductor (HTS) wire. This marks the first time a resistive superconductor FCL has been developed and successfully tested for power levels suitable for application in the transmission grid (138 kV insulation class and nominal current of 900 A).
As electrical demand increases, more power generation must be added to the grid. The addition of generation capacity also tends to increase the destructive over-current available when a fault occurs on the power system, taxing the capabilities of installed equipment, such as circuit breakers. Faults can be caused by equipment failures, severe weather, accidents or even acts of willful destruction. Such faults can damage major, expensive components and, if not cleared quickly, can lead to lengthy, costly outages.
Used in a substation, FCL’s acts as current surge protectors for the power grid. A resistive FCL consists of low inductance superconducting coils that work in parallel with a shunt reactor. Unlike other approaches, this type of system has low impedance, meaning it is virtually transparent to the grid until it “sees” a fault. At this point, the superconductor coils transition from a conductive to a resistive state to suppress the fault current.
The system that was tested by Nexans, Siemens and AMSC proved to reduce fault current levels by more than 50 percent. This smart grid system can strengthen the grid by reducing the destructive nature of faults, extending the life of existing substation equipment and allowing utilities to defer or eliminate equipment replacements or upgrades. The resistive nature of this superconductor-based FCL can also improve the ability of the high voltage transmission power grid to remain stable, reducing the likelihood of more widespread system collapse.The collaboration between the three industry leaders resulted in a solution that has virtually no electrical impact to a large electric utility grid under normal operation but limits currents in response to a downstream short circuit, limiting damage and the stress that other grid components experience.
Select the service that is right for you!COMPARE ALL SERVICES
Jim Cramer and Stephanie Link actively manage a real portfolio and reveal their money management tactics while giving advanced notice before every trade.
- $2.5+ million portfolio
- Large-cap and dividend focus
- Intraday trade alerts from Cramer
- Weekly roundups
Access the tool that DOMINATES the Russell 2000 and the S&P 500.
- Buy, hold, or sell recommendations for over 4,300 stocks
- Unlimited research reports on your favorite stocks
- A custom stock screener
- Upgrade/downgrade alerts
Jim Cramer's protege, David Peltier, identifies the best of breed dividend stocks that will pay a reliable AND significant income stream.
- Diversified model portfolio of dividend stocks
- Alerts when market news affect the portfolio
- Bi-weekly updates with exact steps to take - BUY, HOLD, SELL
All of Real Money, plus 15 more of Wall Street's sharpest minds delivering actionable trading ideas, a comprehensive look at the market, and fundamental and technical analysis.
- Real Money + Doug Kass + 15 more Wall Street Pros
- Intraday commentary & news
- Ultra-actionable trading ideas
Our options trading pros provide daily market commentary and over 100 monthly option trading ideas and strategies to help you become a well-seasoned trader.
- 100+ monthly options trading ideas
- Actionable options commentary & news
- Real-time trading community
- Options TV