Conductor efficiency can substantially reduce CO2 emissions. In the world of commodity transmission conductors, conductor efficiency is generally not considered to be high on the priority list. Conductor selection is generally based on load considerations. But times are changing. Looking back a few years, consider the substantial investments that were made to improve the efficiency of generators to reduce fuel consumption and/or help improve the economic viability of competing generation technologies such as solar and wind. Improved transformer technologies, while slightly more expensive, were also easy to justify – as they offered reduced lifecycle costs and improved efficiency. On the demand side, consider that billions of dollars have been spent to improve the efficiency of demand side appliances such as refrigerators, air conditioning units and even light bulbs. On the conductor side, very little consideration historically has been given to conductor efficiency and line losses as these costs are generally passed through to the consumer.
Comparison of ACCC, ACSR and ACCR conductors. In the past, T&D designers had few choices.
All aluminum conductors such as AAC and steel reinforced conductors such as ACSR. In the 1970’s and 1980’s new conductors were introduced that could be operated at higher temperatures (to carry more current) such as ACSS. Additionally, Gap type conductor and Invar steel conductors were also introduced. While Gap conductor is a bit difficult to install and Invar conductors exhibit very high magnetic hysterisis losses, new composite core conductors were subsequently introduced in the early 2000’s. These included 3M’s ACCR conductor which replaced the conventional steel core strands with ceramic fiber reinforced aluminum strands and the CTC Global ACCC conductor which uses a single carbon and glass fiber (hybrid) core embedded in a high-temperature thermoset resin matrix to optimize performance and improve efficiency. To assess the differences between different conductor types, Ontario Hydro in Canada performed a test at Kinectrics Lab.
CTC Global’s ACCC Informational Resources and Support. Know about CTC Global’s ACCC testing process. Testing ACCC conductor, its composite core and ancillary hardware components began in 2003 and continues to this day.
The magnitude of the testing is remarkable and the results outstanding. Initial testing was undertaken to ensure performance targets were met and enable CTC Global to share the results with customers. Industry standard test protocols were also completed to assess overall conductor and hardware performance. Additional test protocols were developed to provide further insight into performance and longevity.
Examples include work done by EPRI and EDF in collaboration to better understand the properties of composite materials. CTC Global - Core Manufacturing Joint Venture. Jiangsu NARI CTC Composite Material Co, Ltd Established in 2014 to help meet China’s increasing electricity needs with state-of-the-art ACCC® conductor, CTC Global partnered with the NARI Group, a wholly-owned subsidiary of the State Grid Corporation of China, the world’s largest electric utility company.
Jiangsu NARI CTC Composite Material Co, Ltd, begin commercial operations in early 2014 to produce high-capacity, energy-efficient, and highly-proven ACCC conductor core in China, exclusively for the Chinese market. China is the world’s most populous country and largest energy consumer. China’s annual economic growth rate has averaged 10 percent every year since 2000, which has spurred increased demand for electricity. Know about CTC Global's Events. NRECA Distributech San Diego, California January 31 – February 2, 2017 National Electric Transmission Infrastructure Summit Washington, D.C.
February 8 – 10, 2017 PE Power Delivery & Design Conference Sun Valley, Idaho March 1 – 2, 2017 RMEL Transmission Planning & Operations Conference Lone Tree, Colorado March 8 – 9, 2016. A few points to learn about CTC Global History. Market need drove us to innovate Recognizing the enormous challenge of increasing transmission line capacity, mitigating thermal sag, and improving conductor efficiency, CTC, of Irvine, California, USA, (now CTC Global) began developing the patented ACCC® conductor in 2002.
The objective was to develop a conductor that could be used to upgrade existing transmission corridors without structural modifications. This objective relied on the incorporation of highly evolved aerospace technology and materials science to create a new higher-strength, lighter-weight core that could incorporate additional conductive aluminum without a weight or diameter penalty, and be utilized to reduce thermal sag, increase spans between fewer structures, carry more current, reduce line losses and improve grid reliability. Know more about CTC Global Manufacturing Partners.