Public Power - June 2008 - (Page 61) Coming of Age: SUPERCONDUCTING CABLES BY CHUCK STANKIEWICZ AND JACK MCCALL Long Island Power Authority energized the world’s first high-temperature superconducting transmission cable in April. The 574-MW system has three parallel cables in a four-foot wide underground right-of-way. The three cables shown entering the ground can carry as much power as all of the overhead lines on the far left. Photo courtesy American Superconductor Corp. power grids, rising reliability and growing environmental concerns are compelling utility planners to examine a variety of solutions for handling the power flow problems affecting the communities they serve. Public power authorities—accountable to the local governments and customers who own them—shoulder a special responsibility when weighing the feasibility of new technologies for their service areas. While they must resist jumping onto the latest technology fads, today’s soaring power demands require that they find new solutions to increasingly urgent www.APPAnet.org Congested needs—like meeting growing demand for power within existing underground rights of way. One such solution has been quietly evolving from developmental to commercial status: power cables that incorporate high temperature superconductor (HTS) wires. HTS wire can deliver up to 150 times more electrical current than copper wire of the same size. These smaller, higher power cables are helping manage grid congestion with low environmental impact and, in many instances, reduce installation and operating costs. Because of their lower impedance, HTS cables can be placed strategically in the transmission grid to draw power flow from overtaxed conventional cables or overhead lines, alleviating urban bottlenecks. This smaller footprint provides an ideal solution for urban and metropolitan areas where obtaining additional underground space for utility cables is difficult or impractical. A growing number of in-grid projects around the world demonstrate that HTS power cables deserve serious consideration. Decades of delayed investments and deferred upgrades have left the electricity grid JUNE 2008 61 http://www.APPAnet.org
Table of Contents Feed for the Digital Edition of Public Power - June 2008 Public Power - June 2008 Contents Perspective 10 Questions Finding Common Ground on Climate Change Solutions A Patchwork Approach to Renewable Energy Whose Grid Is It Anyway? The Little Utility That Could Benchmarking Customer Service Can Prairie Hay Power Your Town? Storming the Control Room Investing in the Smart Grid Coming of Age: Superconducting Cables Community Broadband Economic Development Customer Service Human Resources For Governing Boards Safety Parting Shot Public Power - June 2008 Public Power - June 2008 - Public Power - June 2008 (Page Cover1) Public Power - June 2008 - Public Power - June 2008 (Page Cover2) Public Power - June 2008 - Public Power - June 2008 (Page 1) Public Power - June 2008 - Public Power - June 2008 (Page 2) Public Power - June 2008 - Contents (Page 3) Public Power - June 2008 - Contents (Page 4) Public Power - June 2008 - Contents (Page 5) Public Power - June 2008 - Contents (Page 6) Public Power - June 2008 - Contents (Page 7) Public Power - June 2008 - Contents (Page 8) Public Power - June 2008 - Contents (Page 9) Public Power - June 2008 - Perspective (Page 10) Public Power - June 2008 - Perspective (Page 11) Public Power - June 2008 - 10 Questions (Page 12) Public Power - June 2008 - 10 Questions (Page 13) Public Power - June 2008 - 10 Questions (Page 14) Public Power - June 2008 - 10 Questions (Page 15) Public Power - June 2008 - Finding Common Ground on Climate Change Solutions (Page 16) Public Power - June 2008 - Finding Common Ground on Climate Change Solutions (Page 17) Public Power - June 2008 - Finding Common Ground on Climate Change Solutions (Page 18) Public Power - June 2008 - Finding Common Ground on Climate Change Solutions (Page 19) Public Power - June 2008 - Finding Common Ground on Climate Change Solutions (Page 20) Public Power - June 2008 - Finding Common Ground on Climate Change Solutions (Page 21) Public Power - June 2008 - Finding Common Ground on Climate Change Solutions (Page 22) Public Power - June 2008 - Finding Common Ground on Climate Change Solutions (Page 23) Public Power - June 2008 - Finding Common Ground on Climate Change Solutions (Page 24) Public Power - June 2008 - Finding Common Ground on Climate Change Solutions (Page 25) Public Power - June 2008 - A Patchwork Approach to Renewable Energy (Page 26) Public Power - June 2008 - A Patchwork Approach to Renewable Energy (Page 27) Public Power - June 2008 - A Patchwork Approach to Renewable Energy (Page 28) Public Power - June 2008 - A Patchwork Approach to Renewable Energy (Page 29) Public Power - June 2008 - Whose Grid Is It Anyway? (Page 30) Public Power - June 2008 - Whose Grid Is It Anyway? (Page 31) Public Power - June 2008 - Whose Grid Is It Anyway? (Page 32) Public Power - June 2008 - Whose Grid Is It Anyway? (Page 33) Public Power - June 2008 - Whose Grid Is It Anyway? (Page 34) Public Power - June 2008 - Whose Grid Is It Anyway? (Page 35) Public Power - June 2008 - The Little Utility That Could (Page 36) Public Power - June 2008 - The Little Utility That Could (Page 37) Public Power - June 2008 - The Little Utility That Could (Page 38) Public Power - June 2008 - The Little Utility That Could (Page 39) Public Power - June 2008 - The Little Utility That Could (Page 40) Public Power - June 2008 - The Little Utility That Could (Page 41) Public Power - June 2008 - Benchmarking Customer Service (Page 42) Public Power - June 2008 - Benchmarking Customer Service (Page 43) Public Power - June 2008 - Benchmarking Customer Service (Page 44) Public Power - June 2008 - Benchmarking Customer Service (Page 45) Public Power - June 2008 - Can Prairie Hay Power Your Town? (Page 46) Public Power - June 2008 - Can Prairie Hay Power Your Town? (Page 47) Public Power - June 2008 - Can Prairie Hay Power Your Town? (Page 48) Public Power - June 2008 - Can Prairie Hay Power Your Town? (Page 49) Public Power - June 2008 - Storming the Control Room (Page 50) Public Power - June 2008 - Storming the Control Room (Page 51) Public Power - June 2008 - Storming the Control Room (Page 52) Public Power - June 2008 - Storming the Control Room (Page 53) Public Power - June 2008 - Storming the Control Room (Page 54) Public Power - June 2008 - Storming the Control Room (Page 55) Public Power - June 2008 - Investing in the Smart Grid (Page 56) Public Power - June 2008 - Investing in the Smart Grid (Page 57) Public Power - June 2008 - Investing in the Smart Grid (Page 58) Public Power - June 2008 - Investing in the Smart Grid (Page 59) Public Power - June 2008 - Investing in the Smart Grid (Page 60) Public Power - June 2008 - Coming of Age: Superconducting Cables (Page 61) Public Power - June 2008 - Coming of Age: Superconducting Cables (Page 62) Public Power - June 2008 - Coming of Age: Superconducting Cables (Page 63) Public Power - June 2008 - Community Broadband (Page 64) Public Power - June 2008 - Community Broadband (Page 65) Public Power - June 2008 - Community Broadband (Page 66) Public Power - June 2008 - Community Broadband (Page 67) Public Power - June 2008 - Economic Development (Page 68) Public Power - June 2008 - Economic Development (Page 69) Public Power - June 2008 - Customer Service (Page 70) Public Power - June 2008 - Human Resources (Page 71) Public Power - June 2008 - For Governing Boards (Page 72) Public Power - June 2008 - For Governing Boards (Page 73) Public Power - June 2008 - For Governing Boards (Page 74) Public Power - June 2008 - Safety (Page 75) Public Power - June 2008 - Safety (Page 76) Public Power - June 2008 - Safety (Page 77) Public Power - June 2008 - Safety (Page 78) Public Power - June 2008 - Safety (Page 79) Public Power - June 2008 - Parting Shot (Page 80) Public Power - June 2008 - Parting Shot (Page Cover3) Public Power - June 2008 - Parting Shot (Page Cover4)
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