Presentation on theme: "EE 392 Stewardship Transmission Towers, Power Lines & Birds David Dukes Michael Harper."— Presentation transcript:
EE 392 Stewardship Transmission Towers, Power Lines & Birds David Dukes Michael Harper
Basic Facts Not only costly to birds but costly to power companies Actual statistics on bird death are hard to calculate US Forest Service estimates power lines to kill hundreds of thousands to 175 million birds per year 10.7% of line outages are due to birds 60% of bird deaths are from collisions with the overhead shield wire (OHSW) or optical ground wire (OPGW) Power lines are estimated to electrocute tens of thousands to hundreds of thousands annually Most of these electrocutions occur on distribution lines as opposed to transmission lines as the phases are spaced closer together Birds like to use transmission structures as perches. It is common for osprey to build their nests on these structures.
Zena Bird Perch Preventers Prevent birds from perching and nesting on power structures Reduces bird deaths Reduces power outages Environmentally friendly Zenadesign.com
FireFly Bird Flight Diverter Reflective tag hung on OHSW or OPGW to increase visibility Can also be installed on side guys and bridle guys Glows in low light conditions for up to 12 hours Rotates on the line in the wind Installed live Pr-tech.com
Preformed Bird Flight Diverters Increases visibility to reduce the number of bird collisions with power lines Installed on OHSW or OPGW for high voltage applications Can be installed directly on live conductors in low voltage applications Also acts as a damper to reduced vibrations in the line Preformed.com
Nesting Platforms Separate structures built away from power lines give birds a safer place to perch and nest Similar designs to the one below have been made in which bird or even owl houses can be hung from the structure Often constructed from salvaged power line material to cut costs
Bird Trap Structures Power structures like the one to the right are dangerous for birds This design is mostly seen on distribution lines or lower voltage transmission lines (69kV) Birds can perch on the lower cross arm and when they fly away are at a greater risk of colliding with 2 of the higher phases Removal of structures like these will lead to less bird electrocutions Alternative designs have been created
Cantega GreenJacket Cover Up – “It fits” 20% of substation outages are caused by wildlife prior to installation After installation outages and wild life fatality were greatly reduced Offers a solution to cover up energized areas in substations Standard cover up available or they will come to your substation and provide a custom solution based on your needs Live Installation Cantega.com
References -AltaLink (http://www.altalink.ca)http://www.altalink.ca -US Forestry Department (http://www.fs.fed.us)http://www.fs.fed.us -Cantega Industries (http://www.cantega.com)http://www.cantega.com -Preformed Line Products (http://www.preformed.com)http://www.preformed.com -PR Tech (http://www.pr-tech.com)http://www.pr-tech.com -Zena Design (http://www.zenadesign.com)http://www.zenadesign.com -Analysis of Factors Contributing To Unexplained Transmission Line Faults on a High Voltage Transmission Network (Bekker, Hoch)Analysis of Factors Contributing To Unexplained Transmission Line Faults on a High Voltage Transmission Network
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