| With the construction of 12 key transmission lines which the State Council implements in the air pollution prevention and control action plan in recent years,construction of UHV transmission lines experience leap-forward development.With the rapid progress of construction and technology of UHV transmission line,UHV overhead lines over-cross more and more crossed objects,especially power lines,and the situation is becoming more and more complicated.It is necessary to make a targeted optimal scheme after quick analysis and judgment of over-crossing risks of UHV overhead line,especially large-dimension conductor.Based on common construction methods which over-crossing crossed objects and the construction scheme of tension stringing across a large-section conductor without cross frame in a ±800kV UHVDC project,the tension?the sag and the safe distance which is a research selection whose UHV overhead lines and carrying ropes used for technology Of tension stringing when over-crossing without cross frame in the construction phase to the ground objects are solved for the overhead line and the overhead net without crossing frame with the method of drawing the sag curve by using the method of template comparison.Meanwhile,the relevant solution results will be calculated for the selection of mechanical tools which is used for over crossing system without cross frame.The results show that this method improves the intuitiveness and convenience of calculation and verification of over-crossing construction,which is put forward to solve the special crossing and crossing without crossing frame in similar projects as a new calculation and verification scheme,to improve the over-crossing efficiency of crossing without cross frame,and to provide reference and inspiration for the construction enterprises to develop the special construction schemes of similar projects.. |
PDF Full Text Request