农村架空配电线路的杆塔定位（Pole positioning of overhead distribution lines in rural areas）.docVIP

农村架空配电线路的杆塔定位（Pole positioning of overhead distribution lines in rural areas） Pole positioning of overhead distribution lines in rural areas With the transformation of rural power grid scale in full swing, the rural overhead distribution lines and the new rectification task is very arduous and urgent time, in the rural areas of the overhead distribution lines in the design of the tower shaped tower, the location is the key, because the tower location is the safety and reliability of economic rationality and the appropriate operation will directly affect the line. This paper introduces the method of pole tower location using sag template curve. 1 preparation before positioning (1) familiar with the professional personnel to provide longitudinal line graph and planar graph, if there are conditions, the best location in the field personnel selection, in order to understand along on both sides of the topography, crossing and related geological conditions, so the hearts of a coarse spectrum on the full range of pole position. (2) the positioning personnel should know the division of residential areas, non residential areas and mountain areas, and the safety distance of crossing and so on, so as to change the template curves timely in the location of the towers. 2 make the positioning template curve A template is a set of curve curve by maximum sag curve, the ground distance curve and curve of composition, the scale should be consistent with the scale and profile of the line, and these curves in the maximum sag when the conductor in the air is similar to the shape of these curves is common in meteorological conditions within a certain region. (1) maximum sag curve. Accurate calculation of conductor sag to the catenary equation, the general project will span less than hanging point and other high-end distance or height and span ratio is less than 0.1 of the suspension point ranging from high-grade distance both using flat parabolic equation with high suspension point to re