Application of the Global Positioning System to the measurement ofoverhead power transmission conductor sag

摘要

This paper describes a method to directly measure the physical sagnof overhead electric power transmission conductors. The method usednrelies on the Global Positioning System (GPS) used in the differentialnmode. The direct measurement of sag is a main advantage of the concept.nThe digital signal processing required is described in detail in anfour-level configuration. The typical accuracy, response time, problems,nstrengths and weaknesses of the method are also described