Analytical Calculations Considering the Influence of No-Load Charging Currents in UHV Lines by Adjacent Lines

The phase measurement test of ultra-high voltage lines is based on the empty charge current when single-end closing as the measurement quantity, and when the empty charge line is close to the charged equipment, the empty charge current is easily affected, which affects the accuracy of the phase measurement test with load, and fewer analyses have been carried out at home and abroad to address this problem. In this paper, from the same voltage level lines with the same tower and parallel lines of different voltage levels, we analyse the factors affecting the empty charging current of UHV lines, and put forward an analysis and calculation method that considers the influence of the empty charging current of UHV lines by the adjacent lines, which can improve the accuracy of the current transformer phase measurement test with load, improve the efficiency of the UHV line test with load, and guarantee the safety and stability of the operation of the power system. safety and stability of power system operation.