Automation of Determining the Location of Damage of Overhead Power Lines

Abstract

Automation of damage location is based on the device and a set of algorithms. The device is built on the basis of a digital oscilloscope based on a computer (alarm recording). It allows to record and store information about the instantaneous values ​​of currents and voltages in three phases of all lines suitable for the substation. Further processing of instantaneous values, performed by the device—analyzer of fixed alarms, gives the desired set of mode parameters at the measurement point. The chapter provides a block diagram of the device. The choice of the moment of the beginning and the duration of the emergency analysis interval is described. The section shows the difference between the developed device and analogs. The main advantage of the developed device is the ability to analyze the modes according to secondary informative parameters obtained after processing the instantaneous values ​​of currents and voltages in the interval of analysis of the emergency mode. In this case, it becomes possible to use the criteria for determining the type of short circuit and the special phase. The block diagrams of algorithms of types of short circuits and a special phase are given. Also given the principles by which the location of a short circuit is determined.