APPARATUS FOR CONTROLLING DISPLAY OF LINE TROUBLE OF SWITCHING DEVICE FOR AUTOMATING POWER DISTRIBUTION AND METHOD FOR PROCESSING THE LINE TROUBLE

摘要

PURPOSE: An apparatus for controlling display of a line trouble of a switching device for automating power distribution and a method for processing the line trouble are provided to prevent malfunction due to thrust current and counterflow trouble current for precisely displaying a trouble state. CONSTITUTION: An apparatus for controlling of a switching device includes voltage/current detecting elements(101,102..), analog filters(111,112,.) for filtering detected voltage or current band, a mux(12) for selecting one from a plurality of filtered voltage or current signals, a sample/holder(13) for sampling the selected signal periodically to maintain the value, an A/D converter(14) for converting the maintained signal into a digital signal, a digital low pass filter(21) for extracting a fundamental wave component from the digital signal, a phase comparator(22) for comparing a phase of the component, an amplifier(23) for detecting a shape of size change of the extracted fundamental wave, an overcurrent discriminating part(24) for discriminating overcurrent from the digital signal, a relay(41) for operating a switcher(42) of the line, a display(50) for displaying troubles of the line section, a modem(60) for transmitting the trouble to a central control system(200), and a controller(100) for taking measures for the trouble according to the shape of the size change and overcurrent.