POWER SYSTEM MONITOR

PURPOSE:To grasp the condition of fault quickly and to lower the load by extracting and classifying condition change data of information concerning to fault upon occurrence of system fault then displaying the cause and the position of the fault. CONSTITUTION:System information is fed from electric stations A, B,... N through communication lines and devices 1, 2 to a monitor 6, and relevant information is extracted and displayed. A computer 3 contains a fault monitor program, a relay definition table and a fault reasoning table, and the cause and the point of fault are displayed on a CRT 4 or 5. By such arrangement, necessary information is provided preferentially to a driver and thereby fault condition can be grasped quickly and the load can be reduced.