| 摘要 |
PROBLEM TO BE SOLVED: To perform stabilization control, even when a wide-extent failure occurs due to the failure of a trunk transmission system by deciding the optimum stabilization controlling quantity by detecting the location of the failure and the failure of the trunk transmission system by comparing the value of kinetic energy at a fixed period of time, after the occurrence of the failure with a preset threshold. SOLUTION: A terminal device 1A computes the electric output of equivalent power generator (a single equivalent power generator for the operators being operated in a power plant 3A) at every hour, based on the voltage data and current data measured by means of a sensor 51A. Then the device 1A predicts the hourly changing locus of the kinetic energy and discriminates whether a failure occurs in a trunk transmission system or power system, by comparing the predicted kinetic energy value at a certain point of time after the occurrence of the failure with a preestablished criterion level. Therefore, whether a failure is a trunk transmission system failure or power system failure can be discriminated on-line, merely from the local backup information of the power plant, and stabilization control can be performed optimumly in accordance with the location of the failure. |
