SYSTEM SEPARATION EQUIPMENT TO MINIMIZE POWER-SYSTEM INSTABILITY USING GENERATORS ANGULAR-VELOCITY MEASUREMENTS

The purpose of this newly developed equipment is to separate the power system when an out-of-step between two groups of generators within it is predicted. The out-of-step prediction method is based on the gener ator's angular-velocity data measured by electromagnetic sensors and g ears that are fastened directly to the rotors. The equipment was teste d by the large-scale power system simulator APSA (Advanced Power Syste m Analyzer), that is installed in the Kansai Electric Power Co., Inc. The equipment also underwent a field test.