DEVELOPMENT OF A MICRO-PROCESSOR-BASED TRANSIENT DATA RECORDING-SYSTEM FOR LOAD BEHAVIOR ANALYSIS

A microprocessor-based transient data recording system, developed in t he Taipower system, for the investigation of actual load behaviors dur ing system disturbances is described. The system is currently installe d (nine sets of such a system at the present time) at the level of pri mary substations and distribution substations in the Taipower system. Analytical tools to compute the corresponding voltage and current phas ors from the instantaneous three-phase voltages and currents measured by the system and to compute the corresponding real and reactive power s are presented. A procedure of applying the recording system to devel op an accurate load model for the Taipower system is detailed.