Detection of coherent groups of generators and the need for system separation using synchrophasor data

Detection of groups of coherent generators is very important for balanced and optimal power system separation. Synchrophasor technology has made it possible to get the real time phasors i-e voltage and current along with the frequency. This real time information can be used to find groups of coherent generators. Hierarchical clustering algorithm is used on the rate of change of the generator bus voltage phase angles and rate of change of mean of the generator bus voltage phase angles are tested for the purpose of detection of groups of coherent generators. Initial results show that these approaches can be used for the purpose of real time detection of the groups of coherent generators.