Eastern Interconnection model reduction based on phasor measurements

This paper presents a procedure for constructing the dynamic equivalent of large power system based on the Frequency Monitoring Network (FNET) measurements. It consists of determination of coherent regions, generator and load aggregation, and network reduction. The coherent regions are determined from FNET voltage angle responses using a divisive hierarchical k-means clustering algorithm. Generator and load aggregation based on the detailed model is performed. This procedure is applied to the US Eastern Interconnection (EI) system by building its dynamic equivalent model in PSS/E. Preliminary simulation results are provided. The dynamic equivalent of the EI system can be further developed for possible use as a decision aid for system operators.