Study of three different approaches for development of power system aggregated load area models

The paper presents three different approaches for development of aggregated load area models (ALAM) in power systems. Among the three, the first one is Voltage-Two-Step (VTS) approach, which identifies ALAM parameters based on a Voltage-Match scheme implemented in two steps. The second is Current-Two-Step (CTS) approach. Similar to the VTS, this approach identifies ALAM parameters based on a Current-Match scheme realized in two steps. Direct-One-Step (DOS) approach is the third one. It identifies the ALAM parameters based on a Bus-Match scheme in one step. Theoretical explanation and analysis to these three approaches are reported in the paper and simulation studies were carried out using the model of the IEEE-14 Bus Power System. Three approaches were compared in the paper and some positive suggestions were proposed.