Combined Transmission and Distribution Test System for Small-Signal Stability Analysis: Initial Results

In modern power systems is recommended to study the overall system with detailed understanding of the large-scale generation, the wider transmission network, the distributed renewable energy sources and the flexible loads. Therefore, detailed simulation models are required. In this paper, a combined transmission and distribution network synthetic model is developed to investigate the dynamic performance of the overall power system and analyse the interactions between its constituent parts. Conventional and modern power system configurations are considered. The small-signal stability of the power system is investigated by means of eigenvalue analysis and by applying the Matrix Pencil algorithm to identify the dominant modes contained in the dynamic responses.