Application of a Simplified model of Solid State Transformer in Hybrid Residential Energy System - A Benchmark model

This paper presents a benchmark model for a hybrid residential energy system comprised of AC as well as DC loads, DG and, a storage unit. The benchmark is connected to the grid through a simplified model of a Solid State Transformer (SST), developed in MAT-LAB/Simulink. Distributed generation (DG) is established by modeling the PV using the solar irradiance information obtained by the SAM software. A battery is modeled to be present in the grid with State-of-Charge (SOC) battery controls governing its switching on and off times. Solar irradiance for various times of the year were collected from the SAM software and were used as in-feed for various simulation schemes to test the fidelity of the model, subject to the hybrid nature of loads. The results demonstrate the bi-directional power flow capability of the the simplified SST in the context of hybrid generation and uneven load demand, over a range of scenarios incorporating the variability in PV penetration and its effects on the distribution system.