Power System Stability Analysis and Testing of Micro and Nano Grids with Converter Interfaced Generation with Storage

This paper presents an experimental test set-up for analysis and testing of micro and nanogrids with converter interfaced generation with storage realized in the Power System Stability Laboratory at TU- Sofia within the project in support of PHD student. The solution proposed appears to be useful for research and demonstration of wide range of power system stability-related phenomena. Some valuable experimental tests concerning inverter behavior during short circuit occurrence are considered with an emphasis on different points of short-circuit occurrence and the effect of an energy storage system. Experiments demonstrating post disturbance unstable transient process are noted and discussed. A short discussion on some of the challenges and drawbacks of the solution is provided.