Conceptual Systematic Stability Analysis of Power Electronics based Power Systems

System stability is a great concern in power electronics based power systems due to the interactions caused by the wide timescale control dynamics of power converters. Inspired by extensive research works in the small signal stability analysis, this paper presents a systematic stability analysis framework, aiming to provide a holistic approach, identifying the instability roots and predicting stability region. The proposed approach is both for stability-oriented design and stable operation evaluation, aiding for a more reliable and secure power system. A case study is performed for a grid connected multi-converter system as a practical application with simulation and experimental verifications.