State-Space Model of Quasi-Z-Source Inverter-PV Systems for Transient Dynamics Studies and Network Stability Assessment

Photovoltaic (PV) power systems are increasingly being used as renewable generation sources. Quasi-Z-source inverters (qZSI) a recent, high-potential technology that can be to integrate PV into AC networks. Simultaneously, concerns regarding the stability of increasing. Converters reduce damping grid-connected converter systems, leading instability. Several studies have analyzed and dynamics qZSI, although characterization qZSI-PV system in order study transient interactions has not yet been properly completed. This paper contributes small-signal, state-space-averaged model these issues. The is also applied investigate by analyzing influence parameters. Moreover, solutions mitigate instabilities proposed verified using PSCAD time domain simulations.