An Overview on Small-Signal Modeling and Stability Analysis Methods of Voltage-Source Converter Grid-Connected System

As the proportion of renewable energy sources such as photovoltaic and wind power generation in the power system continues increasing, the stability problems caused by the control of voltage-source converters (VSCs) have been increasingly emerging. At present, there are divergent opinions on the small-signal modeling and stability analysis methods for VSC grid-connected system, and there is a lack of consensus. This paper summarizes the latest developments in different modeling and analysis methods for VSC grid-connected system, analyze the relationships and differences between different methods, and theoretical analysis and time-domain simulation are presented to prove the accuracy and consistency of different methods when applied to system stability analysis.