Qualitative Analysis of the Impact of System Parameters on New Voltage Instability Phenomena in Renewable Energy Power Systems

With the increasing integration of high-proportion renewable energy, voltage stability issues dominated by lowvoltage ride-through (LVRT) control have become increasingly prominent. This study, based on an equivalent model of a renewable energy power system, focuses on the sensitivity of system parameters to voltage stability, as well as the impact of LVRT control parameters and line impedance characteristics on novel instability phenomena. Through theoretical analysis and electromagnetic transient simulation, this research reveals the nonlinear influence patterns of different parameters on instability phenomena and proposes strategies for optimizing system parameters in power grid planning and operation. The findings provide a theoretical foundation for enhancing the stability of high-proportion renewable energy power systems.