Large-signal Stability Analysis of VSC with PLL for Distributed Renewable Power Grid-connected based on Takagi-Sugeno Fuzzy Model Theory

This paper investigates the large-signal stability of VSC with PLL by T-S fuzzy model theory. Taking the control loop dynamics and dimension disaster into account, the system-level stability analysis is completed includes the system parameters, control system of VSC and PLL. Proceeding from the T-S fuzzy model of FFTS, the calculation of a series of linear inequalities is introduced to construct the Lyapunov function and obtain according LS-DOA simply. Ultimately, it verifies the effectiveness of proposed stability analysis method through time-domain simulations results.