Complex Coefficient Filtered Phase-locked Loop Method for Three-phase Unbalanced Voltage
In the power system is gradually showing the trend of weak grid,the three-phase power of the grid will of-ten appear three-phase imbalance and contain power harmonics conditions,these harsh conditions will be a variety of grid-connected inverter phase-locked loop structure of the rapidity,accuracy and stability of the higher requirements,the traditional SRF-PLL has been unable to meet the demand.This paper improves the traditional phase-locked loop based on the idea of complex coefficient filtering,and proposes a phase-locked loop system design method with complex coefficient filtering.The correctness of the proposed design method is verified by Simulink simulation experiments.
NETL
NSTL
万方数据
