一种变频电网下基于自适应增强复系数滤波器的锁相环

The complex-coefficient filter-based phase-locked loop is widely used in state estimation for the constant frequency grid system. However, its performance under power systems with a variable frequency is generally unacceptable and related applications are consequently rare. This letter proposes an adaptive enhanced complex-coefficient filter-based phase-locked loop (AECCF-PLL) that accurately esti...