陆原,汪周玮,郭素兵.基于单二阶广义积分器的三相数字锁相环设计[J].电测与仪表,2015,52(6):. LU Yuan,WANG Zhou-wei,GUO Su-bing.The Design of Three-phase Digital Phase-locked Loop Based on Single Second-order Generalized Integrator[J].Electrical Measurement & Instrumentation,2015,52(6):.
基于单二阶广义积分器的三相数字锁相环设计
The Design of Three-phase Digital Phase-locked Loop Based on Single Second-order Generalized Integrator
In some electronic devices associated with power grid three-phase voltage,it is very important to obtain the real-time fundamental wave phase of the power grid voltege accurately. Aiming at the condition of the power grid appearing unbalanced three-phase voltage, this paper put forward a design scheme of three-phase digital phase lock loop based on single second-order generalized integrator and do the simulation by Matlab/Simulink. The simulation results show that the phase lock loop can track the phase of three-phase power grid accurately when power grid appear three-phase drop and unbalanced three-phase voltage. The design principle is clear, simple structure and easy to implement. It is easy to transplant in FPGA and constitute the entire hardware integrated PLL; it also can be transferred in DSP and constitute a software phase locked loop.
