电力系统自动化Issue(2)：115-121,7.DOI:10.7500/AEPS20130425011
基于梯度下降法的单相幅相锁相环优化设计
Optimal Design for Single-phase Amplitude-phase-locked Loop Based on Gradient Descent Method
摘要
Abstract
A single-phase amplitude-phase-locked loop(1MPLL) system based on objective function optimization ideasis designed and the design method of system parameters is discussed in detail.In order to improve the harmonic suppression capability,1 MPLL constructs the obj ective function based on integration of system deviation in the most recent time interval, the steepest descent direction is analyzed using the gradient descent method.And the nonlinear state equation of phase-locked loop system is derived to estimate the properties of the input signal.In order to carry out system performance analysis and parameter design,the system nonlinear state equation is linearized at the equilibrium point and the system parameters are designed with the root locus theory.The properties of the input signal are estimated quickly and accurately by IMPLL for a variety of power quality problems (such as amplitude mutation,frequency fluctuation,phase change,especially harmonic pollution),providing effective and reliable baseline for the detection and control of grid power electronic equipment.Simulation and experiment results verify the correctness of the system design and good system performance.关键词
锁相环/梯度下降法/根轨迹/谐波畸变Key words
phase-locked loop/gradient descent method/root locus/harmonic distortion引用本文复制引用
裴喜平,郝晓弘,陈伟,肖骏,王维洲,李恒杰..基于梯度下降法的单相幅相锁相环优化设计[J].电力系统自动化,2014,(2):115-121,7.基金项目
国家自然科学基金资助项目(51267012) （51267012）
甘肃省自然科学基金资助项目(2010406011) （2010406011）
甘肃省高等学校基本科研业务费专项资金资助项目(1103ZTC141)。This work is supported by National Natural Science Foundation of China(No.51267012)and Gansu Provincial Natural Science Foundation of China(No.2010406011) （1103ZTC141）
