基于最小二乘法的三相锁相环PI参数优化

发布时间：2018-01-10 06:16

本文关键词：基于最小二乘法的三相锁相环PI参数优化　出处：《华中科技大学学报(自然科学版)》2017年09期 　论文类型：期刊论文

【摘要】：针对带有低通滤波器的同步参考坐标变换三相锁相环系统,利用鲁棒控制理论将其转化为具有输入和输出干扰形式的简化线性系统结构.在简化的系统模型基础上,根据低通滤波器一般传递函数形式,按照极点配置原理推导了由比例和积分参数构成的超定方程组通用表达形式,并利用最小二乘法原理给出了比例和积分参数计算公式.利用仿真测试了带有一阶和二阶滤波器的锁相环系统动静态性能,仿真结果表明:提出的比例和积分参数优化方法能够获得满足设计者要求的PI参数.
[Abstract]:For synchronous reference coordinate transform three-phase phase-locked loop system with low-pass filter. The robust control theory is used to transform it into a simplified linear system structure with input and output disturbances. Based on the simplified system model, the general transfer function form of low-pass filter is presented. According to the principle of pole assignment, the general expression of overdetermined equations composed of proportion and integral parameters is derived. The formula for calculating the ratio and integral parameters is given by using the least square method. The dynamic and static performance of the PLL system with first and second order filters is tested by simulation. Simulation results show that the proposed proportional and integral parameters optimization method can obtain Pi parameters that meet the requirements of designers.
【作者单位】：武汉理工大学自动化学院;
【基金】：湖北省自然科学基金资助项目(2016CFB502,2015CFB586) 中央高校基本科研业务费专项资金资助项目(163111005)
【分类号】：TN911.8
【正文快照】： 随着电力电子技术在风力、太阳能等分布式发电系统中的应用,各种并网设备须要获得主电网准确的相位信息才能成功并网.为了获得准确的相位信息,诸如同步参考坐标变换锁相环技术(synchronous　reference　frame　phase-lock　loop,SRF-PLL)[1-8]、延时信号消除锁相技术[9-14]、

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