基于正弦幅值积分器的新型2倍频锁相技术  

A Novel Phase Locked Technique of Double Fundamental Frequency Based on Sinusoidal Amplitude Integrators

作　　者：闫朝阳[1] 张青山[1] 白鹤[1] 吴晓雨[1] 

机构地区：[1]燕山大学,电力电子节能与传动控制河北省重点实验室,河北秦皇岛066004

出　　处：《电力电子技术》2017年第6期48-51,共4页Power Electronics

基　　金：国家自然科学基金(61671403);河北省自然科学基金(E2014203091)~~

摘　　要：针对电网电压不平衡及畸变工况下,同步旋转坐标系锁相环(SRF-PLL)方法对同步信息检测精度的影响,基于正弦幅值积分器(SAI)与级联型二阶广义积分器(SOGI),提出了一种新型2倍频锁相方法。在负旋转坐标系下,利用SAI对频率极性选择的特点,对2倍频分量进行了分离与提取,克服了SRF-PLL,在不平衡工况下产生2倍工频波动的缺点;在电网严重畸变的情况下,基于级联型SOGI良好的滤波性能,有效地提取出电网基波分量。介绍了级联型SOGI与SAI两种积分器,并与SRF-PLL方法进行了对比,仿真与实验结果表明,所提方法可行有效。For the unbalanced and distorted grid fanlts,the synchronous rotating fram phase locked loop （SRF-PLL） has influenced the detection accuracy of synchronization information.A novel phase locked loop method of double fun- damental frequency based on sinusoidal amplitude integrators （SAI） with the cascaded second order generalized inte- grator（SOGI） is proposed.The method uses the frequency characteristics of SAI under the negative rotation coordinate system, which separates and extracts the double fundamental frequency component from the unbalanced grid, overcom- ing the shortcomings of the SRF-PLL.In the case of serious distortion of the power grid, the method uses the excellent filter performance of cascaded SOGI,effectively extractes the fundamental component of the power grid.The basic principle of the cascaded SOGI and SAI is introduced, and the results are compared with the SRF-PLL.The effective- ness and feasibility of the method are verified by simulation and experiment.

关 键 词：正弦幅值积分器 不平衡电网 畸变电网 

分 类 号：TP321.2[自动化与计算机技术—计算机系统结构]