一种新型软件锁相环的实现方法  

A Realization Method of the New Software Phase Locked Loop

作　　者：巫伟男[1] 单峡[2] 罗耀华[1] 闻婷[1] 

机构地区：[1]哈尔滨工程大学,黑龙江哈尔滨150001 [2]金陵科技学院,江苏南京211169

出　　处：《电力电子技术》2013年第1期33-35,共3页Power Electronics

基　　金：国家海洋可再生能源专项资金项目(GHME2010GC02)~~

摘　　要：针对基于瞬时无功理论的软件锁相环(SPLL)在三相系统电压不平衡时锁相不准和相位非线性畸变的问题,分析了其产生的原因,提出一种基于小脑神经网络(CMAC)的智能算法与PD控制结合的复合控制方法,并结合改进双T网络的陷波滤波器的SPLL的控制策略,提高锁相控制系统对非线性信号的调节能力,实现SPLL中跟踪相位的线性变化,达到了良好的锁相效果。搭建了实验平台,对提出的控制策略进行了验证。实验结果表明,该SPLL稳态性能好,对三相系统电压不平衡造成的锁相偏差具有很强的抑制作用。For phase locked inaccuracy and phase nonlinear distortion problem under unbalanced voltage and based on the theory of instantaneous reactive,this paper analyses the reason of phase locked inaccuracy and phase distortion when the voltage is unbalance.A software phase locked loop（SPLL） is developed based on PD control and cerebellar model articulation controller（CMAC） combined with an improved double-T network of notch filter to improve the ability of the phase lock control system for the regulation of non-linear signal.The SPLL tracking of the linear variation achieve a well effective of phase locking.For verifying the proposed control strategy,a test platform is built. The experimental results show that the steady-state performance of the SPLL is well and can strongly inhibit effect of an unbalanced three-phase system voltage deviation.

关 键 词：锁相环 陷波器 小脑神经网络 三相电压不平衡 

分 类 号：TN911.8[电子电信—通信与信息系统]