电测与仪表2017，Vol.54Issue(2)：12-17,6.
基于改进型软件锁相环的正负序分量分离新方法研究
Study on new separation method of positive and negative sequence components based on improved software phase-locked loop
摘要
Abstract
In view of the traditional separation method for the positive and negative sequence separation has the shortcomings of poor versatility when the power grid is unbalanced,so we propose a new approach based on improved SPLL for separation of the positive and negative sequence component.It uses the better filtering effect of the second order generalized integrator for high times and positive and negative sequence cascade characteristic of DSC harmonic elimination by αβ transform and dq transformation,and then,it uses the software phase-locked loop principle to lock the frequency of the grid and feedback to the second-order generalized integrator and negative sequence cascade of DSC to separate the positive and negative sequence component of grid.This method can fast and accurately separate the fundamental component of positive and negative sequence under the conditions of grid voltage symmetrical,asymmetrical fault and power grid voltage frequency change,which can provide reliable control signal for power electronic converter control system.MATLAB/Simulink software simulation results show that the proposed method is feasible and effective.关键词
在电网电压不平衡条件下/正负序分量/二阶广义积分器/延时信号消除/软件锁相环Key words
under unbalanced grid voltage/positive and negative sequence components/second order generalized integrator (SOGI)/delayed signal cancellation (DSC)/software phase-locked loop (SPLL)分类
信息技术与安全科学引用本文复制引用
郭凯,程启明,程尹曼,黄伟,徐聪..基于改进型软件锁相环的正负序分量分离新方法研究[J].电测与仪表,2017,54(2):12-17,6.基金项目
国家自然科学基金(61304134) （61304134）
上海市重点科技攻关计划(14110500700) （14110500700）
上海市电站自动化技术重点实验室(13DZ2273800). （13DZ2273800）
