摘要
补偿分量的准确实时检测,直接关系到有源电力滤波器的补偿效果。在三相电压畸变不对称且有频率波动的复杂工况下,提出了一种基于级联二阶广义积分的基波正序有功电流分量的检测新方法。构造的级联二阶广义积分算子同时具有移相、滤波和辅助锁频的三项功能。相比于常规的dq检测法,基于??轴系的检测方法,省略了锁相环和低通滤波器,可准确实时地求出电流基波正序有功分量,最后利用Matlab/Simulink仿真证明方法的有效性与可行性。
Accurate and real-time detection of compensated components plays an important role in compensation results of active power filter. Under the complicated condition of unsymmetrical and distorted three-phase system voltage with frequency fluctuation, a novel fundamental positive-sequence active current detection method based on series second order generalized integrator （S-SOGI） is proposed. Moreover the S-SOGI has three functions of phase-shift, filtering and assisted frequency locking. Compared with normal dq transformation detection method, the novel method is exposed on αβ reference frame without PLL and LPF, and the fundamental positive-sequence active current components can be obtained exactly and quickly. At last the simulation results show the efficiency and accuracy of the improved method under Matlab/Simulink.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2012年第5期10-15,共6页
Power System Protection and Control
基金
福建省自然科学基金资助项目(2008J040416)~~
关键词
级联二阶广义积分
不对称畸变电压
频率跟踪
改进的锁频环
谐波检测
series second order generalized integrator （S-SOGI）
unsymmetrical and distorted three-phase system voltage
frequency-tracking
enhanced frequency locked loop （EFLL）
harmonic detection
