摘要
谐波电流的实时检测是有源电力滤波器实现的关键,数字化的实现引入了一定的时间延迟,影响了其滤波效果。将三相谐波电流进行Clark坐标变换到两相正交坐标系中,利用Kalman算法对系统进行建模,检测出各次谐波电流的幅值和相角。通过选取合理的Kalman状态变量,运用简单的代数运算向模型中增加了一个相位补偿角,来消除延时的影响。最后,利用Matlab进行仿真实验,验证了该方法的有效性和正确性。
Real-time detection of harmonic current is critical for active power filter （APF）. However, the digital implementation of APF arouses some time-delay, which affects the filter effect. A method to detect a random har- monic current with Kalman algorithm based on the Clark transformation is proposed. Through choosing reasonable Kalman state variables, it makes easily to add a phase-delay compensation angle for eliminating the influence on time-delay. In the end, simulation of Matlab proves the effectiveness and correctness of Kalman filter.
出处
《测控技术》
CSCD
北大核心
2014年第4期128-130,共3页
Measurement & Control Technology
基金
江苏省高校科研成果产业化推进项目(JHB2012-24)
